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Adrien Vannson 2022-05-10 15:15:59 +02:00
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(A -> B -> C) -> (A -> B) -> A -> C (A -> B -> C) -> (A -> B) -> A -> C
intro f.
intro g.
intro a.
cut B -> C.
intro h.
apply h.
apply g.
assumption.
apply f.
assumption.