What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_11: P(x_11) <-> S_11(x_11). ~S_11(a_11). ~P(a_11) -> w_4.
forall x_11: P(x_11) -> S_11(x_11). forall x_11: S_11(x_11) -> P(x_11).