exact absurd (hb rfl) Bool.noConfusion
C : ℕ → Sort u
z : C 0
o : (n : ℕ) → C (2 * n + 1)
e : (n : ℕ) → C (2 * n + 2)
n : ℕ
hb : 0 = 0 → false = true
a✝ : bit false 0 = 0 → C (bit false 0)
⊢ C (bit false 0)
no goals