What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x: T_2(x) -> U(x). forall x: ~T_1(x). forall x: T_1(x) -> T_2(x). exists x: U(x) -> T_1(x).
exists x: ~U(x). forall x: T_1(x) -> U(x). exists x: U(x) -> T_2(x). exists x: T_2(x) -> T_1(x).