What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x: U_2(x) -> T(x). forall x: ~S(x). exists x: T(x) -> S(x). forall x: S(x) -> U_2(x).
exists x: ~T(x). forall x: S(x) -> T(x). exists x: T(x) -> U_2(x). exists x: U_2(x) -> S(x).