What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y: R_3(y) -> R_2(y). exists y: ~Q(y). forall y: R_3(y) -> ~W_3(y). forall y: Q(y) or W_3(y). forall y: R_2(y) -> R_3(y).
exists y: W_3(y). forall y: R_3(y) <-> R_2(y). forall y: R_2(y) <-> R_3(y).