Ehrenfels proceeds to highlight Gestalt qualities in almost every domain. First of all, relations also fall “under the concept of Gestalt quality” (Ehrenfels 1890; Smith 1988, 101), since they consist in a presentational complex of separable elements (as in the case of the similarity relation between red and orange), though the two categories cannot be straightforwardly be equated (Ehrenfels 1890; Smith 1988, 102). Also in the case where elements cannot be combined, i.e., logical incompatibility (as in the case of a round square), there is nevertheless an unintuitive unity to the whole, which is again a Gestalt quality: “If I am to deny the existence of a round square, then I must be in a position to think this round square. i.e., to combine the two determinations roundness and squareness in some way or other.” (Ehrenfels 1890; Smith 1988, 103). Moreover, since one can form unintuitive presentations also when the elements are compatible, Ehrenfels argues that the movement of going from an unintuitive to the corresponding intuitive presentation gives rise to a Gestalt quality.