What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_6: W(x_6) or Q_4(x_6). forall x_6: W(x_6) -> ~R_4(x_6). forall x_6: R_4(x_6).
forall x_6: ~W(x_6).