What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_4: W(x_4) -> U(x_4). forall x_4: U_2(x_4). forall x_4: ~U_2(x_4) or T(x_4). forall x_4: T(x_4) -> U(x_4).
Nothing can be inferred from these premises.