∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] [inst_1 : CategoryTheory.Limits.HasZeroObject C]
  [inst_2 : CategoryTheory.Limits.HasZeroMorphisms C] (X : C),
  CategoryTheory.IsPullback 0 (CategoryTheory.CategoryStruct.id X) 0 0 = True