What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z: Q_4(z) -> T_4(z). forall z: T_4(z) -> ~S_4(z). exists z: T_4(z) -> Q_4(z). forall z: S_4(z).
forall z: ~T_4(z). exists z: T_4(z) <-> Q_4(z). exists z: Q_4(z) <-> T_4(z).