Hi there! I really needed a video by a physicist like this! The explanations of relativity and quantum mechanics really brought me more insight into the film and physics in general. Awesome stuff here! But I believe you have misunderstood how entropy inversion works in Tenet. This same exact confusion had been bugging me for a while, and I felt like Nolan had left a hole in the axioms he laid out for his world. You're right that freezing a cup of water decreases the entropy locally. But in Tenet, the entropy isn't simply decreasing, it's "reversing." Otherwise they would have called it entropy reduction. What they refer to entropy inversion (my hypothesis) is both a reduction in entropy as well as backwards flow of time. You're right that entropy and time aren't the same. That's exactly what the movie assumes as well. Hence the inversion not only reverses entropy, but also the direction of time for the inverted objects. I believe they mentioned something about the inverted objects being made out of antimatter particles (which Feynman hypothesized as being time reversed in nature). This explains how time is also flowing backwards along with the entropy. I'd like your thoughts on what I've written here. You might be able to see a flaw in my idea, or maybe you might find something insightful here! Physics forever.
I can definitely see you've put a lot of thought into your ideas! There is a flaw however - reversing entropy and decreasing entropy are the exact same thing. See, it is thought that entropy has an arrow much like the flow of time. Whenever you're decreasing it, you are essentially swapping that arrow's direction in that closed system.. But the action of changing that arrow's direction in any given closed system takes energy, thus increasing the entropy of the isolated system. Decreasing/reversing the entropy of an isolated system (universe) may turn out to be possible and I think it will be so!! We are just light years from understanding the true nature of reality. So, you shouldn't take all of this talk too seriously because the current understanding of things like this in physics may turn out to be totally wrong! Which is what I find to be the most exciting part of physics :) But excellent points and I definitely should have stated that. Physics forever, indeed!! Also, if you want some more sci fi stories about entropy, go read Isaac Asimov's short story The Last Question (my fav short story). I'm sure you'll love the ending :)
@@DylanJDance I see... That makes sense now! I see where I went wrong. Thank you for that clarification. Helped a lot! And I'll be sure to check out that book. I'm still an undergrad so I've got much to learn! Discussions on movies like this really help us figure out the intricacies of our real world. Love that :) Thank you for writing back!
It's a crackpot total BS concept. Time is not a tape you can just reverse play anymore than you can unring a bell. Interstellar, outside the black hole tesseract, was plausible and realistic. This is just BS quantum nonsense akin to infinite parallel universes, if time were reversible it would render everything and anything meaningless (nevermind the concept of 2+ of you coexisting at the same time to fight it out), don't care how many times they say they can't change the past, they totally are. I know Nolan consulted with Kip Thorn, but it looks like he actually took his cues from Dr Strange instead, remember his time reversal trick with the green Infinity Stone?
@@el_killorcure This is a movie for the God's sake. The very people can accept the time travel in "The End Game" but cant accept the creative liberty from Nolan? TENET is a fictional movie for the sake of entertainment, not a National Geography documentary.
At first I didn't understand the movie at all. Then I watched it 20 more times, and then inverted myself and explained it to my past self coming out of the movie for the first time. So yeah, I understood it on the first watch.
My biggest gripe with the film is that in it, the past cannot be changed. So what you have done could not have convinced your past self (the grandfather paradox).
@@GeauxDucks to create a closed loop of a future self explaining to the past self. He does not need to watch the movie 20 times again but he does need to continue the loop. If he does not continue the loop there would only be 2 versions of himself that understand the movie. In other words he has created a time look that ensures he always understands the movie after the 1st watch. The cause is him not initially understanding the effect is it being explained to him. You can't change the past/cause or the future/effect. Therefore time loop made
The movie makes actually no sense. No matter how you think about it. I mean the plot espacially: No matter how well it get's explained to us it is still full of plotholes and motives that do not make any sense. As for the phsysics in this movie, it is SCI-FI so no problem. We are allowed to be creative and invent new things and ways of storytelling. We just have to make sure that the physics of the universe we set the story in, no matter how unbelievable they are, are justified withing it's own universe so that it makes sense. Well... Nolan completely failed at that point. He created a universe where he partially explaines the rules, but then in other scenes he just reinvents the rules without any explanation thus,render the universe of Tenet completely nonesensical. Everybody understands Terminator 1 and 2. Everybody understands The avengers, everybody understands Mission Impossible, why? Because their universes have a set of rules that are settled in the beginning of each movie, thus making us believe that it all works out. This is the the beauty and the art of good storytelling. And Nolan has none of that.
@activelink activdisc it is actually Nolan's most hardcore sci-fi film, dealing with entropy inversion. It is literally theorised by the Maxwell's demons hypothesis. The film's science 'fiction' aspect just assumes that it is possible in that world. Inception was relatively more leaning towards fantasy than this one. Lots of made up rules. Watch Neil DeGrasse Tyson's videos on Gravity and then Interstellar. He finds a lot of silly flaws in the former, not the latter. So i dunno which films are more "sciency" to you. Back to the future? Lol.
@activelink activdisc a pseudoscientific film is one that claims its stuff to be true/possible in the real world. Tenet doesnt do that. It certainly is sci-fi. 'Signs' is more like pseudoscience. Maybe u find science itself cringy.
@activelink activdisc reversal of entropy leads to reversal of time. And the guy making the video is a physicist. A physicist is one who has studied and majored in physics. Have you? Or are u venting your personal dislike for Nolan's films through mocking science? It's perfectly okay to not like the films, but what u said about pseudoscience was factually incorrect. Tenet is sci-fi and it doesnt claim that it works in the real world. How about you name your favourite sci-fi films other than the cringy Nolan's so we can have comparison? Unless u hate the genre itself.
@activelink activdisc Neil DeGrasse Tyson is concerned with outer space. That's the field he works in. Gravity and Interstellar had that premise, so he spoke about them. Tenet isnt about outer space. And NDT doesnt talk about every sci-fi film that comes out, even if its great. Still have doubts?
Fun fact : this guy explain everything in order but in different time 0:00 evening 3:35 afternoon 9:45 morning 12:55 back to evening he forgot some explanation and go back to the past to record again T E N E T is real, thats explain why he's in a suit 😱
@Peter Grahame I loved the soundtrack and saying any movie that can't be understood by anyone is pretentious is also nonsense look at surreal movies, david lynch movies and so on as long as the movie gives you some ideas and has an interesting concept the movie is great you don't have to understand it Nolan himself said his movies a rather experiences than movies
@Peter Grahame you didnt read my comment...no Christopher Nolan movie is a movie which you understand after watching it once. You have to watch it multiple times to get a better picture and yes after watching it for the first time I understood a few things not all and the second time I understood quite a deal more especially as someone who did study thermodynamics but I dont wish to understand it fully its similar to an open ending you dont want to know everything you just like the idea and it gives you more ideas and you can use your imagination to me thats art while what you are speaking of sounds more like a documentary to me
My take on Tenet is this: Someone in the future found out how to flip the time arrow of an object. In the present people think this is related to entropy since if they put the inverted object in a closed system, the entropy of that system decreases. Now reversing a person essentially changes the direction of time for them. From their perspectrive nothing really changes but for everyone else they disappear into the past. So from an outsiders perspective one person steps into the time arrow reversing machine, creating a second instance of that person existing parallel to the first one, only living time backwards until they step back into the machine. When time now runs normally for the person, an outsider will see 3 instances of that person, 2 traveling forwards in time, one traveling backwards. When the person now reaches the point in time where he first stepped into the machine, the other person traveling forward in time will step into the machine leaving only one instance of that person from this point on. Think of it like in a game of snake where all the snakes travel up and think of taking turns as changing the flow of time for you.
From the non inverted bystander they would seem to disappear when they invert. Leading up to the inversion you would see 2. 1 that isn’t inverted and one that is inverted traveling into the past (that’s why they seem to be going in reverse). The inverted would walk backwards into the turnstiles as the non inverted steps forward in. At this point in the forwards time point of view they would simply seem to disappear.
I am a Physics nerd and I understood the concepts the movie was trying to explain, but imagining the inverted objects travelling such that their entropy was reversed was really mind boggling. Exactly how I expected a Christopher Nolan movie to be!
I've always had a fascination towards physics, as it really explains what the hell actually happens around you. In my opinion, everybody should know some amount of physics, if not, science in general.
This is an amazing breakdown. Loved everything about his dude. smart, great communicator, stylish. Nolan should hire him as a consultant on his next film.
That's one thing I didn't like about Tenet. While it didn't dumb down the timelines or the plot, it makes these references to the grandfather paradox and other very basic ideas that these people would've all heard about. It seemed very misplaced. But I can understand why they're there. They're necessary to explain an important concept in the movie and to make the audience think about possible consequences. But they just didn't feel natural. I'm not sure it could've been solved any better. It probably was the least inelegant way to explain them.
I think it’s too early for you to interpret inversion as the typical “time travel” ppl see in other movies. I think time is just our interpretation of change based on our memories. Without consciousness of memories, time doesn’t exist. Time fits into mathematical equations to represent change, but in reality, a million years ago and today are the same thing; the only thing different is increased in entropy. There’s only now. Changes are permanent. This is why “time travel” can’t happen bc we can’t reverse due Heisenberg uncertainty principle; time is an illusion. You obviously know more than I do, but just want to share my perspective of time. I understand your explanation of why time and entropy aren’t the same, but that’s only if we see time as something that actually exists. The movie isn’t about traveling back in time because typical understanding of time doesn’t exist in this movie, but it sees entropy as the only variable that builds the world. Tenet doesn’t reverse nonexistent time. It reverses entropy making it look like it’s reversing “time.” I love the movie btw.
If our memories are the basis for time, that would assume that the things we don’t know don’t exist until we experience them. It would also be very difficult to exist if we have no memories. The reason were able to survive is due to our ability to recall behaviors that satisfy the conditions of our existence. Think about if you forgot what to do when you got hungry every single time you got hungry.
Time travel can happen and can be easily achieved by beings of higher dimension. It's just that we as 3 dimensional beings in a 3d world, can only manipulate the 3 dimensions. Once you move up in dimension to 4D, time just becomes something accessible; the curvature of space-time space becomes something "visible".
Its not really confirmed in the film. I believe its one of the really eire factors of the whole story. Nick also says «nobody knows» The future humans dont know - for sure. They are hoping for a multiverse so they can survive, and are desperate enough to try to kill their past on «50/50» shot.
Not entirely true, the people of the future are banking on the multi universe theory, why they think that destroying the people of the past won't kill them in the future.
Their are multiple realities. This is confirmed in a few minor unexplained scenes. For example in one iteration of the realty a woman is wearing a black dress and then in the next shot she’s wearing a red dress
I highly recommend attending a screening with subtitles for the deaf and hard of hearing if you can find one near you. I got about 50% of the plot on my first watch and thought it was in the top half of Nolan's filmography; saw it again today with subs and got 100% of the plot (I think!) and think it's in his top 3 or 4 movies. A great le Carre-esque moody spy thriller with deep thematic undercurrents about mankind's relationship with faith and reality that bubble to the surface in the climax.
I’ve heard about Nolan being influenced by LeCarré in this film, for example having a nameless protagonist. Haven’t read any of his books, I’ve just seen Tinker Taylor Soldier Spy, but even if Tenet y more action heavy both have that cold war-like atmosphere, like a sensation of decay. Can you elaborate on how much you think Lecarré influenced this film, please?
