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_9: Q(x_9). forall x_9: U(x_9). forall x_9: ~P_2(x_9). exists x_9: P_2(x_9) or P(x_9).
exists x_9: P(x_9) can be inferred via the existential disjunctive syllogism rule. forall x_9: Q(x_9) and U(x_9) can be inferred via the universal conjunction rule. forall x_9: U(x_9) and Q(x_9) can be inferred via the universal conjunction rule.