What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y_2: W(y_2) -> R_3(y_2). forall y_2: W(y_2) or S(y_2). forall y_2: R_3(y_2) -> W(y_2). forall y_2: S(y_2) -> R_3(y_2). exists y_2: P_4(y_2) -> ~R_3(y_2).
forall y_2: S(y_2) -> W(y_2). forall y_2: R_3(y_2). forall y_2: W(y_2) <-> R_3(y_2). forall y_2: R_3(y_2) <-> W(y_2).