U know thats ANOTHER THING I DISLIKED..MI COULD NOT TELL WHAT THEY WERE SAYING. I WAS CONSTANTLY GOING WHAT HE SAY!!!! SERIOUSLY I COULD NOT HEAR A THING AND THEY VOLUME WAS ALMOST ALL THE WAY UP!!!!
Time has a preference, time always flows in the same direction. When he says that it has no preference, he intends to referance time reversal symmetry. In time reversal symmetry the equation are valid if the flow of time is reversed. This means that there is not experiment that we can do to ascertain the direction of time. The implications is that the starting conditions and termination conditions of an experiments are interachable. This means that theoretically events in time are reversible, which would the equivalent of switching the beginning and end events. Time is not changing, but the tendency of objects to become disordered is being suberted. This is not impossible revising prior states is not impossible just improbable.
How I understand the movie is their universe is actually predetermined, there's no branching multiverse. Why does the protagonist has to fight himself in the vault when he goes backwards even with preexisting knowledge of events? Can he make a different choice? He has to fight because he did, his opening stab wound is a testament to that. It also dooms any attempts at creating a time paradox - there's always something that prevents it. The future big reverse is always a failure because there's always Tenet to stop it. Time only moves in any direction for an "inside" observer, but all of the time already exists if looked at from "outside". The big question is, if an object is put in reverse, when and how does it appear for the forward moving observer? When the protagonist walks into a room he later fights himself in, there's already a gun on the floor. His reverse self picks it up a bit later, but why was it lying on the floor before? The only answer I can think of is it just materialized seemingly out of nothing some time before the events. Same for the damage done by an inverted object/bullet - no one installed a shattered glass with bullet holes in it, they formed here shortly before the events, again, like the stab wound did. Which means that an inverted object can invert things around it for some time. But then they should be able to freely breath in reverse, as the air would be inverted too on contact with their lungs. Except if it only works when a sufficient amount of "reversed energy" is applied to it. It would also mean that if a reversed objects exists in contact with non-inverted world for some time its "reversed energy" would gradually be cancelled out by the world. If I remember correctly, the lab coat lady at the beginning tells that the same happens as more objects get inverted, they tamper with the world around. Also the objects forming out of thin air sounds silly (which probably is the reason it's never shown on camera), but reversed people do basically the same when they enter the machine to revert to normal - a forward moving observer will experience two people materializing out of nothing.
They never said time itself was going backwards; but with a reversed entropy of your own, that's how your consciousness will desipher it. Time is always going forward, but you experience it backwards.
Thanks, that was so much better than the non-physicist explanation I saw! I'm surprised you liked the movie though given that you said you'd need to understand many of these concepts beforehand to get the plot and that I felt the dialogue was often muffled making the inadequate explanations given along the way even harder to follow. I feel this would have worked far better as a book where people could have time to consider the various plot devices and even re-read passages one or several times to ensure understanding. As a movie I found it thrilling but fairly incomprehensible.
Thanks so much Formulaic! Loved the movie; I'm easily entertained with some physics talk you see. And great point! Would be considerably more digestible in book form.
@@unimpressedsquidward3059 i was thinking the same. but also aging is not clearly shown in the movie as everything takes place in span of few weeks. so we may never know
Good video all around, but I have a thought on another way to view it. I saw another comment explaining that they are not only reversing the entropy, but also the flow of time of something since the two are separate. I think if you look in the perspective of a inverted object or person it might make more sense. A person moving backwards from our perspective is moving forward in their perspective. Their forward is our backwards. Therefore in their perspective entropy will still increase and physically still work as it should, but from our perspective it would look as if it is reversing. The reserve entropy would just be a side effect from them actually reversing the flow of time.
You lost me at the Many Worlds in Tenet. From what the movie shows and tells us, there is only one timeline where all the events happen/have happened/will happen. There are no branching realities, which means that time travelling/reversal cannot change any event in the past, just make those events happen in the first place. And that's the self-consistency principle formulated by Novikov, which is in direct contract with the Multiverse/Many Worlds interpretation. That is my understanding, please correct me if I'm wrong. Very interesting and thought-provoking video! :)
I think the movie was amazing. The lackluster character development and the whole bad relationship between protagonist and villians wife didnt bother me since I was so fascinated by the concept. The movie is hard to get so its definately not for everyone. But for someone who really likes science fiction and thinking hard while watching movies its amazing and definately worth a watch.
Also wanted to say the movie is clearly not scientificly accurate but you should just eat up the whole time = entropy bullshit since its science fiction anyways
The movie didn't need character development, the situation had already begun. But from the decisions each and every individual makes in the movie is the character you need to know. The Protagonist throughout the movie always makes sure not to involve civilians, even made sure the cargo guys in that plane where not in it. Him helping the lady out wasn't really romantic, he simply has the means to help and therefore does.
I agree, I think if you want nolan film that has good character drama and moments I'd say Interstellar..but even though I don't quite understand Tenet, it's probably the best I have seen nolan capturing action on film, ..as a pure spectacle, I think people will be impressed..
How many sci fi books/movies have you read/watched? This movie pretty much follows every cliche of the genre down to the T, predictable in almost every way. It’s not even a mediocre sci fi flick
I don't understand why you say that Tenet assumed entropy and time to be equivalent. To me it seemed clear that it was treating entropy as a scalar magnitude and time as a direction. The rate of entropy change was constant in both directions (like speed), but the direction in which that entropy was applied was inverted, leading to a perceived inversion of a vector (like velocity).
I actually had a difficult time grasping the unfolding of the movie because of the lot of the things you're talking about, and because of that I did enjoy it a little less. Regardless, it was a fantastic film. But I also have a hard time believing Nolan would willingly ignore some pretty basic concepts of Physics as you demonstrate. I think what he was instead trying to do is paint a picture of a determinism as it unfolds through the medium of a film or a book. Very simply just taking two directions of a story and layering them on top of each other, and making them appear as if they resemble a plausible "multi-space" for the characters to exist. He very staunchly invests in the 2 key characters at points in the film (*cough*, the end), which leads me to believe that this is intended to give a "multi-perspective" through them, rather than a "multi-world" through us and our knowledge of space-time.
This actually helped so much man, thanks. For the people saying it was hard to comprehend, I get that. Just pause the video when you need to, and take a moment to think it through and grasp the concepts he’s trying to explain.
THank you!!!! I'm an engineering student, and I've taken some advanced thermodynamics and energy storage courses, so when I realized the movie isn't even going to attempt to explain how "reversing Entropy reverses time"... I just decided to ignore their whole explanation, and just substitute it with "Magic". Then and only then did I begin to enjoy the movie. The whole "Entropy" thing in the movie annoyed so much.And I see a lot of people who are trying explain the movie by the same logic of the movie ... And it's making the movie sound so dumb, even though it is exploring some very interesting aspects and theories of time... Also thank you for kind of pointing out how conscious beings (Living breathing thinking human beings) should not be lumped in with the unconscious things (a bullet on a table) in regards to how they interact with and affect their surroundings (and vice versa). That's another thing that took me out of the movie for a little bit. This movie is very enjoyable and fun... but it was sloppy in it's explanations and character beats.
Engineers are certainly welcome! Just don't be approximating pi to 3 and gravity to 10 round here ;) Glad you enjoyed the video and I agree, the movie is still very enjoyable and fun! Certainly going to get a lot of people thinking about entropy which is super cool.
Inversion makes it so the Effect comes before the Cause. But the Cause is still equal to the Effect. Just because it’s not well thought out doesn’t mean it’s dumb.
I’m just a teenager and I haven’t studied much physics, but I really liked this video and I agree with your theory on consciousness. Also about time, I think that time manipulation can’t be possible since time is only a concept and doesn’t have a physical form, which is why we can’t affect it. I have a theory (this might be an obvious theory, but I haven’t studied advanced physics so I don’t know) that only things that can be physically contained can be manipulated.
So many of my friends got confused from watching this. But really, all you need is knowledge over physics concepts and the quantum world. I'm in high school and don't do physics, but i love the topic. Films like this (including Interstellar) are so fun to watch, because they are so thought provoking. Thank you for this video. It affirms what i thought while watching the movie, which is a great confidence boost. Keep it up!
You have NO idea how that loop hole was maddening because no one could clear it out for me. Tnx mate, you've earned your self a sub and like and share and what ever TH-cam could allow me. Well deserved I say.
One thing that Tenet gives away is that it's a palindrome which was a easy catch. Palindrome was a term I first heard about in my 7th grade math class where characters read forwards and backwards are the same. The inversion aspect really was quite interesting because it's like rewinding time similar to rewinding a video cassette, but here you are rewinding time and trying to somehow you are looking for a specific scenario and trying to change it within that inversion. For me when I saw this film the complicated aspect was with the time travel aspect by mixing paradoxes where past selves are mirrored but it's altered where the character speaks in his native language. When your past selves is already traveling backwards in time using a time inversion device it has to be a sequence where nothing should change.
If you aren't someone with the time to study the physics, but would love to understand the bigger but more basic scientific picture, like me, then you really only need to differentiate time from entropy and have a rough idea of what reversing an entropy of something is. The basic idea is not how time interacts with the object, but like the fridge example in this video, the act of manipulating the movement, or changes the object experiences within the normal flow of time. This isn't entropy but rather what is happening to the characters in the film, and it is technically incorrect but you should be able to follow the film this way. If anyone thinks I've gotten this the wrong way round, or explained it entirely wrong, please, by all means correct me.
Just came from your Rick & Morty video, and damn, I love this style of videos. I’m by no means a physicist, but I love experimenting with its principles to try to make sense of this world. Ever since watching Tenet, I’ve only partly been able to explain why it didn’t make sense, and this video really helped me understand the bigger picture; so thanks for that! If you’ve got some time on your hands, I would recommend you to watch a German show called Dark on Netflix. Not just because of its intriguing science (which, like most shows/movies, is flawed), but also because of its rather insane concept and storyline. You wouldn’t want anything spoiled, so I would just press play and watch it instead of looking it up. Trust me, it’s great, if you can let some of the science slide (just like in Tenet)! (If you decide to watch it, do so with English subtitles and keep the native German dialogue.) Subscribed!
There is no grandfather paradox; All the events in the movie had already happened. But what irritates me is the violation of the conservation of energy. When the person enters the entropy inverter he immediately starts moving backwards in time, but after that point in time there is nothing to take his place, he just disappears.
Even the universe violates the conservation of energy sometimes so I didn't mind that one so much ;) (at least it seems to; it probably doesn't!) But yes, that's another reason why it assumes many-worlds!
@@NitpickingNerd I thought about it and you know? I think you are right!... Because When an object is inverted it has negative mass and negative energy. So basically if the object inverts it would cancel itself out during the time it is inverted. And everything lines up perfectly since both the normal and inverted object always meet at the point of inversion.
@@SilentClouds Well the scarier thought is like the Star Trek theory that teleporter kills the person then recreates them somewhere else, so the question would be did the person they were cease to be alive before they teleported or in tenets case inverted.
