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4 lines
265 B
4 lines
265 B
Given a formula $\varphi$ in propositional logic, we say that $\varphi$ is
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\emph{satisfiable} if it has a model in which is evaluates to \emph{true}.
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We say that $\varphi$ is
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\emph{unsatisfiable} if there is no model under which $\varphi$ evaluates to \emph{true}.
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