 One general solution that addresses all of these problems is to hold that a prototype constitutes just part of the structure of a concept. In addition, concepts have conceptual cores, which specify the information relevant to more considered judgments and which underwrite compositional processes. Of course, this just raises the question of what sort of structure conceptual cores have. One suggestion is that conceptual cores have classical structure (Osherson &amp; Smith 1981, Landau 1982). This won’t do, however, since it just raises once again most of the problems associated with the classical theory (Laurence &amp; Margolis 1999).