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5 lines
352 B
5 lines
352 B
\item For each of the formulas in predicate logic below, find a model that satisfies the formula and one that does not. Draw a syntax tree and state all free variables while solving this task.
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\begin{enumerate}
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\item $\neg\forall x ((P(x) \implies P(y)) \land P(x))$
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\item $\forall x \exists y (P(x,y) \land \neg P(f(x),f(y)))$
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\end{enumerate}
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