4 lines
164 B
Text
4 lines
164 B
Text
Set: pp::colors
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Set: pp::unicode
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Proved: T
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theorem T (a b : Bool) (H : a ∨ b) (H::1 : ¬ b) : a := or_elim H (λ H : a, H) (λ H : b, absurd_elim a H H::1)
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