What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y: S_1(y) or ~W_4(y). forall y: Q(y) -> R(y). forall y: S_1(y) -> W_4(y). exists y: R(y) -> S_1(y).
exists y: R(y) -> W_4(y). exists y: Q(y) -> S_1(y). forall y: W_4(y) -> S_1(y).