∀ {C : Type u_4} {D : Type u_2} [inst : CategoryTheory.Category.{u_3, u_4} C]
  [inst_1 : CategoryTheory.Category.{u_1, u_2} D] [inst_2 : CategoryTheory.Limits.HasZeroMorphisms C]
  [inst_3 : CategoryTheory.Limits.HasZeroMorphisms D] {S : CategoryTheory.ShortComplex C} (h : S.LeftHomologyData)
  (F : CategoryTheory.Functor C D) [inst_4 : F.PreservesZeroMorphisms]
  (hi : CategoryTheory.Limits.IsLimit ((CategoryTheory.Limits.KernelFork.ofι h.i ⋯).map F)),
  hi.lift (CategoryTheory.Limits.KernelFork.ofι (S.map F).f ⋯) = F.map h.f' →
    CategoryTheory.CategoryStruct.comp
        ((CategoryTheory.Limits.parallelPair (hi.lift (CategoryTheory.Limits.KernelFork.ofι (S.map F).f ⋯)) 0).map
          CategoryTheory.Limits.WalkingParallelPairHom.left)
        (CategoryTheory.Iso.refl
            ((CategoryTheory.Limits.parallelPair (hi.lift (CategoryTheory.Limits.KernelFork.ofι (S.map F).f ⋯)) 0).obj
              CategoryTheory.Limits.WalkingParallelPair.one)).hom =
      CategoryTheory.CategoryStruct.comp
        (CategoryTheory.Iso.refl
            ((CategoryTheory.Limits.parallelPair (hi.lift (CategoryTheory.Limits.KernelFork.ofι (S.map F).f ⋯)) 0).obj
              CategoryTheory.Limits.WalkingParallelPair.zero)).hom
        ((CategoryTheory.Limits.parallelPair (F.map h.f') 0).map CategoryTheory.Limits.WalkingParallelPairHom.left)