What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z: U(z) -> S_1(z). forall z: Q(z) or U(z). forall z: ~Q(z) or R(z). forall z: S_1(z) or ~R(z).
forall z: U(z) or R(z). forall z: R(z) -> S_1(z).