\( \sim(p \leftrightarrow \sim q) \) is equivalent to (1) \( p \leftrightarrow q \) (2) \( p \le...

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\( \sim(p \leftrightarrow \sim q) \) is equivalent to
(1) \( p \leftrightarrow q \)
(2) \( p \leftrightarrow \sim q \)
(3) \( \sim p \leftrightarrow q \)
(4) \( \sim(p \leftrightarrow q) \)
\( \mathrm{P} \)
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