What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_4: P(x_4) <-> S(x_4). forall x_4: P(x_4) or ~R_3(x_4). forall x_4: ~S(x_4).
forall x_4: R_3(x_4) -> P(x_4). forall x_4: P(x_4) -> S(x_4). forall x_4: S(x_4) -> P(x_4). forall x_4: ~P(x_4).