6 lines
229 B
Text
6 lines
229 B
Text
Set: pp::colors
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Set: pp::unicode
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Defined: f
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Proved: T
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theorem T (a b : Bool) : a ∨ b ⇒ f b ⇒ a :=
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Discharge (λ H : a ∨ b, Discharge (λ H::1 : f b, DisjCases H (λ H : a, H) (λ H : b, AbsurdElim a H H::1)))
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