19 lines
294 B
Text
19 lines
294 B
Text
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778.hlean:7:4: proof state
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⊢ bnot (bnot ff) = ff
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⊢ bnot (bnot tt) = tt
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⊢ bnot (bnot ff) = ff
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⊢ bnot (bnot tt) = tt
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⊢ bool.cases_on (bnot ff) ?M_1 ?M_2 = eq.ap bnot (bool.cases_on ff ?M_3 ?M_4)
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⊢ bool.cases_on (bnot tt) ?M_1 ?M_2 = eq.ap bnot (bool.cases_on tt ?M_3 ?M_4)
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