“…In fact, the differences between the 'angel' and the 'rabbit' case are so substantial that no theory should treat them as the same phenomenon. Besides the data about cross-reference, here are some other relevant differences between senses of regular polysemes and ad hoc concepts: (i) the different senses of a polyseme prime each other, while it is doubtful that the use of 'flat' in 'the sea is flat' primes FLAT*, with FLAT* being the concept expressed by 'flat' in 'the Tour de France third stage is flat'; (ii) there seems to be an essential difference between truly ad hoc concepts and senses of a polyseme: the typical ad hoc concepts (ANGEL*, FLAT*) are somewhat vaporous, hard to define or pin down or open-ended (Allott & Textor, 2012), while senses have clear references; (iii) polysemy resolution is usually presented as a process of selection, while ad hoc concept formation prima facie implies constructing one meaning on the fly: contextual information is relevant in both cases, but it seems that in different ways, because in one case contextual information is relevant in order to pick out an already existing sense, while in the other it is relevant in order to construct a meaning; (iv) finally, and above all: the systematicity of regular polysemy requires a specific explanation. Now, note that, although the account is not bound to hold that there is no difference between the two cases, it is difficult to produce an explanation of the difference between 6 The adoption of a thin meaning semantics in Relevance Theory has some implications with respect to ad hoc concepts: according to "standard" Relevance Theory words encode atomic concepts, which give access to encyclopedic entries.…”