What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists y_2: S(y_2) -> ~W_2(y_2). forall y_2: S(y_2) -> Q(y_2). forall y_2: Q(y_2) -> S(y_2). forall y_2: W_2(y_2).
exists y_2: ~S(y_2). forall y_2: S(y_2) <-> Q(y_2). forall y_2: Q(y_2) <-> S(y_2).