∀ {C : Type u_2} [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.Preadditive C]
  {S : CategoryTheory.ShortComplex C} (hi : CategoryTheory.Limits.IsLimit (CategoryTheory.Limits.KernelFork.ofι S.f ⋯)),
  hi.lift (CategoryTheory.Limits.KernelFork.ofι S.f ⋯) =
      CategoryTheory.CategoryStruct.id (CategoryTheory.Limits.KernelFork.ofι S.f ⋯).pt →
    CategoryTheory.Epi (hi.lift (CategoryTheory.Limits.KernelFork.ofι S.f ⋯))