(C : Type u) →
  (X : CategoryTheory.FreeMonoidalCategory C) →
    (n : CategoryTheory.FreeMonoidalCategory.NormalMonoidalObject C) →
      CategoryTheory.MonoidalCategoryStruct.tensorObj (CategoryTheory.FreeMonoidalCategory.inclusionObj n) X ≅
        CategoryTheory.FreeMonoidalCategory.inclusionObj (X.normalizeObj n)