Practice Problems - Rules of Implication

Professor Thorsby goes over some practice problems using the rules of implication.

[RyanMartin-lk]

Mark, you are the GOAT! I am watching these videos ten years later and they are still the most helpful things on the internet

[fondizzie]

Thank you Mr Thorsby! I got a 98 on my exam thanks to you, class average was 67!

[patricialiggins]

I did this exact thing with a same problem on the same application that you used and got the answer wrong. I am extremely frustrated because I don't understand this at all and I am on the last day of class.

[iKayorei]

I used your video to study for my final. A little unorganized, but I learned a lot.

[MagicianMarcus]

Thank you, your videos are extremely helpful.

[bonniejosephine]

this was so useful for my class!! thank you!!

[Guywithair]

15minutes is where we go past the first 4 rules of implications. This is where I depart. Only working on first 4 at the moment.

[kawaii_hawaii]

Hello thanks for your video, do you have a hint for me how to prove ~A↔ B, ~B ↔ C, ~C ↔ A ╞ λ ? I already used the Df rule but I still cannot see how to show that an absurdity follows... Help would be much appreciated... Thank you!

[MattS-lcfd]

How about 9. N ⊃ O  2, 8 HS10.  ˜N    6, 9 MT

[simranjitkainth]

can you help me in this one 2. ∼G ⊃ (∼U ⊃ J) (G ∨ U) ∨ J we need to show equivalence in SD+