Just a thought: “The intrinsic quantum indeterminacy of things produces a blurring . . . which ensures -- contrary to what classic physics seemed to indicate -- that the unpredictability of the world is maintained even if it were possible to measure everything that is measurable . . . The blurring is due to the fact that we are ignorant of the microscopic details of the world.” This is from Carlo Rovelli's book "The Order of Time", 2017. Makes a hell of a lot more sense to me than the block universe concept, so I'm with this young man on the Quantum theory rather than the Relativity theory as primary.
After watching CHRISTOPHER NOLANS film Common man I think I skipped my PHYSICS classes during my schooling let me go learn the basics and comeback to watch NOLANS films
Thought experiment: What would happen if you were to drop an inverted bullet? Experiment 1: You're holding an inverted bullet with your palm facing towards the ground. You let go, opening your hand with your palm still facing the ground. What happens? Experiment 2: Same thing but your palm facing sideways towards the wall. What happens?
Simple1DEA Inverted bullet's dont fly... They are just inverted. Reversed. It would fall because nothing made it to be caught. It was explained at the beginning of the movie.
@@youtuberecommended9183 No but realistically it wouldn't fall downwards because the inverted bullet's timeline wouldn't make sense. If it falls downwards then you've just dropped a regular bullet and you won't be able to tell the difference. Remember cause and effect are flipped. The effect for the bullet is the hand catching it (dropping from regular perspective)... then what would be the cause that pushes the bullet upwards from the table? Which is why I used the phrase flying upwards because there is no force allowing the bullet to go upwards from the table into the hand. The most realistic answer is that this scenario is a paradox unless there are conditions that allow the backwards and forwards flow of time to work ie. an inverted person throwing the bullet upwards to the bottom side of the hand.
Tenet doesn't assume that consciousness is separate from physics. When you invert in the movie, you also invert your consciousness. From the point of view of the normal universe, an inverted person will have their cognition running backwards. Suppose Bob gets inverted at the age of 8, and spends 10 years in that state getting an education. Alice, going forward in time, might watch an 18 year old inverted Bob spend 10 years undo all their homework, unread books, and unwatch videos, and hence unlearning everything they know until inverted Bob gets into a turnstile as a little boy. The information learned visually in the brain becomes electrical signals that travel to their retinas, and then the information is converted to photons that shoot out at books or screens.
Always had a question. If you run time backwards, quantum effects SHOULD be deterministic. Assume event of decay happened and radiated photon. When you run time backwards you'll see photon flying into debris, getting absorbed and debris are welded together in a single atom. That's scenario should be deterministic (at least much more probable considering uncertainty). Is that correct? I have more questions. I'll ask them if i get answer.
Thank you for your relatively easy explanation for a layman like myself! Do you have any suggestions for basic (entry-level) textbooks on physics that explain the major theories without hurting my brain with equations too much? One point that sometimes (usually when there is alcohol, obviously) comes up in discussions (by either my ignorant self or one of my friends) about QM is that it only appears to be probabilistic, but that it may in fact still be deterministic (even though we do not perceive it to be a such). What would be your take on this? Also, what is your perspective on the relationship between a 'free will' and 'determinism'? Compatible or simply impossible? (I studied philosophy and I think that I currently agree with Kant's approach to the matter.) :)
As a person studying machine learning and neuroscience.. your interpretation of what conciousness is, is spot on in my opinion!! We might not understand the details but it's quite obvious it's just an emergent phenomenon coming from computations performed by neurons
I'm admittedly captivated by films and video games that explore these presumptions about reality itself while merging it with the exposition of geopolitical conflict.
Tl;dr We dont understand enough about time yet to completely disprove the feasibility of tenets plot but from what we currently know it is stretching things a bit, im just grateful such intellectually stimulating cinema still exists. Great vid mate.
I think Mr. Christopher Nolan might have liked to watch “Strawberry Fields Forever” by The Beatles and to play Grid Autosport in which you could undo errors by using ‘Flashback’ option. I hope TENET would not be so complicated as the psyche of a Japanese Schoolgirl.
Now I'm only a third year physicist but my main problem with the movie's physics is that it's applied inconsistently: e.g. sometimes inverted bullets cause wounds to form, but sometimes to heal. I think what this points to in the film is that there isn't a clear understanding of where this time/entropy reversal starts and stops. The reason for this is that entropy doesn't necessarily increase for a single object (as per your fridge example), but for isolated SYSTEMS, so to talk about a reverse entropy object doesn't really work once it starts interacting with regular matter.
I think you’re overestimating how much ‘only you and your professor understood the film in your screening’. I’m not a physicist, but I understood all of the physics concepts. The irony is that, as a doctor, my problems lie more with the effects on biology 😂
similar issue but im a computer engineer and they just kept saying "the algorithm" -just a fancy word for a series of calculations- and then she imbued it into a physical form and split it across 9 places on earth and the whole time im like "what about AI?"
Algorithm and AI are not the same. Read Alan Turing's 1948 essay Intelligent Machinery. There's no AI in TENET. There were talking robots in Interstellar, but still not AI as Turing envisaged machine intelligence.
That statement was very cringey. I studied Political Science, and also had no trouble understanding how the movie worked. No need to put yourself on a pedestal.
of all the videos i've seen trying to tie up some loose ends in my mind, now that i watched the movie for a second time, this video is the one that helped me the most, thank u a lot, you got yourself a subscriber :)
I honesty wish I could sit down with you and talk about the universe for hours. Your theory on what thoughts are really caught me off guard and made me think it's true. Amazing video, easiest like I have ever given. Keep it up man 👌👌👌👌
This is the first time I've been annoyed by commercials interrupting a video I'm watching. Great explanation my friend, a very fascinating topic indeed!
This is a great vid! As a lover of film and science, thank you very much. Extremely insightful. Only thing I'd say is that rather than saying "the movie assumes" say "the movie asks us to assume". Since science fiction asks us to suspend disbelief, it's not entirely correct to say the assumptions are held by the movie. It asks us to incorrectly assume those things for the duration of the film.
The big problem this movie had is how normal objects interacted with inverted objects. When we first see the world going in reverse, the protagonist steps into a puddle. Right before he takes his step, we see the splash of water, then he steps into it. That's perfect, he sees EFFECT then CAUSE since he's in reverse. So a normal person on the outside sees him walking backwards, stepping into the puddle, then splash. CAUSE then EFFECT. So, why do we see through-out the whole movie bullet holes that then get fixed by people shooting in reverse? The people shooting in reverse should see EFFECT then CAUSE, bullet hole then shot (then bullet hole gone) while normal people should always see CAUSE then EFFECT, shot then bullet hole, even if the shot came from someone going in reverse (like the puddle splash).
I think we the spectators are constantly being inverted through out the movie ..the point of view changes constantly toward the most cinematic shot . Just a theory
@@samphyllobates4765 Yea, there is no rhyme or reason to it, the physics of it make no sense. It's just what looks more cinematic, the rules of this world change based on that.
@@Taikiji the puddle is not in reverse, so you, reversed, see effect then cause. You are using a gun in reverse. You and the gun reversed, you shoot and see cause then effect of the reversed gun, so from your pov, you are shooting. Look at the masked man fight scene. There are 2 pov showed, when he becomes the masked man, he is shooting the bullets from his perspective
I wish I knew! I can tell you what our current understanding predicts but there are many holes in our best theories and many things we still don’t know so there’s not much point, because you can be almost certain that it is wrong! I think the only certainty currently in physics is that we have no idea what’s really going on. Time as we know it for our local part of the multiverse may have begun at the Big Bang, but I’m leaning towards this place being infinite. Whatever that means! Where did it come from? How? Why? I wish I knew Daniel!!
Thing about time is that it's not just time, it's space-time, which is described as a geometry. Geometry itself is way more complicated than just cubes and triangles and what not...the shapes that are possible go beyond a level of understanding that lots of us have trouble understanding. For example, the graphs you see in the stock market can be described by a Strange Attractor in chaos theory which is a geometry (fractals)...which at first hearing this makes no sense...but you can take information that we normally wouldn't think of as being a geometry and describe it as such. Einsteins revelation was describing space and time as a single geometry of curvature. When you are in space, you are also in time. So when we ask if it had a beginning and end, it doesn't really make sense to maybe even ask that question...Did the geometry just appear? can it disappear? The answer is probably way more complex than just asking if there was a start and a finish. Right now physics is in a really exciting place. The uploader of this video mentioned that space time is doomed...this you can do some research on by one of my favorite physicists Nima Arkani Ahmed. This dude knows his shit about physics and the questions you might think to ask get turned on your head and now there's even more stranger questions that might put our questions into perspective.
I think the movie says that time goes backwords in our perspective. Feynman also won a Nobel with Wheeler theory, about One eletron, so.. I wouldnt say they are so wrong... About the another version of themselves, they couldn't touch them (annihilation). I loved the movie and i want to watch it again... I understood a lot of things because they make a lot of sense, more when they quote the physic theory in the movie. After I watched I was crazy about the Feynman and Wheeler theories.. Very Interesting! Thanks!!
I don't usually leave a comment only 4 minutes into a 20 minute movie review, but I feel it strangely fitting to do this in a non-linear fashion, being that what I have seen so far is a series of competing and nested conversation/thought loops. If I find out at the end that Nolan had a hand in this I will not be surprised... and... bravo. I think. The wardrobe and hairstyle changes were a nice touch... or a foreshadow... or a reason to fire your continuity director. If the next 16 minutes turn out totally normal I will come back and add on to this review. EDIT - Okay, it got better and I learned stuff. Thanks.
It doesn't say that if they see each other they'll destroy the world, it says if they come into contact they "annihilate" each other. It seems they meant physical 'flesh to flesh' contact. It wasn't particularly clear on the consequence to be fair, but that fits with the rest of the film (such as the end battle, where they see each other's side, and the reverse version of the fight scene between you know who and you know who).
Essentially yes! But keep in mind entropy wouldn't increase if time didn't pass. So, they are both responsible! In the not so distant future, we may be able to tackle the entropy problem in reference to death
This was fantastic and I enjoyed it very much! One thing I was hoping you would speak on though was heat death of the universe. I learned about it in 96 when I read Superman/Doomsday in comics. Superman has to take Doomsday to heat death with a time machine because it's the only way he will die permanently. They call it entropy, but they mean heat death.
Heat death and entropy are related but not the same. There’s another theory that heat death will eventually reach a point that is so cold that entropy of the entire universe reverses… it’s my favorite. Because perhaps the end of everything is not the end. 😊
@@TreArtist Yes, that's why I mentioned that when they say "entropy" in the comics as the event that Superman takes Doomsday to in order to end his threat to the universe, they mean the event of universal "Heat Death." As in all subatomic movement has ceased and the entirety of the universe is in true thermal equilibrium. I once watched a program called "The Sidewalk Astronomer" that chronicled a man that created a blueprint for high powered telescopes that only cost a couple hundred dollars instead of tens of thousands. He said there is also a theory that the universe expands and contracts like the ocean, and that the universe is in an expansion phase and we won't know how long it lasts nor the triggering sequence until it happens, further in favor of your hope that the end is not the end. Love and hope kinfolk, thank you for your comment, I also hope that the end is not the end.
