{C : Type u} →
  [inst : CategoryTheory.Category.{v, u} C] →
    {W W' : CategoryTheory.MorphismProperty C} →
      {motive : W.HasOfPostcompProperty W' → Sort u_1} →
        (t : W.HasOfPostcompProperty W') →
          ((of_postcomp :
                ∀ {X Y Z : C} (f : X ⟶ Y) (g : Y ⟶ Z), W' g → W (CategoryTheory.CategoryStruct.comp f g) → W f) →
              motive ⋯) →
            motive t