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9 lines
188 B
9 lines
188 B
This sequent is provable.
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\begin{logicproof}{2}
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p & prem. \\
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q & prem. \\
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r & prem. \\
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q \land r & $\land$i 2,3 \\
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p \land (q \land r) & $\land$i 1,4
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\end{logicproof}
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