What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y_1: W(y_1) -> P(y_1). ~P(c_4). forall y_1: W(y_1) <-> P(y_1).
forall y_1: W(y_1) -> P(y_1). forall y_1: P(y_1) -> W(y_1).