What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x: ~P(x). w <-> W(b_1). forall x: P(x) <-> W(x).
w -> W(b_1). W(b_1) -> w. forall x: P(x) -> W(x). forall x: W(x) -> P(x). forall x: ~W(x).