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