If \( p \) and \( q \) are two statements, then \( (p \Rightarrow q) \Leftrightarrow(\sim q \Rig...

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If \( p \) and \( q \) are two statements, then \( (p \Rightarrow q) \Leftrightarrow(\sim q \Rightarrow \sim p) \) is a
(A) contradiction
(B) tautology
(C) neither (a) nor (b)
(D) none of the above
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