What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z: Q_3(z) -> Q_1(z). forall z: Q_1(z) <-> W(z). forall z: W(z) -> S(z). forall z: ~S(z). exists z: Q_1(z) -> Q_3(z).
forall z: ~W(z). exists z: Q_1(z) <-> Q_3(z). exists z: Q_3(z) <-> Q_1(z). forall z: Q_1(z) -> W(z). forall z: W(z) -> Q_1(z).