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Miscellaneous Exercise 1 · Q173

Q.Determine the truth values of p and q in the following case: (p∨q)(p \lor q) is T and (p∨q)→q(p \lor q) \to q is F

Maharashtra MsbshseTextbookSubjectiveImportance★★★★★
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For (p∨q)→q to be F, we need the antecedent (p∨q) to be T and the consequent q to be F (a conditional is false only when the antecedent is T and consequent is F). This already gives q=F.

Now use (p∨q)=T with q=F: p∨F=T forces p=T. …

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