∀ {V : Type u_2} [inst : Quiver V] {b : V} (motive : (x : V) → Quiver.Path b x → Prop) (x : V) (x_1 : Quiver.Path b x),
  (∀ (a : Unit), motive b Quiver.Path.nil) →
    (∀ (c b_1 : V) (q : Quiver.Path b b_1) (e : b_1 ⟶ c), motive c (q.cons e)) → motive x x_1