match x.any (BEq.beq a) with
| true => simp only [Bool.true_or, false_and]
| false => simp only [Bool.false_or, true_and]
α : Type u
β : Type v
inst✝ : DecidableEq α
a : α
x : Array α
⊢ (any x (BEq.beq a) 0 (size x) || anyPair x BEq.beq 0 (size x)) = false ↔
    any x (BEq.beq a) 0 (size x) = false ∧ anyPair x BEq.beq 0 (size x) = false
no goals