What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x: R_3(x) or W(x). exists x: R_3(x) <-> U_1(x). forall x: T(x) <-> U_1(x). forall x: ~T(x).
forall x: T(x) -> U_1(x). exists x: R_3(x) -> U_1(x). forall x: U_1(x) -> T(x). exists x: U_1(x) -> R_3(x). forall x: ~U_1(x).