{C : Type u} →
  [inst : CategoryTheory.Category.{v, u} C] →
    {A B : C} →
      {f g : A ⟶ B} →
        {motive : CategoryTheory.IsReflexivePair f g → Sort u_1} →
          (t : CategoryTheory.IsReflexivePair f g) →
            ((common_section' :
                  ∃ s,
                    CategoryTheory.CategoryStruct.comp s f = CategoryTheory.CategoryStruct.id B ∧
                      CategoryTheory.CategoryStruct.comp s g = CategoryTheory.CategoryStruct.id B) →
                motive ⋯) →
              motive t