∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] [inst_1 : CategoryTheory.MonoidalCategory C] {X : C}
  [inst_2 : CategoryTheory.HasLeftDual X], (ᘁCategoryTheory.CategoryStruct.id X) = CategoryTheory.CategoryStruct.id ᘁX