ABSTRACT
This chapter looks at some problems in the theory of perception that absorbed L. Wittgenstein’s attention during one period of his life. Sometimes the space in a laboratory turns out to be a little cramped to deal with all the theoretical questions which research raises or revives. It is not easy, in particular, to find colleagues ready to discuss imaginatively and without prospect of return problems not belonging to any particular territory, at the borders between science, philosophy and other rather indistinct interests. Reducing the visibility of the double aspect suggested by our author risks, right from the start, preventing the reader from seeing the terms of the problem, which is not a problem of words but concerns the internal structure of the object under observation.
