What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_2: Q(x_2) -> U(x_2). forall x_2: R(x_2) or W(x_2). forall x_2: W(x_2) <-> U(x_2). exists x_2: ~R(x_2) or Q(x_2).
exists x_2: W(x_2) or Q(x_2). forall x_2: W(x_2) -> U(x_2). forall x_2: U(x_2) -> W(x_2).