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18 lines
423 B
18 lines
423 B
Translation: \\
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$p:$ \quad I press the button. \\
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$q:$ \quad The window is open.
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\begin{tabbing}
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If I press the button, the window opens. \quad \= $p \imp q$ \\
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I pressed the button. \> $p$ \\
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The window is open. \> $q$
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\end{tabbing}
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\emph{Sequent:} \quad $p \imp q, p \vdash q$ \\
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This sequent is provable.
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\begin{logicproof}{1}
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p \imp q & \prem \\
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p & \prem \\
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q & $\impe 1,2$
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\end{logicproof}
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