What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x: T(x). forall x: T(x) <-> S_2(x). forall x: U(x).
forall x: T(x) and U(x). forall x: U(x) and T(x). forall x: T(x) -> S_2(x). forall x: S_2(x) -> T(x).