∀ {C : Type u}
  {motive :
    {X Y : CategoryTheory.FreeMonoidalCategory C} →
      (a a_1 : X.Hom Y) → CategoryTheory.FreeMonoidalCategory.HomEquiv a a_1 → Prop}
  {X₁ Y₁ X₂ Y₂ : CategoryTheory.FreeMonoidalCategory C} (f : X₁.Hom Y₁) (g : X₂.Hom Y₂),
  CategoryTheory.FreeMonoidalCategory.HomEquiv.below ⋯