You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
14 lines
349 B
14 lines
349 B
This sequent is not provable.
|
|
|
|
Model $\mathcal{M}$:\\
|
|
\begin{minipage}{0.2\textwidth}
|
|
\begin{align*}
|
|
\mathcal{A} =& \; \{ a,z \}\\
|
|
P^\mathcal{M} =& \; \{ a,z \}\\
|
|
Q^\mathcal{M} =& \; \{ a\}
|
|
\end{align*}
|
|
\end{minipage}\\
|
|
|
|
$\mathcal{M} \models \exists x \; P(x) \imp Q(x)$\\
|
|
$\mathcal{M} \models \lnot Q(z)$\\
|
|
$\mathcal{M} \nmodels \lnot P(z)$
|