Kind/book/Bool.lemma.notnot.kind2
Victor Taelin 6b764e9522 tmp
2024-02-10 09:57:13 -03:00

7 lines
188 B
Plaintext

Bool.lemma.notnot
: ∀(b: Bool)
(Equal Bool (Bool.not (Bool.not b)) b)
= λb (~b λx(Equal Bool (Bool.not (Bool.not x)) x)
(Equal.refl Bool Bool.true)
(Equal.refl Bool Bool.false))