∀ {R : Type u1} [inst : CommRing R] {M : Type u2} [inst_1 : AddCommGroup M] [inst_2 : Module R M]
  (Q : QuadraticForm R M) (d : Module.Dual R M) (x : M),
  (CliffordAlgebra.contractRight ((CliffordAlgebra.ι Q) x)) d = (algebraMap R (CliffordAlgebra Q)) (d x)