3. We want to find S so ((A = B) A B) = S is a tautology. A B(A→ B) ^ B TT TF FT S ((A = B) ^ B) = S FF (a) Explain why S can't be A. (b) Explain why S can't be ¬A. (c) Find S that makes a tautology. (d) Explain why, in this case, the statement S isn't useful. (If you wrote out simple statements A and B, the answer to this question is obvious).

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A: Thanks for the question :)And your upvote will be really appreciable ;) For Tautology, output of…

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Q: Is it tautology or not?

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