{α : Type u_1} →
  (motive : (x : Quiver.SingleObj α) → Quiver.Path (Quiver.SingleObj.star α) x → Sort u_2) →
    (x : Quiver.SingleObj α) →
      (x_1 : Quiver.Path (Quiver.SingleObj.star α) x) →
        (Unit → motive (Quiver.SingleObj.star α) Quiver.Path.nil) →
          ((x b : Quiver.SingleObj α) →
              (p : Quiver.Path (Quiver.SingleObj.star α) b) → (a : b ⟶ x) → motive x (p.cons a)) →
            motive x x_1