Question #308312

[¬p ∧(∨ q)]→q


1
Expert's answer
2022-03-09T15:27:55-0500

Solution


To prove


[p(pq)]q[¬p ∧(p ∨ q)]→q


¬[¬p(pq)]q¬[¬p ∧ (p ∨ q)] ∨ q


(¬¬p¬(pq))q(¬¬p ∨ ¬(p ∨ q)) ∨ q


p(¬p¬q))qp ∨ (¬p ∧ ¬q)) ∨ q


((p¬p)(p¬q))q((p ∨ ¬p) ∧ (p ∨ ¬q)) ∨ q


(T(p¬q))q(T ∧ (p ∨ ¬q)) ∨ q


(p¬q)q(p ∨ ¬q) ∨ q


p(¬qq)p ∨ (¬q ∨ q)


pTp ∨ T


TT




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