What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: forall x_14: ~Q_14(x_14). forall x_14: P_14(x_14) or U_4(x_14). forall x_14: P_14(x_14) -> Q_14(x_14). u.
forall x_14: ~P_14(x_14) can be inferred via the universal modus tollens rule.