It will first of all be clear that not only incompatible but also compatible characters can be thought in emptily intended combinations. This indeed takes place very often, as a result of that parsimony which nature always brings to bear in the achievement of her aims. Unintuitive presentation demands much less expenditure of effort than the intuitive, and thereby goes proxy for the latter in very many cases. Thus anyone confronted with, say, a complicated description of a work of architecture will first of all form a merely indirect presentation of it, which will then be rounded out by gradual execution or fulfilment of the various merely intended components, to yield an intuitive total picture.
We must also accept the possibility of Gestalt qualities comprehending complexes of elements of different categories.
For the intimate fusion of touch, temperature and sometimes also taste and smell sensations into a single unified total impression raises the question of whether we do not have here Gestalt qualities which are built up upon a foundation belonging to several sensory regions. As can easily be recognized, it is just as possible that a complex of, say, touch and temperature sensations should provide the foundation for a Gestalt quality as should a complex of sound sensations. Indeed no a priori objection can be raised even against the idea that there should exist sound-colour-Gestalten spanning the data of the senses of sound and vision as something like a bridge — even though we do not believe that we can detect anything of this sort in sensation.