Set Universe Polymorphism. Module Type FOO. Parameter f : Type -> Type. Parameter h : forall T, f T. End FOO. Module Type BAR. Include FOO. End BAR. Module Type BAZ. Include FOO. End BAZ. Module BAR_FROM_BAZ (baz : BAZ) <: BAR. Definition f : Type -> Type. Proof. exact baz.f. Defined. Definition h : forall T, f T. Admitted. Fail End BAR_FROM_BAZ.