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_12: Q_1(x_12) or S(x_12). exists x_12: ~Q_1(x_12). forall x_12: Q(x_12) and U(x_12).
exists x_12: S(x_12) can be inferred via the existential disjunctive syllogism rule. forall x_12: Q(x_12) can be inferred via the universal simplification rule. forall x_12: U(x_12) can be inferred via the universal simplification rule.