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Determine Whether the Following Argument Is Valid prqr¬(pq)¬r\begin{array} { l } p \rightarrow r \\q \rightarrow r \\\neg ( p \vee q ) \\\hline \therefore \neg r \end{array}

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Determine whether the following argument is valid: prqr¬(pq)¬r\begin{array} { l } p \rightarrow r \\q \rightarrow r \\\neg ( p \vee q ) \\\hline \therefore \neg r \end{array}

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