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_15: U_4(x_15) and Q_15(x_15). forall x_12: P_12(x_12).
forall x_15: U_4(x_15) can be inferred via the universal simplification rule. forall x_15: Q_15(x_15) can be inferred via the universal simplification rule.