What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_13: P_13(x_13) <-> Q_2(x_13). forall x_13: P_13(x_13) <-> Q_13(x_13). forall x_13: ~Q_13(x_13). forall x_13: Q_2(x_13) -> P_13(x_13).
forall x_13: P_13(x_13) -> Q_2(x_13). forall x_13: P_13(x_13) -> Q_13(x_13). forall x_13: Q_2(x_13) -> P_13(x_13). forall x_13: Q_13(x_13) -> P_13(x_13). forall x_13: ~P_13(x_13).