What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_12: W(x_12) <-> P_4(x_12). forall x_12: P_6(x_12) or ~Q_6(x_12). forall x_12: W(x_12) -> Q_6(x_12).
forall x_12: Q_6(x_12) -> P_6(x_12). forall x_12: W(x_12) -> P_4(x_12). forall x_12: P_4(x_12) -> W(x_12).