What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x: U(x) -> T_3(x). forall x: T_3(x) -> S_3(x). forall x: U(x) or ~S_3(x).
exists x: U(x) -> S_3(x). forall x: S_3(x) -> U(x).