match Fin.exists_eq_false_of_all_eq_false h with
| ⟨i, h⟩ => exists (Finite.get α i)
α✝ : Type ?u.1482
inst : Finite α✝
α : Type u_1
inst✝ : Finite α
p : α → Bool
h : Finite.all p = false
⊢ ∃ x, p x = false
no goals