Determine if a Conclusion is Valid or Invalid using a Truth Table-3 Statements

This video shows an example of how to determine if a conclusion made from two premises is valid or invalid using a truth table. To be valid the end column must be a tautology, when means all truth values are true.

[@scarlettania2598]

thank you, it really helps me. my lecturer didnt really explain much. tomorrow is my exam, goodluck to me.

[@el1934]

Thanks, I finally get it. When I constructed the truth table, I missed the tautology part and I thought there's something wrong with my sequent or truth table. My lecturer and tutors weren't being helpful at all. I was just told that I still had a misunderstanding but they refused to answer my question. It's really annoying. I am so glad I found your vid.

[@MathandStatsHelp]

Glad the video helped

[@sundusabdala547]

Thanks you helped me alot god bless you❤

[@apurvavedpathak9009]

Thank you so much
You make its easy to understand once again thank you again

[@parneetkaur1946]

U seriously saved me from getting to be fail in my exam , oh thank u soooooooooooooooo much 🥺🥺🥺🥺🥺

[@MarcelaGrey-sg5vr]

Hold on, if T followed by F is the only time the conclusion is False, why 5:28 seconds into the video do you list F followed by T as False? Im so confused.

[@A__GARV_SAXENA]

Thank you maam
You explained very well

[@LHTCyke]

Thank you, this helps a lot.

[@josephurueyo.4432]

Thanks

[@Lukemon007]

Thanks!

[@KingJohnTX]

Would two false premises making a false conclusion be valid?

[@stellameek2006]

Thank you for this

[@MathandStatsHelp]

You're welcome

[@renexkayed.barranco7506]

thank you!

[@kccastillo5340]

hi i just want to clarify so if all of the results are true then the statement is valid but otherwise it's false (one or more false in the result)? your response will help so much. tyia!❤️

[@MathandStatsHelp]

Yes, if you end with a tautology (all true), then it is valid. If there are any false statements, it is invalid, because it's not always true.

[@betielyonas8649]

thank you very much

[@varnita4455]

Thanks.

[@yuju1195]

We're also learning this right now and I'd like to ask something if its okay. What if the problem was (p->q), (r->s) .. then the conclusion is (p->s).. i think this is invalid but I'm not really sure and can the truth table be used as proof if it is indeed invalid?? Also, do you know what this kind of problem is? Thanks.

[@roronoa_zoro]

Still need help with this? 💀

[@turquoise7374]

I want to ask one of our proposition was false do i start with a t t f or not?

[@heinminzaw6932]

For 3 statement , Can i write at second column one true and one false alternate, at final column two true and two false alternate?

[@MathandStatsHelp]

The reason it's set up the way it is makes it easier to remember the pattern, grade the work, and make sure all combinations of TF are represented. It might end up with a different pattern of T/F at the end, and if you're using an online grading system, it might be marked incorrect.

[@Ramithanguy]

Amazing thanks

[@MathandStatsHelp]

You're welcome!

[@satyaprakashsingh952]

Nice explanation

[@MathandStatsHelp]

Thank you!

[@uzoigwefavour3023]

What If we have false tautology, does it mean the argument is valid

[@MathandStatsHelp]

It's only valid if it's always true. It it is always false, then it's never true.

[@angelahodgin6257]

Very lengthy but nice explaining thank you!

[@amarpathshala-7058]

Is it fallacy?

[@Hiyabasumataryvlog]

CFA bangcn SW confuse klmw

[@quamialewis4236]

Thank you so much