∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] [inst_1 : CategoryTheory.Limits.HasInitial C] {P : C}
  (t : CategoryTheory.Limits.IsInitial P), (CategoryTheory.Limits.initialIsoIsInitial t).inv = t.to (⊥_ C)