What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: forall z: Q(z) -> S(z). forall z: S(z) -> R(z). exists z: U_1(z) -> Q(z). forall z: R(z) -> U_1(z).
forall z: Q(z) -> R(z) can be inferred via the universal transitivity rule. forall z: S(z) -> U_1(z) can be inferred via the universal transitivity rule. exists z: U_1(z) -> S(z) can be inferred via the existential transitivity rule. exists z: R(z) -> Q(z) can be inferred via the existential transitivity rule.