What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_17: ~P_11(x_17). exists x_17: P_17(x_17) <-> S(x_17). forall x_17: P_11(x_17) or P_17(x_17). forall x_17: S_1(x_17) -> ~S(x_17).
forall x_17: P_17(x_17). exists x_17: P_17(x_17) -> S(x_17). exists x_17: S(x_17) -> P_17(x_17).