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11 lines
341 B
11 lines
341 B
\begin{logicproof}{2}
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\lnot \lnot p \land \lnot \lnot q & \prem \\
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r \land s & \prem \\
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\lnot \lnot p & $\ande{1} 1$ \\
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p & $\lnot \nege 3$ \\
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r & $\ande{1} 2$ \\
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s & $\ande{2} 2$ \\
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\lnot \lnot s & $\negnegi 6$ \\
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p \land r & $\andi 4,5$ \\
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(p \land r) \land \lnot \lnot s & $\andi 8,7$
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\end{logicproof}
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