1.Algorithm inverts the Gun and Bullet, 2.Gun has caused the bullet to go forward 3. Hence you can use the same inverted gun and inverted bullet to pull the bullet that's been fired back into its original state, Now, How can I handle the inverted bullet since I never have touched it or caused it to change its entropy And if I have touched the bullet then the bullets new entropy is of this world, and by touching it I have given it new state of entropy (Cause) so I won't be able to have it back in my hand without throwing it on the ground first, and u can only have it back in my hand if me and the bullet have been inverted in the same plane of existence So the first scene where John picks up the inverted bullet without even contacting it is not possible since he was not the one who gave that bullet an inverted entropy "The Scientist" who was with John had changed the bullets entropy by handling the bullet first and if the TeneT rule is applied here then it says that the movement of time is exactly the same in both the worlds, If you are inverting yourself at the date March 31st then it'll take you exactly 10 days to reach the date March 21st and vice versa so there are no temporal jumps, So going forward takes the same amount of time as going backwards, So if you have moved forward then in the same plane if you wish to go backwards you'll take the same path, this relates to the objects not any living creature, So if the doctor has put the bullet on the table then only she should be able to pick it up in reverse And once if the object's entropy is changed, then the object acquires a new state of entropy and at that very moment the object losses it's ability to travel in reverse entropy stage, They didn't explain it, they said don't try to understand it, feel it, And that's my argument if everything is physical then how can a mental state of another living subject change the position of a physical object And if this is the case then I should be able to pull anything to my self if I'm in an inverted world like telekinesis
His mental state I don't think was the driving force, he was able to pick i up because to the bullet he dropped it. It was on the table because of him. That's why he questioned free will. Now he didn't invert it... necessarily but I think the term inversion is confusing here because while we call the bullet inverted, we don't actually know that it is, we just know that it is to us. It may be going to a turnstyle in our past and for all we know it might have come from a turnstyle in our future, but it could just as likely have been constructed by our counterparts moving "backward" from the future, and will eventually decay in our past, without having gone through any sci fi inversions.
Your dual world theory isn't a proper understanding of the mechanics of this movie. From the reversed bullet's perspective, it is traveling backwards in time, so from its perspective, it is dropped by the protagonist in the scene you are referring to. It was inverted in the future.
@@comterrier Yes but the point is, if the bullet is processed by the machine and has its entropy inverted then all of its movements should be in reverse, so if the scientist pulls the bullet out and handles it then it gives the Bullet a new state of entropy, and if there's a new state then the machine failed on a quantum scale, and nice the bullet has the regular world entropy and should not be able to flow in reverse, Scientist moved it forward so now it's in forward motion, so John shouldn't be able to catch it, the Bullet should not be able to go in reverse now, unless it's in a quantum State where there are two bullets of the same mass existing in the same plane but that also can't happen since they'll suck eachother up and annihilate itself into a singularity (Man of Steel, destruction of world engine). So the science and logic of the Movie Universe fails here.
@@mymyscellany if the machine is inverting any objects entropy then the object should not be able to move forward in real time, but when the Scientist touches it and puts it on the table, that's a forward movement and magically John is able to make it go in reverse by just "Feeling" it because the cause didn't came at that point before he thought he had dropped it, thus in an inverted world if I "Feel" that I threw as stone somewhere that is in my sight I should be able to call it back in my hand by telekinesis,
@@HariharThaker it's more likely "fate" than telekinesis. If it is telekinesis then summoning bullets to the gun will be nonsensical. If "fate", then the bullet & the casing in the gun chamber exert a "force" that nudge the actor to align in the correct position so that the bullet recombine.
Aside from the great presentation, the fact that you're wearing a neck tie made me pay attention to the entire lecture/explanation. Harkens me back to my college days, except we weren't discussing the scientific merits of a movie.
I’m sorry if this has already been posited. I automatically assumed their consciousnesses were moving in reverse with them. The words that people moving forward hears were in reverse, so I took it as relatively everything attached to the matter moving in reverse was also moving in reverse. That explains why perspective changed in the movie depending on what character was being followed.
You say that the movie Tenet suggests the Many-World interpretation. I disagree. The characters don't rule it out, but the members of Tenet believe there is only 1 universe and they try to prevent paradoxes. In a sense that is not exactly the same as directly rejecting the many-worlds interpretation, but only because it is framed differently and doesn't take aim at the many-worlds interpretation.. They say that "What happened, happened" and "If that universe is possible, we aren't living it in." They doubt that other universe other than the one they already know are possible (or at the very least, they deem them irrelevant). Neil mentions the idea of multiple universes, but only to suggest that it would be hard to know if you were in a different one.
Hi mate. Watched the movie.Got decent understanding of physics (not degree level).Generally I'm not ocd about science in movies... But I got so upset during this movie. When at the beginning the scientist lectured the guy about inversion explaining that the whole thing it's like rewinding a tape I immediately thought... Gravity mate.. Where do you put gravity? I would be glad if you could explain if gravity is also a problem as my gut suggested.
Haha I mean nobody currently understands how gravity fits together with the other 3 fundamental forces of nature (referring to the standard model of particle physics) so I don't blame him for just pretending like it doesn't exist! Gravity is still a complete mystery too. So, how gravity would be affected if we reversed time (even just for an object) which is also a great mystery of physics, I have no idea!!! No one can tell you that if they are being honest, they can only guess. But yes, gravity is a big big problem in the movie and an even bigger one in reality! In Einstein's picture, gravity is simply the curvature of spacetime, not a force. Yet the standard model doesn't agree and it is our best current understanding of reality in physics. We have some problems in physics!
Hi there, I share the same feelings of ocd, but only towards Nolan films haha. And about gravity, I think I have an answer. Gravity in the movie isn't affected because only the objects are inverted. The inverted objects are seemingly made of antimatter particles (an exact copy of the original one, just anti), so almost all the mass is still the same. Since gravity is affected by mass (more precisely energy), nothing "much" changes about gravity. This does open up questions about how inverted objects don't simply annihilate on creation or maybe sometime later in the movie. Does anyone have an answer for this? I'm curious to know as well.
I see all the clever points you have made... I was puzzled by the physical interactions with inverted people to begin with!.. How can you jump back on your feet when your (not inverted) counterpart has knocked you on the floor? .. This completely seems to defy the laws of gravity (at least for me).. I mean.. What a non-expert sees before trying to grasp entropy etc.. (So casually explained by the protagonists btw) is that gravity causes you to fall on the floor after grappling and tripping.. Isn't gravity acting on you when you are inverted? If it was.. What would make you jump back so effortlessly when you are lying on the floor? This seems so mad to me that I keep thinking I got it wrong and this sort of interaction with inverted people is possible.. because how can someone make a movie of this kind addressing such complex physical matters without making sure that basic things make sense.. Without being certain that fights between inverted selves and not inverted selves are somewhat plausible ?!?..
Definitely a movie to be consumed more than once. The physics were beyond me, but I still really liked it. I would have appreciated talking to a physicist after watching, so your breakdown here was really interesting.
he has to do it to preserve the past. But weirdly he didn't know his own past! his partner Neil knew our hero fought with his future self but never tell our hero what to do, he just did it own his own.
Hi there! I really needed a video by a physicist like this! The explanations of relativity and quantum mechanics really brought me more insight into the film and physics in general. Awesome stuff here!
But I believe you have misunderstood how entropy inversion works in Tenet. This same exact confusion had been bugging me for a while, and I felt like Nolan had left a hole in the axioms he laid out for his world.
You're right that freezing a cup of water decreases the entropy locally. But in Tenet, the entropy isn't simply decreasing, it's "reversing." Otherwise they would have called it entropy reduction. What they refer to entropy inversion (my hypothesis) is both a reduction in entropy as well as backwards flow of time. You're right that entropy and time aren't the same. That's exactly what the movie assumes as well. Hence the inversion not only reverses entropy, but also the direction of time for the inverted objects. I believe they mentioned something about the inverted objects being made out of antimatter particles (which Feynman hypothesized as being time reversed in nature). This explains how time is also flowing backwards along with the entropy.
I'd like your thoughts on what I've written here. You might be able to see a flaw in my idea, or maybe you might find something insightful here!
Physics forever.
I can definitely see you've put a lot of thought into your ideas! There is a flaw however - reversing entropy and decreasing entropy are the exact same thing. See, it is thought that entropy has an arrow much like the flow of time. Whenever you're decreasing it, you are essentially swapping that arrow's direction in that closed system.. But the action of changing that arrow's direction in any given closed system takes energy, thus increasing the entropy of the isolated system. Decreasing/reversing the entropy of an isolated system (universe) may turn out to be possible and I think it will be so!! We are just light years from understanding the true nature of reality. So, you shouldn't take all of this talk too seriously because the current understanding of things like this in physics may turn out to be totally wrong! Which is what I find to be the most exciting part of physics :)
But excellent points and I definitely should have stated that. Physics forever, indeed!!
Also, if you want some more sci fi stories about entropy, go read Isaac Asimov's short story The Last Question (my fav short story). I'm sure you'll love the ending :)
@@DylanJDance I see... That makes sense now! I see where I went wrong. Thank you for that clarification. Helped a lot!
And I'll be sure to check out that book. I'm still an undergrad so I've got much to learn! Discussions on movies like this really help us figure out the intricacies of our real world. Love that :)
Thank you for writing back!
@@DylanJDance and AC said "Let there be light!" And there was light- :)
It's a crackpot total BS concept.
Time is not a tape you can just reverse play anymore than you can unring a bell.
Interstellar, outside the black hole tesseract, was plausible and realistic.
This is just BS quantum nonsense akin to infinite parallel universes, if time were reversible it would render everything and anything meaningless (nevermind the concept of 2+ of you coexisting at the same time to fight it out), don't care how many times they say they can't change the past, they totally are.
I know Nolan consulted with Kip Thorn, but it looks like he actually took his cues from Dr Strange instead, remember his time reversal trick with the green Infinity Stone?
@@el_killorcure This is a movie for the God's sake. The very people can accept the time travel in "The End Game" but cant accept the creative liberty from Nolan? TENET is a fictional movie for the sake of entertainment, not a National Geography documentary.
At first I didn't understand the movie at all. Then I watched it 20 more times, and then inverted myself and explained it to my past self coming out of the movie for the first time. So yeah, I understood it on the first watch.
brilliant :)
LOL
My biggest gripe with the film is that in it, the past cannot be changed. So what you have done could not have convinced your past self (the grandfather paradox).
If you understood it the first time, then why would your past self watch it 20 more times?
@@GeauxDucks to create a closed loop of a future self explaining to the past self. He does not need to watch the movie 20 times again but he does need to continue the loop. If he does not continue the loop there would only be 2 versions of himself that understand the movie. In other words he has created a time look that ensures he always understands the movie after the 1st watch. The cause is him not initially understanding the effect is it being explained to him. You can't change the past/cause or the future/effect. Therefore time loop made
Now we need a video explaining the explaining video.
😂
Haha lol ahaH
True👍
bruh, i only understand like 20% of this video....Still, great explanation
😂😂 like that
dude ur the most physicist looking dude ever
Chad physics guy
He looks like Eddie Redmayne from the theory of everything
He looks like he should be the Doctor from Doctor Who 😂
He's just missing the motorized wheel chair and speech synthesizer!
Jim The EDC Guy 😂🤣
If this guy was confused about the movie, I didn't have a chance
I'm nothing special Taylor! So I'm sure we were equally as confused during the movie!
