What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_18: W(x_18) -> ~R_16(x_18). forall x_18: P_16(x_18) or Q_16(x_18). forall x_18: Q(x_18) -> W(x_18). exists x_18: Q_16(x_18) -> R_16(x_18). forall x_18: P_16(x_18) -> R_16(x_18). forall x_18: W(x_18) -> Q(x_18).
exists x_18: R_16(x_18). forall x_18: Q(x_18) <-> W(x_18). forall x_18: W(x_18) <-> Q(x_18).