What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists y: ~R(y). forall y: S(y) <-> P_3(y). forall y: R(y) -> P_3(y). forall y: P_3(y) -> R(y).
exists y: ~P_3(y). forall y: R(y) <-> P_3(y). forall y: P_3(y) <-> R(y). forall y: S(y) -> P_3(y). forall y: P_3(y) -> S(y).