@@DylanJDance then we normal folk certainly have no chance
The movie makes actually no sense. No matter how you think about it. I mean the plot espacially: No matter how well it get's explained to us it is still full of plotholes and motives that do not make any sense. As for the phsysics in this movie, it is SCI-FI so no problem. We are allowed to be creative and invent new things and ways of storytelling. We just have to make sure that the physics of the universe we set the story in, no matter how unbelievable they are, are justified withing it's own universe so that it makes sense. Well... Nolan completely failed at that point. He created a universe where he partially explaines the rules, but then in other scenes he just reinvents the rules without any explanation thus,render the universe of Tenet completely nonesensical.
Everybody understands Terminator 1 and 2. Everybody understands The avengers, everybody understands Mission Impossible, why? Because their universes have a set of rules that are settled in the beginning of each movie, thus making us believe that it all works out. This is the the beauty and the art of good storytelling. And Nolan has none of that.
@@Leprutz We ain't gonna read your rant man😂😂😂 We're here for the fun of a film
@@vb8428 Don't worry I'm over it.
TENET (and most Christopher Nolan movies) will appeal to Engineers and Scientists - who love cracking or solving complex problems.
@activelink activdisc it is actually Nolan's most hardcore sci-fi film, dealing with entropy inversion. It is literally theorised by the Maxwell's demons hypothesis. The film's science 'fiction' aspect just assumes that it is possible in that world.
Inception was relatively more leaning towards fantasy than this one. Lots of made up rules.
Watch Neil DeGrasse Tyson's videos on Gravity and then Interstellar. He finds a lot of silly flaws in the former, not the latter.
So i dunno which films are more "sciency" to you. Back to the future? Lol.
@activelink activdisc a pseudoscientific film is one that claims its stuff to be true/possible in the real world. Tenet doesnt do that. It certainly is sci-fi. 'Signs' is more like pseudoscience.
Maybe u find science itself cringy.
@activelink activdisc reversal of entropy leads to reversal of time. And the guy making the video is a physicist. A physicist is one who has studied and majored in physics. Have you? Or are u venting your personal dislike for Nolan's films through mocking science?
It's perfectly okay to not like the films, but what u said about pseudoscience was factually incorrect. Tenet is sci-fi and it doesnt claim that it works in the real world. How about you name your favourite sci-fi films other than the cringy Nolan's so we can have comparison?
Unless u hate the genre itself.
@activelink activdisc Neil DeGrasse Tyson is concerned with outer space. That's the field he works in. Gravity and Interstellar had that premise, so he spoke about them.
Tenet isnt about outer space. And NDT doesnt talk about every sci-fi film that comes out, even if its great. Still have doubts?
@activelink activdisc what makes you care so much? waste of time
Fun fact : this guy explain everything in order but in different time
0:00 evening
3:35 afternoon
9:45 morning
12:55 back to evening
he forgot some explanation and go back to the past to record again
T E N E T is real, thats explain why he's in a suit 😱
Yep, that was intentional... ;)
@@DylanJDance Mind Blown!! lol
Love love love this! Explanation inverted!
This man is explaining tenet in reverse time. WOW, someone really loved this movie! 😅😁 I mean, we all do 😏
This video is actually quite like TENET. I didn’t understand it but loved it 😂
😂
😂😂quite right
hahahahahaha Winner comment
physics is cool though. tenet is a fever dream.
I wanted to understand tenet, so I watched this video, now I need another video to understand this.
"dont try to understand it. Try to feel it"
In other words smoke a fat j before
Before entering everyone been warning but we are stubborn enough to against this.
@Peter Grahame I loved the soundtrack and saying any movie that can't be understood by anyone is pretentious is also nonsense look at surreal movies, david lynch movies and so on as long as the movie gives you some ideas and has an interesting concept the movie is great you don't have to understand it Nolan himself said his movies a rather experiences than movies
@Peter Grahame you didnt read my comment...no Christopher Nolan movie is a movie which you understand after watching it once. You have to watch it multiple times to get a better picture and yes after watching it for the first time I understood a few things not all and the second time I understood quite a deal more especially as someone who did study thermodynamics but I dont wish to understand it fully its similar to an open ending you dont want to know everything you just like the idea and it gives you more ideas and you can use your imagination to me thats art while what you are speaking of sounds more like a documentary to me
in other words, Nolan saying "I know it doesn't make sense, but it's cool, right?". And somehow ppl feel intelligent watching this movie.
My take on Tenet is this:
Someone in the future found out how to flip the time arrow of an object. In the present people think this is related to entropy since if they put the inverted object in a closed system, the entropy of that system decreases. Now reversing a person essentially changes the direction of time for them. From their perspectrive nothing really changes but for everyone else they disappear into the past. So from an outsiders perspective one person steps into the time arrow reversing machine, creating a second instance of that person existing parallel to the first one, only living time backwards until they step back into the machine. When time now runs normally for the person, an outsider will see 3 instances of that person, 2 traveling forwards in time, one traveling backwards. When the person now reaches the point in time where he first stepped into the machine, the other person traveling forward in time will step into the machine leaving only one instance of that person from this point on. Think of it like in a game of snake where all the snakes travel up and think of taking turns as changing the flow of time for you.
yes
yup
The don't disappear into the past it just looks like their moving in reverse but to them your moving in reverse
From the non inverted bystander they would seem to disappear when they invert. Leading up to the inversion you would see 2. 1 that isn’t inverted and one that is inverted traveling into the past (that’s why they seem to be going in reverse). The inverted would walk backwards into the turnstiles as the non inverted steps forward in. At this point in the forwards time point of view they would simply seem to disappear.
Someone = The Protagonist
I am a Physics nerd and I understood the concepts the movie was trying to explain, but imagining the inverted objects travelling such that their entropy was reversed was really mind boggling. Exactly how I expected a Christopher Nolan movie to be!
Damn i went to the movies just to relax my self and i get out with a headache and now here i am watching videos of physics like if i were in school😂😂
Unknown 🤣
I've always had a fascination towards physics, as it really explains what the hell actually happens around you. In my opinion, everybody should know some amount of physics, if not, science in general.
The Joker in the Dark Knight was entropy.
An agent of chaos.
Underrated
Hey dude you have no knowledge about entropy as your sentence makes no sense.
@@thehealingguy1503 people like the word chaos for some reason
No joke I just watched the film came home and typed “Tenet Explained”. This is the third video I’ve watched🤣
Same☹️
I have watched 5 videos😂😂😂
this man has to now explain the explanation now.
oh and i dont understand how somebody could dislike this video.
Haha you're too kind! I'll try to continue the discussion and explain these same things more thoroughly in videos about other movies :)
This is an amazing breakdown. Loved everything about his dude. smart, great communicator, stylish. Nolan should hire him as a consultant on his next film.
Thanks for the kind words Royce.Tell him I'm free!
I loved the movie, it made me think. I love movies that don't dumb things down to me.
Walker One Agreed!
Guess Nolan never ever dumbed down a movie.
Tenet = 007 + Primer
Pretty sure this one did, but it's still a headache. (I loved it so chill, it's not a bad thing).
That's one thing I didn't like about Tenet. While it didn't dumb down the timelines or the plot, it makes these references to the grandfather paradox and other very basic ideas that these people would've all heard about. It seemed very misplaced. But I can understand why they're there. They're necessary to explain an important concept in the movie and to make the audience think about possible consequences. But they just didn't feel natural. I'm not sure it could've been solved any better. It probably was the least inelegant way to explain them.
I think it’s too early for you to interpret inversion as the typical “time travel” ppl see in other movies. I think time is just our interpretation of change based on our memories. Without consciousness of memories, time doesn’t exist. Time fits into mathematical equations to represent change, but in reality, a million years ago and today are the same thing; the only thing different is increased in entropy. There’s only now. Changes are permanent. This is why “time travel” can’t happen bc we can’t reverse due Heisenberg uncertainty principle; time is an illusion. You obviously know more than I do, but just want to share my perspective of time. I understand your explanation of why time and entropy aren’t the same, but that’s only if we see time as something that actually exists. The movie isn’t about traveling back in time because typical understanding of time doesn’t exist in this movie, but it sees entropy as the only variable that builds the world. Tenet doesn’t reverse nonexistent time. It reverses entropy making it look like it’s reversing “time.” I love the movie btw.
I agree. if we think time is an illusion then many questions are answered.
The only problem we are facing now is our understanding of time.
Ur perspective that million years ago and today are the same is just too good to give a skip
I liked your explanation better👍
If our memories are the basis for time, that would assume that the things we don’t know don’t exist until we experience them. It would also be very difficult to exist if we have no memories. The reason were able to survive is due to our ability to recall behaviors that satisfy the conditions of our existence. Think about if you forgot what to do when you got hungry every single time you got hungry.
Time travel can happen and can be easily achieved by beings of higher dimension. It's just that we as 3 dimensional beings in a 3d world, can only manipulate the 3 dimensions. Once you move up in dimension to 4D, time just becomes something accessible; the curvature of space-time space becomes something "visible".
Not as smart as I'd like to be, but I AM trying 👍
I feel the exact same way. No better way to do that than to be curious :)
They should have put you in the movie to explain stuff that makes it sound simple!
there is no multiuniverse in tenet，everything happened in one unverse
“Everything that has happened, happens”
Its not really confirmed in the film. I believe its one of the really eire factors of the whole story. Nick also says «nobody knows» The future humans dont know - for sure. They are hoping for a multiverse so they can survive, and are desperate enough to try to kill their past on «50/50» shot.
Not entirely true, the people of the future are banking on the multi universe theory, why they think that destroying the people of the past won't kill them in the future.
@@nickrhodes9274 past, present and future are one thing
Their are multiple realities. This is confirmed in a few minor unexplained scenes. For example in one iteration of the realty a woman is wearing a black dress and then in the next shot she’s wearing a red dress
This is the smartest looking dude I've ever seen.
😂😂😂😂
he looks like clark kent and peter parker mixed together
I highly recommend attending a screening with subtitles for the deaf and hard of hearing if you can find one near you. I got about 50% of the plot on my first watch and thought it was in the top half of Nolan's filmography; saw it again today with subs and got 100% of the plot (I think!) and think it's in his top 3 or 4 movies. A great le Carre-esque moody spy thriller with deep thematic undercurrents about mankind's relationship with faith and reality that bubble to the surface in the climax.
Robin all his movies are great aren’t they!
I’ve heard about Nolan being influenced by LeCarré in this film, for example having a nameless protagonist. Haven’t read any of his books, I’ve just seen Tinker Taylor Soldier Spy, but even if Tenet y more action heavy both have that cold war-like atmosphere, like a sensation of decay. Can you elaborate on how much you think Lecarré influenced this film, please?
@@foglias he said as mich about the cold war when explaing to JDW on the boat.
U know thats ANOTHER THING I DISLIKED..MI COULD NOT TELL WHAT THEY WERE SAYING. I WAS CONSTANTLY GOING WHAT HE SAY!!!! SERIOUSLY I COULD NOT HEAR A THING AND THEY VOLUME WAS ALMOST ALL THE WAY UP!!!!
@@sislertx well, I sure heard everything you said.
his forehead is not overexposed, he's just thinking too hard
He’s just radiating physics god energy
😂😂 legend
Thanks for the explanation..wish u could throw few diagrams to help illustrate wht u ment because not everyone understands what u said
You look like you should be in Tenet haha
Did they explicitly explain time-inversion with entropy-inversion in the movie? I don't remember. I always understood it as reversion of causality.
