Categorization is one of the most fundamental human cognitive activities. The classical theory exhibits the following basic assumptions: (i Categories are defined in terms of a set of necessary and jointly sufficient conditions > (1) Features are binary >(i) Categories have clear boundaries >(iv) All members of a category have equal statusCategorization is one of the most fundamental human cognitive activities. The classical theory exhibits the following basic assumptions:  (i) Categories are defined in terms of a set of necessary and jointly sufficient conditions.  (ii) Features are binary.  (iii) Categories have clear boundaries.  (iv) All members of a category have equal status