∀ {α : Sort u_2} (motive : ℕ → α → Sort u_1) (k : ℕ) (a : α) (h_1 : (a : α) → motive 0 a)
  (h_2 : (k : ℕ) → (a : α) → motive k.succ a),
  (match k.succ, a with
    | 0, a => h_1 a
    | k.succ, a => h_2 k a) =
    h_2 k a