I think so! Could be mistaken. I think the ending confirmed it though.
Time has a preference, time always flows in the same direction. When he says that it has no preference, he intends to referance time reversal symmetry. In time reversal symmetry the equation are valid if the flow of time is reversed. This means that there is not experiment that we can do to ascertain the direction of time. The implications is that the starting conditions and termination conditions of an experiments are interachable. This means that theoretically events in time are reversible, which would the equivalent of switching the beginning and end events. Time is not changing, but the tendency of objects to become disordered is being suberted. This is not impossible revising prior states is not impossible just improbable.
@non person what do you mean by that
I came to see if the plot would be explained, I left with expositions on the nature of entropy, time and even consciousness. Touche youtube.
Keenan you caught me - just used it as an excuse to talk some physics 😋
Same 😂
How I understand the movie is their universe is actually predetermined, there's no branching multiverse. Why does the protagonist has to fight himself in the vault when he goes backwards even with preexisting knowledge of events? Can he make a different choice? He has to fight because he did, his opening stab wound is a testament to that.
It also dooms any attempts at creating a time paradox - there's always something that prevents it. The future big reverse is always a failure because there's always Tenet to stop it. Time only moves in any direction for an "inside" observer, but all of the time already exists if looked at from "outside".
The big question is, if an object is put in reverse, when and how does it appear for the forward moving observer? When the protagonist walks into a room he later fights himself in, there's already a gun on the floor. His reverse self picks it up a bit later, but why was it lying on the floor before? The only answer I can think of is it just materialized seemingly out of nothing some time before the events. Same for the damage done by an inverted object/bullet - no one installed a shattered glass with bullet holes in it, they formed here shortly before the events, again, like the stab wound did.
Which means that an inverted object can invert things around it for some time. But then they should be able to freely breath in reverse, as the air would be inverted too on contact with their lungs. Except if it only works when a sufficient amount of "reversed energy" is applied to it. It would also mean that if a reversed objects exists in contact with non-inverted world for some time its "reversed energy" would gradually be cancelled out by the world. If I remember correctly, the lab coat lady at the beginning tells that the same happens as more objects get inverted, they tamper with the world around.
Also the objects forming out of thin air sounds silly (which probably is the reason it's never shown on camera), but reversed people do basically the same when they enter the machine to revert to normal - a forward moving observer will experience two people materializing out of nothing.
Neil, how'd you turn into an aussie?
I'm the antimatter version of Neil that popped out off screen after entering the machine. Aussies are convict british - anti-british :)
Lol. This thread made my day. 🤣
They never said time itself was going backwards; but with a reversed entropy of your own, that's how your consciousness will desipher it. Time is always going forward, but you experience it backwards.
Thanks, that was so much better than the non-physicist explanation I saw! I'm surprised you liked the movie though given that you said you'd need to understand many of these concepts beforehand to get the plot and that I felt the dialogue was often muffled making the inadequate explanations given along the way even harder to follow. I feel this would have worked far better as a book where people could have time to consider the various plot devices and even re-read passages one or several times to ensure understanding. As a movie I found it thrilling but fairly incomprehensible.
Thanks so much Formulaic! Loved the movie; I'm easily entertained with some physics talk you see. And great point! Would be considerably more digestible in book form.
Time never flows backward in Tenet though, just the entropy. At least that was the impression I got. Inverted people still age normally.
No because it’s going backwards if your from the future and inverted your ageing forwards going backwards
But if entropy reversed on a person they will become Benjamin Button. Ageing should not be normal in this case
@@unimpressedsquidward3059 i was thinking the same. but also aging is not clearly shown in the movie as everything takes place in span of few weeks. so we may never know
I think this was not observed as everything that happens in the movie are pincer movements of immediate futures/pasts
do you know what entropy is? the people age backwards
Good video all around, but I have a thought on another way to view it. I saw another comment explaining that they are not only reversing the entropy, but also the flow of time of something since the two are separate. I think if you look in the perspective of a inverted object or person it might make more sense. A person moving backwards from our perspective is moving forward in their perspective. Their forward is our backwards. Therefore in their perspective entropy will still increase and physically still work as it should, but from our perspective it would look as if it is reversing. The reserve entropy would just be a side effect from them actually reversing the flow of time.
11:12 You said you were writing a Sci-Fi book? Tell me more about it, I’m super interested!
Great video by the way!
Thank you so SO much. I loved the movie but I still needed these things un-packed to grasp it better. And your suit is fantastic.
You are SO welcome Jordan!
You lost me at the Many Worlds in Tenet. From what the movie shows and tells us, there is only one timeline where all the events happen/have happened/will happen. There are no branching realities, which means that time travelling/reversal cannot change any event in the past, just make those events happen in the first place. And that's the self-consistency principle formulated by Novikov, which is in direct contract with the Multiverse/Many Worlds interpretation. That is my understanding, please correct me if I'm wrong. Very interesting and thought-provoking video! :)
I think the movie was amazing. The lackluster character development and the whole bad relationship between protagonist and villians wife didnt bother me since I was so fascinated by the concept. The movie is hard to get so its definately not for everyone. But for someone who really likes science fiction and thinking hard while watching movies its amazing and definately worth a watch.
Also wanted to say the movie is clearly not scientificly accurate but you should just eat up the whole time = entropy bullshit since its science fiction anyways
Well put! Ideas > character development
The movie didn't need character development, the situation had already begun. But from the decisions each and every individual makes in the movie is the character you need to know. The Protagonist throughout the movie always makes sure not to involve civilians, even made sure the cargo guys in that plane where not in it. Him helping the lady out wasn't really romantic, he simply has the means to help and therefore does.
I agree, I think if you want nolan film that has good character drama and moments I'd say Interstellar..but even though I don't quite understand Tenet, it's probably the best I have seen nolan capturing action on film, ..as a pure spectacle, I think people will be impressed..
How many sci fi books/movies have you read/watched? This movie pretty much follows every cliche of the genre down to the T, predictable in almost every way. It’s not even a mediocre sci fi flick
I don't understand why you say that Tenet assumed entropy and time to be equivalent. To me it seemed clear that it was treating entropy as a scalar magnitude and time as a direction. The rate of entropy change was constant in both directions (like speed), but the direction in which that entropy was applied was inverted, leading to a perceived inversion of a vector (like velocity).
I actually had a difficult time grasping the unfolding of the movie because of the lot of the things you're talking about, and because of that I did enjoy it a little less. Regardless, it was a fantastic film. But I also have a hard time believing Nolan would willingly ignore some pretty basic concepts of Physics as you demonstrate. I think what he was instead trying to do is paint a picture of a determinism as it unfolds through the medium of a film or a book. Very simply just taking two directions of a story and layering them on top of each other, and making them appear as if they resemble a plausible "multi-space" for the characters to exist. He very staunchly invests in the 2 key characters at points in the film (*cough*, the end), which leads me to believe that this is intended to give a "multi-perspective" through them, rather than a "multi-world" through us and our knowledge of space-time.
This actually helped so much man, thanks. For the people saying it was hard to comprehend, I get that. Just pause the video when you need to, and take a moment to think it through and grasp the concepts he’s trying to explain.
THank you!!!!
I'm an engineering student, and I've taken some advanced thermodynamics and energy storage courses, so when I realized the movie isn't even going to attempt to explain how "reversing Entropy reverses time"... I just decided to ignore their whole explanation, and just substitute it with "Magic". Then and only then did I begin to enjoy the movie.
The whole "Entropy" thing in the movie annoyed so much.And I see a lot of people who are trying explain the movie by the same logic of the movie ... And it's making the movie sound so dumb, even though it is exploring some very interesting aspects and theories of time...
Also thank you for kind of pointing out how conscious beings (Living breathing thinking human beings) should not be lumped in with the unconscious things (a bullet on a table) in regards to how they interact with and affect their surroundings (and vice versa). That's another thing that took me out of the movie for a little bit.
This movie is very enjoyable and fun... but it was sloppy in it's explanations and character beats.
Engineers are certainly welcome! Just don't be approximating pi to 3 and gravity to 10 round here ;) Glad you enjoyed the video and I agree, the movie is still very enjoyable and fun! Certainly going to get a lot of people thinking about entropy which is super cool.
Science-FICTION not science-WILLMAKESENSETOPHYSICISTS
Inversion makes it so the Effect comes before the Cause. But the Cause is still equal to the Effect. Just because it’s not well thought out doesn’t mean it’s dumb.
I’m just a teenager and I haven’t studied much physics, but I really liked this video and I agree with your theory on consciousness.
Also about time, I think that time manipulation can’t be possible since time is only a concept and doesn’t have a physical form, which is why we can’t affect it.
I have a theory (this might be an obvious theory, but I haven’t studied advanced physics so I don’t know) that only things that can be physically contained can be manipulated.
So many of my friends got confused from watching this. But really, all you need is knowledge over physics concepts and the quantum world. I'm in high school and don't do physics, but i love the topic. Films like this (including Interstellar) are so fun to watch, because they are so thought provoking.
Thank you for this video. It affirms what i thought while watching the movie, which is a great confidence boost. Keep it up!
You have NO idea how that loop hole was maddening because no one could clear it out for me. Tnx mate, you've earned your self a sub and like and share and what ever TH-cam could allow me. Well deserved I say.
When he said "Circuits...." THAT is what time is. A Circuit. A closed circuit.
One thing that Tenet gives away is that it's a palindrome which was a easy catch. Palindrome was a term I first heard about in my 7th grade math class where characters read forwards and backwards are the same. The inversion aspect really was quite interesting because it's like rewinding time similar to rewinding a video cassette, but here you are rewinding time and trying to somehow you are looking for a specific scenario and trying to change it within that inversion. For me when I saw this film the complicated aspect was with the time travel aspect by mixing paradoxes where past selves are mirrored but it's altered where the character speaks in his native language. When your past selves is already traveling backwards in time using a time inversion device it has to be a sequence where nothing should change.
You should do one for "Interstellar" too.
I'd love this!
drinking game...have a shot every time he says "physics." you're welcome
Hahaha..Let's do it
You'll be a physicist by the end
Alexandra Prieur I’m in
Cheers
I Ashuuumed this
My takeaway after watching this video:
"So what is entropy??"
Well I'm glad I've got you curious, at least!
If you aren't someone with the time to study the physics, but would love to understand the bigger but more basic scientific picture, like me, then you really only need to differentiate time from entropy and have a rough idea of what reversing an entropy of something is. The basic idea is not how time interacts with the object, but like the fridge example in this video, the act of manipulating the movement, or changes the object experiences within the normal flow of time. This isn't entropy but rather what is happening to the characters in the film, and it is technically incorrect but you should be able to follow the film this way. If anyone thinks I've gotten this the wrong way round, or explained it entirely wrong, please, by all means correct me.
Just came from your Rick & Morty video, and damn, I love this style of videos.
I’m by no means a physicist, but I love experimenting with its principles to try to make sense of this world. Ever since watching Tenet, I’ve only partly been able to explain why it didn’t make sense, and this video really helped me understand the bigger picture; so thanks for that!
