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16 lines
401 B
16 lines
401 B
\begin{logicproof}{2}
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p \lor q & \prem \\
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p \implies r & \prem \\
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\lnot s \implies \lnot q & \prem \\
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\begin{subproof}
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p & \assum \\
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r & $\impe 4,2$ \\
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r \lor s & $\ori{1} 5$
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\end{subproof}
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\begin{subproof}
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q & \assum \\
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s & $\MT 3,7$ \\
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r \lor s & $\ori{2} 8$
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\end{subproof}
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r \lor s & $\ore 1,4-6,7-9$
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\end{logicproof}
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