∀ {C : Type u_2} [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.Preadditive C]
  {S : CategoryTheory.ShortComplex C}
  (hp : CategoryTheory.Limits.IsColimit (CategoryTheory.Limits.CokernelCofork.ofπ S.g ⋯)),
  hp.desc (CategoryTheory.Limits.CokernelCofork.ofπ S.g ⋯) =
      CategoryTheory.CategoryStruct.id (CategoryTheory.Limits.CokernelCofork.ofπ S.g ⋯).pt →
    CategoryTheory.Mono (hp.desc (CategoryTheory.Limits.CokernelCofork.ofπ S.g ⋯))