exact Or.inl ⟨a⟩
α : Type
c✝ : Clause α
x : List (Clause α)
ih : Nonempty α ∨ ∃ n, x = List.replicate n []
a : α
b : Bool
c : List (α × Bool)
⊢ Nonempty α ∨ ∃ n, ((a, b) :: c) :: x = List.replicate n []
no goals