What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_3: P(x_3) or ~U(x_3). forall x_3: U(x_3) <-> W(x_3). forall x_3: ~P(x_3).
exists x_3: U(x_3) -> P(x_3). forall x_3: U(x_3) -> W(x_3). forall x_3: W(x_3) -> U(x_3).