∀ {C : Type u_1} [inst : CategoryTheory.Category.{v_1, u_1} C] [inst_1 : CategoryTheory.Limits.HasPullbacks C] {X : C}
  {R S : CategoryTheory.Over X},
  (CategoryTheory.SemiCartesianMonoidalCategory.snd R S).left = CategoryTheory.Limits.pullback.snd R.hom S.hom