If you’ve got some time on your hands, I would recommend you to watch a German show called Dark on Netflix. Not just because of its intriguing science (which, like most shows/movies, is flawed), but also because of its rather insane concept and storyline. You wouldn’t want anything spoiled, so I would just press play and watch it instead of looking it up. Trust me, it’s great, if you can let some of the science slide (just like in Tenet)! (If you decide to watch it, do so with English subtitles and keep the native German dialogue.)
Subscribed!
There is no grandfather paradox; All the events in the movie had already happened.
But what irritates me is the violation of the conservation of energy. When the person enters the entropy inverter he immediately starts moving backwards in time, but after that point in time there is nothing to take his place, he just disappears.
Its as if he just teleports somewhere else . Since he gets inverted again in another place and continues into the future from that point
Even the universe violates the conservation of energy sometimes so I didn't mind that one so much ;) (at least it seems to; it probably doesn't!) But yes, that's another reason why it assumes many-worlds!
@@NitpickingNerd I thought about it and you know? I think you are right!... Because When an object is inverted it has negative mass and negative energy. So basically if the object inverts it would cancel itself out during the time it is inverted. And everything lines up perfectly since both the normal and inverted object always meet at the point of inversion.
@@SilentClouds Well the scarier thought is like the Star Trek theory that teleporter kills the person then recreates them somewhere else, so the question would be did the person they were cease to be alive before they teleported or in tenets case inverted.
Just a thought: “The intrinsic quantum indeterminacy of things produces a blurring . . . which ensures -- contrary to what classic physics seemed to indicate -- that the unpredictability of the world is maintained even if it were possible to measure everything that is measurable . . . The blurring is due to the fact that we are ignorant of the microscopic details of the world.” This is from Carlo Rovelli's book "The Order of Time", 2017. Makes a hell of a lot more sense to me than the block universe concept, so I'm with this young man on the Quantum theory rather than the Relativity theory as primary.
After watching CHRISTOPHER NOLANS film
Common man I think I skipped my PHYSICS classes during my schooling let me go learn the basics and comeback to watch NOLANS films
this movie is possibly the most fascinating concept I've never really explored....
amazing
Thought experiment: What would happen if you were to drop an inverted bullet?
Experiment 1:
You're holding an inverted bullet with your palm facing towards the ground. You let go, opening your hand with your palm still facing the ground. What happens?
Experiment 2:
Same thing but your palm facing sideways towards the wall. What happens?
Don't try to understand it! Feel it! (and lets go to the next scene!)
It will fall normaly. The inverted bullet was not made to fall, only to be caught.
@@youtuberecommended9183 Why would it fall normally? From the inverted bullets perspective, it's flying upwards
Simple1DEA Inverted bullet's dont fly... They are just inverted. Reversed. It would fall because nothing made it to be caught. It was explained at the beginning of the movie.
@@youtuberecommended9183 No but realistically it wouldn't fall downwards because the inverted bullet's timeline wouldn't make sense. If it falls downwards then you've just dropped a regular bullet and you won't be able to tell the difference. Remember cause and effect are flipped. The effect for the bullet is the hand catching it (dropping from regular perspective)... then what would be the cause that pushes the bullet upwards from the table? Which is why I used the phrase flying upwards because there is no force allowing the bullet to go upwards from the table into the hand. The most realistic answer is that this scenario is a paradox unless there are conditions that allow the backwards and forwards flow of time to work ie. an inverted person throwing the bullet upwards to the bottom side of the hand.
Tenet doesn't assume that consciousness is separate from physics. When you invert in the movie, you also invert your consciousness.
From the point of view of the normal universe, an inverted person will have their cognition running backwards.
Suppose Bob gets inverted at the age of 8, and spends 10 years in that state getting an education.
Alice, going forward in time, might watch an 18 year old inverted Bob spend 10 years undo all their homework, unread books, and unwatch videos, and hence unlearning everything they know until inverted Bob gets into a turnstile as a little boy.
The information learned visually in the brain becomes electrical signals that travel to their retinas, and then the information is converted to photons that shoot out at books or screens.
From what I gathered from the film, Nolan took the perceptive definition of “entropy” and applied it to time rather than the physics rendition of it.
Always had a question. If you run time backwards, quantum effects SHOULD be deterministic. Assume event of decay happened and radiated photon. When you run time backwards you'll see photon flying into debris, getting absorbed and debris are welded together in a single atom. That's scenario should be deterministic (at least much more probable considering uncertainty). Is that correct?
I have more questions. I'll ask them if i get answer.
this makes me want to see this movie, great video 👏
Hey thanks!
I like how you jumped back and forth through time during the course of this video. Nice touch ;)
Thank you for your relatively easy explanation for a layman like myself! Do you have any suggestions for basic (entry-level) textbooks on physics that explain the major theories without hurting my brain with equations too much? One point that sometimes (usually when there is alcohol, obviously) comes up in discussions (by either my ignorant self or one of my friends) about QM is that it only appears to be probabilistic, but that it may in fact still be deterministic (even though we do not perceive it to be a such). What would be your take on this?
Also, what is your perspective on the relationship between a 'free will' and 'determinism'? Compatible or simply impossible? (I studied philosophy and I think that I currently agree with Kant's approach to the matter.) :)
As a person studying machine learning and neuroscience.. your interpretation of what conciousness is, is spot on in my opinion!! We might not understand the details but it's quite obvious it's just an emergent phenomenon coming from computations performed by neurons
I want to learn about quantum physics and this video and the movie could really help!
Lord B MIT’s open courseware quantum physics lectures are a great place to start! Then check out quantum field theory if you want to go even deeper :)
Thx
I'm admittedly captivated by films and video games that explore these presumptions about reality itself while merging it with the exposition of geopolitical conflict.
Light in your face, then no light. Back to light. And then no light. Thats no movie trick. You have built yourself an inversion machine. Got ya.
Awakening Got me 😉
Tl;dr
We dont understand enough about time yet to completely disprove the feasibility of tenets plot but from what we currently know it is stretching things a bit, im just grateful such intellectually stimulating cinema still exists. Great vid mate.
I think Mr. Christopher Nolan might have liked to watch “Strawberry Fields Forever” by The Beatles and to play Grid Autosport in which you could undo errors by using ‘Flashback’ option. I hope TENET would not be so complicated as the psyche of a Japanese Schoolgirl.
Now I'm only a third year physicist but my main problem with the movie's physics is that it's applied inconsistently: e.g. sometimes inverted bullets cause wounds to form, but sometimes to heal.
I think what this points to in the film is that there isn't a clear understanding of where this time/entropy reversal starts and stops. The reason for this is that entropy doesn't necessarily increase for a single object (as per your fridge example), but for isolated SYSTEMS, so to talk about a reverse entropy object doesn't really work once it starts interacting with regular matter.
I think you’re overestimating how much ‘only you and your professor understood the film in your screening’. I’m not a physicist, but I understood all of the physics concepts.
The irony is that, as a doctor, my problems lie more with the effects on biology 😂
Yeah I'm much more interested in how aging works in inversion.
similar issue but im a computer engineer and they just kept saying "the algorithm" -just a fancy word for a series of calculations- and then she imbued it into a physical form and split it across 9 places on earth and the whole time im like "what about AI?"
@@JoeyHeartthrob What about AI? Why does that change anything?
Algorithm and AI are not the same. Read Alan Turing's 1948 essay Intelligent Machinery. There's no AI in TENET. There were talking robots in Interstellar, but still not AI as Turing envisaged machine intelligence.
That statement was very cringey. I studied Political Science, and also had no trouble understanding how the movie worked. No need to put yourself on a pedestal.
of all the videos i've seen trying to tie up some loose ends in my mind, now that i watched the movie for a second time, this video is the one that helped me the most, thank u a lot, you got yourself a subscriber :)
you SIR DESERVE THE IRON THRONE
I honesty wish I could sit down with you and talk about the universe for hours. Your theory on what thoughts are really caught me off guard and made me think it's true. Amazing video, easiest like I have ever given. Keep it up man 👌👌👌👌
Physicists : ah yeah, I totally agree
Me : huh 👁️👄👁️
Party king 😂
This is the first time I've been annoyed by commercials interrupting a video I'm watching.
Great explanation my friend, a very fascinating topic indeed!
Nice explanation Clark 👍
haha thanks Ashwin!
This is a great vid! As a lover of film and science, thank you very much. Extremely insightful. Only thing I'd say is that rather than saying "the movie assumes" say "the movie asks us to assume". Since science fiction asks us to suspend disbelief, it's not entirely correct to say the assumptions are held by the movie. It asks us to incorrectly assume those things for the duration of the film.
Thanks so much Shylock! That's a great point and I'll certainly put it that way in future videos :)
The big problem this movie had is how normal objects interacted with inverted objects. When we first see the world going in reverse, the protagonist steps into a puddle. Right before he takes his step, we see the splash of water, then he steps into it. That's perfect, he sees EFFECT then CAUSE since he's in reverse. So a normal person on the outside sees him walking backwards, stepping into the puddle, then splash. CAUSE then EFFECT. So, why do we see through-out the whole movie bullet holes that then get fixed by people shooting in reverse? The people shooting in reverse should see EFFECT then CAUSE, bullet hole then shot (then bullet hole gone) while normal people should always see CAUSE then EFFECT, shot then bullet hole, even if the shot came from someone going in reverse (like the puddle splash).
I think we the spectators are constantly being inverted through out the movie ..the point of view changes constantly toward the most cinematic shot .
Just a theory
@@samphyllobates4765 Yea, there is no rhyme or reason to it, the physics of it make no sense. It's just what looks more cinematic, the rules of this world change based on that.
You forgot to mention that the gun is reversed too when you are shooting in reverse. So that makes sense
@@DonPino596 The gun, not the thing you're shooting at. Not where the bullet hole gets made
@@Taikiji the puddle is not in reverse, so you, reversed, see effect then cause.
You are using a gun in reverse. You and the gun reversed, you shoot and see cause then effect of the reversed gun, so from your pov, you are shooting. Look at the masked man fight scene. There are 2 pov showed, when he becomes the masked man, he is shooting the bullets from his perspective
This video should have ten likes. This is the perfect physics and engineering teacher.
I have a question for you. If time had a beginning, does it have an end?
I wish I knew! I can tell you what our current understanding predicts but there are many holes in our best theories and many things we still don’t know so there’s not much point, because you can be almost certain that it is wrong! I think the only certainty currently in physics is that we have no idea what’s really going on. Time as we know it for our local part of the multiverse may have begun at the Big Bang, but I’m leaning towards this place being infinite. Whatever that means! Where did it come from? How? Why? I wish I knew Daniel!!
Thing about time is that it's not just time, it's space-time, which is described as a geometry.
Geometry itself is way more complicated than just cubes and triangles and what not...the shapes that are possible go beyond a level of understanding that lots of us have trouble understanding. For example, the graphs you see in the stock market can be described by a Strange Attractor in chaos theory which is a geometry (fractals)...which at first hearing this makes no sense...but you can take information that we normally wouldn't think of as being a geometry and describe it as such.
Einsteins revelation was describing space and time as a single geometry of curvature. When you are in space, you are also in time.
So when we ask if it had a beginning and end, it doesn't really make sense to maybe even ask that question...Did the geometry just appear? can it disappear? The answer is probably way more complex than just asking if there was a start and a finish.
