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Memory Based GATE DA 2024 | Question: 33

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Which of the following are tautologies?
 
  1. \(x \land \neg y \Rightarrow y \rightarrow x\)
  2. \(\neg x \land y \Rightarrow \neg x \rightarrow y\)
  3. \(x \land \neg y \Rightarrow \neg x \rightarrow y\)
  4. \(\neg x \land y \Rightarrow y \rightarrow x\)

2 Answers

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Answer: A,B and C
For Implication x -> y at only one condition is False when x-True and y- False.

For Tautology at every condition should be true.

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