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_10: P_3(x_10) -> Q_9(x_10). forall x_10: U_4(x_10) -> ~P_3(x_10). forall x_10: Q_10(x_10) -> P_3(x_10). forall x_10: Q_9(x_10) or P_10(x_10). forall x_10: P_10(x_10) -> Q_10(x_10). forall x_10: Q_9(x_10) -> P_3(x_10).
forall x_10: Q_10(x_10) -> Q_9(x_10) can be inferred via the universal transitivity rule. forall x_10: P_10(x_10) -> P_3(x_10) can be inferred via the universal transitivity rule. forall x_10: P_3(x_10) <-> Q_9(x_10) can be inferred via the universal biconditional introduction rule. forall x_10: Q_9(x_10) <-> P_3(x_10) can be inferred via the universal biconditional introduction rule.