Right now physics is in a really exciting place. The uploader of this video mentioned that space time is doomed...this you can do some research on by one of my favorite physicists Nima Arkani Ahmed. This dude knows his shit about physics and the questions you might think to ask get turned on your head and now there's even more stranger questions that might put our questions into perspective.
I think the movie says that time goes backwords in our perspective. Feynman also won a Nobel with Wheeler theory, about One eletron, so.. I wouldnt say they are so wrong... About the another version of themselves, they couldn't touch them (annihilation).
I loved the movie and i want to watch it again... I understood a lot of things because they make a lot of sense, more when they quote the physic theory in the movie. After I watched I was crazy about the Feynman and Wheeler theories.. Very Interesting! Thanks!!
You can tell he's a Physicist because he has glasses.
He's Harry Potter
I don't usually leave a comment only 4 minutes into a 20 minute movie review, but I feel it strangely fitting to do this in a non-linear fashion, being that what I have seen so far is a series of competing and nested conversation/thought loops. If I find out at the end that Nolan had a hand in this I will not be surprised... and... bravo. I think. The wardrobe and hairstyle changes were a nice touch... or a foreshadow... or a reason to fire your continuity director. If the next 16 minutes turn out totally normal I will come back and add on to this review.
EDIT - Okay, it got better and I learned stuff. Thanks.
Just like Tenet, your hair seems to be running forward and backwards :) Good vid btw"!
This is true. Thanks Frederik!
It doesn't say that if they see each other they'll destroy the world, it says if they come into contact they "annihilate" each other. It seems they meant physical 'flesh to flesh' contact. It wasn't particularly clear on the consequence to be fair, but that fits with the rest of the film (such as the end battle, where they see each other's side, and the reverse version of the fight scene between you know who and you know who).
Quick question..so we dont die due to time but because of increase entropy? If that makes any sense.
Essentially yes! But keep in mind entropy wouldn't increase if time didn't pass. So, they are both responsible! In the not so distant future, we may be able to tackle the entropy problem in reference to death
@@DylanJDance I actually hope not. The fact that our lives have to end can drive us to do more than if we knew it would last much longer.
This is the most unexpected awesomeness that showed up in my Search
From one new youtube guy to another, keep it up and subscribed!
Tenet is a movie made by a Vulcan. It´s the kind of movie Spock goes see and enjoys the first time he watches it.
Spock has time travelled a bunch of times so he'd probably nitpick
This was fantastic and I enjoyed it very much! One thing I was hoping you would speak on though was heat death of the universe. I learned about it in 96 when I read Superman/Doomsday in comics. Superman has to take Doomsday to heat death with a time machine because it's the only way he will die permanently. They call it entropy, but they mean heat death.
Heat death and entropy are related but not the same. There’s another theory that heat death will eventually reach a point that is so cold that entropy of the entire universe reverses… it’s my favorite. Because perhaps the end of everything is not the end. 😊
@@TreArtist Yes, that's why I mentioned that when they say "entropy" in the comics as the event that Superman takes Doomsday to in order to end his threat to the universe, they mean the event of universal "Heat Death." As in all subatomic movement has ceased and the entirety of the universe is in true thermal equilibrium.
I once watched a program called "The Sidewalk Astronomer" that chronicled a man that created a blueprint for high powered telescopes that only cost a couple hundred dollars instead of tens of thousands. He said there is also a theory that the universe expands and contracts like the ocean, and that the universe is in an expansion phase and we won't know how long it lasts nor the triggering sequence until it happens, further in favor of your hope that the end is not the end. Love and hope kinfolk, thank you for your comment, I also hope that the end is not the end.
1.Algorithm inverts the Gun and Bullet,
2.Gun has caused the bullet to go forward
3. Hence you can use the same inverted gun and inverted bullet to pull the bullet that's been fired back into its original state,
Now,
How can I handle the inverted bullet since I never have touched it or caused it to change its entropy
And if I have touched the bullet then the bullets new entropy is of this world, and by touching it I have given it new state of entropy (Cause) so I won't be able to have it back in my hand without throwing it on the ground first, and u can only have it back in my hand if me and the bullet have been inverted in the same plane of existence
So the first scene where John picks up the inverted bullet without even contacting it is not possible since he was not the one who gave that bullet an inverted entropy
"The Scientist" who was with John had changed the bullets entropy by handling the bullet first and if the TeneT rule is applied here then it says that the movement of time is exactly the same in both the worlds,
If you are inverting yourself at the date March 31st then it'll take you exactly 10 days to reach the date March 21st and vice versa so there are no temporal jumps,
So going forward takes the same amount of time as going backwards,
So if you have moved forward then in the same plane if you wish to go backwards you'll take the same path, this relates to the objects not any living creature,
So if the doctor has put the bullet on the table then only she should be able to pick it up in reverse
And once if the object's entropy is changed, then the object acquires a new state of entropy and at that very moment the object losses it's ability to travel in reverse entropy stage,
They didn't explain it, they said don't try to understand it, feel it,
And that's my argument if everything is physical then how can a mental state of another living subject change the position of a physical object
And if this is the case then I should be able to pull anything to my self if I'm in an inverted world like telekinesis
His mental state I don't think was the driving force, he was able to pick i up because to the bullet he dropped it. It was on the table because of him. That's why he questioned free will. Now he didn't invert it... necessarily but I think the term inversion is confusing here because while we call the bullet inverted, we don't actually know that it is, we just know that it is to us. It may be going to a turnstyle in our past and for all we know it might have come from a turnstyle in our future, but it could just as likely have been constructed by our counterparts moving "backward" from the future, and will eventually decay in our past, without having gone through any sci fi inversions.
Your dual world theory isn't a proper understanding of the mechanics of this movie. From the reversed bullet's perspective, it is traveling backwards in time, so from its perspective, it is dropped by the protagonist in the scene you are referring to. It was inverted in the future.
@@comterrier Yes but the point is, if the bullet is processed by the machine and has its entropy inverted then all of its movements should be in reverse, so if the scientist pulls the bullet out and handles it then it gives the Bullet a new state of entropy, and if there's a new state then the machine failed on a quantum scale, and nice the bullet has the regular world entropy and should not be able to flow in reverse, Scientist moved it forward so now it's in forward motion, so John shouldn't be able to catch it, the Bullet should not be able to go in reverse now, unless it's in a quantum State where there are two bullets of the same mass existing in the same plane but that also can't happen since they'll suck eachother up and annihilate itself into a singularity (Man of Steel, destruction of world engine). So the science and logic of the Movie Universe fails here.
@@mymyscellany if the machine is inverting any objects entropy then the object should not be able to move forward in real time, but when the Scientist touches it and puts it on the table, that's a forward movement and magically John is able to make it go in reverse by just "Feeling" it because the cause didn't came at that point before he thought he had dropped it, thus in an inverted world if I "Feel" that I threw as stone somewhere that is in my sight I should be able to call it back in my hand by telekinesis,
@@HariharThaker it's more likely "fate" than telekinesis. If it is telekinesis then summoning bullets to the gun will be nonsensical. If "fate", then the bullet & the casing in the gun chamber exert a "force" that nudge the actor to align in the correct position so that the bullet recombine.
Aside from the great presentation, the fact that you're wearing a neck tie made me pay attention to the entire lecture/explanation. Harkens me back to my college days, except we weren't discussing the scientific merits of a movie.
Got a weird feeling that this one is gonna blow up.
Eugene Rider Thanks for the kind words Eugene!
I’m sorry if this has already been posited. I automatically assumed their consciousnesses were moving in reverse with them. The words that people moving forward hears were in reverse, so I took it as relatively everything attached to the matter moving in reverse was also moving in reverse. That explains why perspective changed in the movie depending on what character was being followed.
Entropy must always increase in an isolated system, now Muse finally makes sense.
You say that the movie Tenet suggests the Many-World interpretation. I disagree.
The characters don't rule it out, but the members of Tenet believe there is only 1 universe and they try to prevent paradoxes.
In a sense that is not exactly the same as directly rejecting the many-worlds interpretation, but only because it is framed differently and doesn't take aim at the many-worlds interpretation..
They say that "What happened, happened" and "If that universe is possible, we aren't living it in." They doubt that other universe other than the one they already know are possible (or at the very least, they deem them irrelevant).
Neil mentions the idea of multiple universes, but only to suggest that it would be hard to know if you were in a different one.
Hi mate. Watched the movie.Got decent understanding of physics (not degree level).Generally I'm not ocd about science in movies... But I got so upset during this movie. When at the beginning the scientist lectured the guy about inversion explaining that the whole thing it's like rewinding a tape I immediately thought... Gravity mate.. Where do you put gravity? I would be glad if you could explain if gravity is also a problem as my gut suggested.
Haha I mean nobody currently understands how gravity fits together with the other 3 fundamental forces of nature (referring to the standard model of particle physics) so I don't blame him for just pretending like it doesn't exist! Gravity is still a complete mystery too. So, how gravity would be affected if we reversed time (even just for an object) which is also a great mystery of physics, I have no idea!!! No one can tell you that if they are being honest, they can only guess. But yes, gravity is a big big problem in the movie and an even bigger one in reality!
In Einstein's picture, gravity is simply the curvature of spacetime, not a force. Yet the standard model doesn't agree and it is our best current understanding of reality in physics. We have some problems in physics!
Hi there, I share the same feelings of ocd, but only towards Nolan films haha. And about gravity, I think I have an answer. Gravity in the movie isn't affected because only the objects are inverted. The inverted objects are seemingly made of antimatter particles (an exact copy of the original one, just anti), so almost all the mass is still the same. Since gravity is affected by mass (more precisely energy), nothing "much" changes about gravity. This does open up questions about how inverted objects don't simply annihilate on creation or maybe sometime later in the movie. Does anyone have an answer for this? I'm curious to know as well.
I see all the clever points you have made... I was puzzled by the physical interactions with inverted people to begin with!.. How can you jump back on your feet when your (not inverted) counterpart has knocked you on the floor? .. This completely seems to defy the laws of gravity (at least for me).. I mean.. What a non-expert sees before trying to grasp entropy etc.. (So casually explained by the protagonists btw) is that gravity causes you to fall on the floor after grappling and tripping.. Isn't gravity acting on you when you are inverted? If it was.. What would make you jump back so effortlessly when you are lying on the floor? This seems so mad to me that I keep thinking I got it wrong and this sort of interaction with inverted people is possible.. because how can someone make a movie of this kind addressing such complex physical matters without making sure that basic things make sense.. Without being certain that fights between inverted selves and not inverted selves are somewhat plausible ?!?..
Definitely a movie to be consumed more than once. The physics were beyond me, but I still really liked it. I would have appreciated talking to a physicist after watching, so your breakdown here was really interesting.
Why did they have to go to oslo airport to use the turnstyle if they had it right where Kat was shot?
Because it was not determined to happen. Free will is just an illusion.
he has to do it to preserve the past. But weirdly he didn't know his own past! his partner Neil knew our hero fought with his future self but never tell our hero what to do, he just did it own his own.
Apparently I read that they couldn’t use it since Sator was already using that turnstile going into the past
@Tanhausr I agree, 👍 very logical to think Oslo is the only turnstile known in the past 👍, but TENET also have turnstiles for their troops.
@Tanhausr this is the best explanation i got. Thanks so much.
So if all action is predetermined this video isn't a jumble edit of jump cuts, it's perfectly editted.