∀ {α : Type u_1} (motive : List α → Sort u_2) (a : α) (as : List α) (h_1 : Unit → motive [])
  (h_2 : (a : α) → (as : List α) → motive (a :: as)),
  (match a :: as with
    | [] => h_1 ()
    | a :: as => h_2 a as) =
    h_2 a as