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) -> Q_1(x_6). exists x_6: W(x_6) or R(x_6). forall x_6: P_6(x_6) -> Q_1(x_6). forall x_6: P_6(x_6) or ~R(x_6).
forall x_6: R(x_6) -> P_6(x_6).