{C : Type u} →
  [inst : CategoryTheory.Category.{v, u} C] →
    {F : CategoryTheory.Functor C C} →
      {motive : CategoryTheory.Endofunctor.Algebra F → Sort u_1} →
        (t : CategoryTheory.Endofunctor.Algebra F) →
          ((a : C) → (str : F.obj a ⟶ a) → motive { a := a, str := str }) → motive t