Question: For any statements p, q, prove that (a) (p q) ( p q) (b) (p q) ( p

For any statements p, q, prove that
(a) ¬ (p ↑ q) ⇔ (¬ p ↑ ¬ q)
(b) ¬(p ↑ q) ⇔ (¬ p ↑ ¬ q)

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