SOLUTION: Proving Logical truths: [~y⊃(~f∨s)]≡[~f∨(y∨s)] How do I prove this conditional statement using Indirect Proof method(which I tried and ended at 2

Algebra ->  Proofs -> SOLUTION: Proving Logical truths: [~y⊃(~f∨s)]≡[~f∨(y∨s)] How do I prove this conditional statement using Indirect Proof method(which I tried and ended at 2      Log On


   



Question 734973: Proving Logical truths:
[~y⊃(~f∨s)]≡[~f∨(y∨s)]
How do I prove this conditional statement using Indirect Proof method(which I tried and ended at 20 lines with the problem still unsolved) or conditional Proof method. I know I need to use the conditional Method but I can't figure out where to begin. I know I need to assume the first part....
[~y⊃(~f∨s)
Not sure where to go next.

Answer by lynnlo(4176) About Me  (Show Source):