Thread: Sheffer stoke help please

got stuck on the second part of this question.

show that
P Λ Q ≡ (P l Q)l(P l Q)
≡ ~((P l Q)Λ(P l Q))
≡~ (P l Q)
≡ ~(~(P l Q)
≡ P Λ Q

use part 1 as example to write P Λ (~Q ∨ R) using only Sheffer stokes?

Originally Posted by demarkus

got stuck on the second part of this question.
use part 1 as example to write P Λ (~Q ∨ R) using only Sheffer stokes?

This is a real mess.

We use



I hope this helps.