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10 lines
191 B
10 lines
191 B
\begin{logicproof}{1}
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p \imp q & \prem \\
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q \imp r & \prem\\
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\begin{subproof}
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p & \assum\\
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q & $\impe 3,1$\\
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r & $\impe 4,2$
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\end{subproof}
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p \imp r & $\impi 3-5$
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\end{logicproof}
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