(4)2. Identify a single logical equivalence or rule of inference which can be used to show that the conclusion follows from the given premises: а. 1. (q a s) →-p 2. Therefore, q →¬p b. 1. (р Ө-q) ->r 2. r → (s a t) 3. Therefore, (p ¬q) → (s ^ t) c. 1. р — (qvr) 2. ar 3. Therefore, p→ q

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