What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y: ~T_3(y). forall y: P_3(y) <-> T_3(y). exists y: S_2(y) <-> P_3(y).
forall y: P_3(y) -> T_3(y). exists y: S_2(y) -> P_3(y). forall y: T_3(y) -> P_3(y). exists y: P_3(y) -> S_2(y). forall y: ~P_3(y).