What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_17: Q_3(x_17) -> P_4(x_17). forall x_17: P_4(x_17) -> Q_3(x_17). forall x_17: S_1(x_17) <-> Q_3(x_17). forall x_17: S_1(x_17) -> ~W(x_17). exists x_17: W(x_17).
exists x_17: ~S_1(x_17). forall x_17: Q_3(x_17) <-> P_4(x_17). forall x_17: P_4(x_17) <-> Q_3(x_17). forall x_17: S_1(x_17) -> Q_3(x_17). forall x_17: Q_3(x_17) -> S_1(x_17).