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10 lines
203 B
10 lines
203 B
\begin{logicproof}{1}
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\neg p \imp \lnot q & \prem \\
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q & \prem\\
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\begin{subproof}
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\lnot p & \assum \\
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\lnot q & $\impe 3,1$\\
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\bot & $\nege 2,4$
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\end{subproof}
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p & $\PBC 3-5$
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\end{logicproof}
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