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11 lines
261 B
11 lines
261 B
This sequent is provable.
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\begin{logicproof}{2}
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p \land q & \prem \\
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q \imp \lnot \lnot r & \prem \\
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q & $\ande{2} 1$\\
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\lnot \lnot r & $\impe 2,3$ \\
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r & $\negnege 4$ \\
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p & $\ande{1} 1$ \\
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p \land r & $\andi 6,5$
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\end{logicproof}
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