(la) We cannot make sense of there being just one thought. If there is any thought then there must be quite a number of different thoughts attributable to the same thinker. (lb) The presence in a set of thoughts of one with a given content imposes some constraints on the contents of the rest of the set. (2) 'Only whole languages or whole theories or whole belief systems really have meanings, so that the meanings of smaller units ... are merely derivative' (Fodor & Lepore 1992: x). (3) The meaning which an individual thought has depends upon the whole collection ... in which it occurs in such a way that any change in the whole collection ... changes the content of every thought in it.