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Problem 1.14 Show the following: (a) pAt =p, where t is a tautology. (b) pic=c, where c is a contradiction. (c) ~t=c and ~c=t, where

Problem 1.14 Show the following: (a) pAt =p, where t is a tautology. (b) pic=c, where c is a contradiction. (c) ~t=c and ~c=t, where t is a tautology and c is a contradcition. (d) p V p = p and pap=p

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