 But since the expression outside us carries with it an unavoidable ambiguity, since it sometimes signifies something that, as a thing in itself [Ding an sich selbst], exists distinct from us and sometimes merely that belongs to outer appearance, then in order to escape uncertainty and use this concept in the latter significance—in which it is taken in the proper psychological question about the reality of our outer intuition—we will distinguish empirically external objects from those that might be called “external” in the transcendental sense, by directly calling them “things that are to be encountered in space”. (A373)