What and Define Negation

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Let p be a proposition. The negation of p, denoted by $\neg p$ (also denoted $\bar{p}$ ), is the statement "It is not the case that $p^{\prime}$ , the proposition $\neg p$ is read "not $\mathrm{p}$ ". The truth value of the negation of p, $\neg p$ is the opposite of the truth value of p.

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