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: W(z) or S_4(z). forall z: Q(z) -> T(z). forall z: W(z) <-> T(z). forall z: S_4(z) -> Q(z).
forall z: S_4(z) -> T(z) can be inferred via the universal transitivity rule. forall z: W(z) -> T(z) can be inferred via the universal biconditional elimination rule. forall z: T(z) -> W(z) can be inferred via the universal biconditional elimination rule.