What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x: T_1(x) or ~P_2(x). forall x: ~S_4(x). exists x: S_4(x) <-> T_1(x).
forall x: P_2(x) -> T_1(x). exists x: S_4(x) -> T_1(x). exists x: T_1(x) -> S_4(x). exists x: ~T_1(x).