Replacement Rules 2

[@samidib10]

absolute GOD SEND. You have saved my Modern Logic grade and it was extremely important for me to pass for my GPA. Thank u so much for making videos out of what u love to do even though the views can be low. This video really helped so much, words cant describe it thank u thank u thank u

[@ALittleBitofPhilosophy]

Hi Sami. Thanks for the kind words. I'm so glad you found the video helpful in your studies. Keep it up!

[@celinegrasdal8858]

Thank-you. Both this video and the previous video explained what my reading assignments could not!

[@ALittleBitofPhilosophy]

Hi Celine. I'm glad you found this video helpful. It's nice to get positive feedback. Keep learning!

[@paulcarello6390]

In reference to the Tautology Replacement Rule: p :: (p v p) :: (p . p)
one could argue that ALL replacement rules are tautologies:
For example, the Transposition Replacement Rule, (p ⊃ q) :: (~q ⊃ ~p), can be rewritten as
(p ⊃ q) ⊃ (~q ⊃ ~p) .... (1)
The truth table for (1) above confirms that the Transposition Replacement Rule is also a tautology.
Given that all replacement rules are tautologies, why is the name reserved for one specific replacement rule ---- viz p :: (p v p) :: (p . p) ?

[@jmike2039]

I've wondered this exact same thing and never got an answer.

[@kamwefu4921]

...Read the discussion on Inductive Inference in Unit 5 of the module, and develop an essay serving as your presentation on Causation and Causal Inference..
How I answer this?