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Which one of the following statements is not a tautology?
(1) $(p \vee q) \to (p \vee (\sim q))$
(2) $(p \wedge q) \to (\sim p) \vee q$
(3) $p \to (p \vee q)$
(4) $(p \wedge q) \to p$
Type: MCQ
(1) $(p \vee q) \to (p \vee \sim q)$ is not always T. Others are tautologies.
BETA
