But since in simple reﬂection on perception it is not a question of reﬂecting on a determinate concept, but in general only of reﬂecting on the rule concerning perception as an aid to the understanding, as a faculty of concepts, it is evident in the case of a merely reﬂective judgement that the imagination and the understanding are regarded in their necessary relationship to one another with respect to power of judgement in general, in contrast to their actual relationship in a given perception.