What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x: U_3(x) or ~W_2(x). forall x: W_2(x) or ~U_3(x). exists x: ~W_2(x).
forall x: W_2(x) -> U_3(x). forall x: U_3(x) -> W_2(x).