∀ {C : Type u_2} [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.Limits.HasZeroMorphisms C]
  {D : Type u_3} [inst_2 : CategoryTheory.Category.{u_1, u_3} D] [inst_3 : CategoryTheory.Limits.HasZeroMorphisms D]
  (F : CategoryTheory.Functor C D) [inst_4 : F.IsEquivalence] {X Y : C} {f : X ⟶ Y}
  (hf : CategoryTheory.NormalMono (F.map f)),
  CategoryTheory.Limits.ReflectsLimit
    (CategoryTheory.Limits.parallelPair
      (F.preimage
        (CategoryTheory.CategoryStruct.comp CategoryTheory.NormalMono.g
          (F.objObjPreimageIso (CategoryTheory.NormalMono.Z (F.map f))).inv))
      0)
    F