“…Qualitative aspects of complexity, such as the internal complexity of the rules themselves, are not taken into account. (Arends 2001: 180) Students of absolute-quantitative complexity have been interested in, e.g., the number of grammatical categories in a language (Shosted 2006), the number of phonemic contrasts (McWhorter 2001), or the length of the minimal description of a linguistic system (Dahl 2004 as often as not inflection leads to the development of morphophonological processes, which constitute an added component of a grammar to be learned […] Meanwhile, suppletion also complexifies an area of grammar according to our metric. The various suppletive forms of be in English (am, are, is, was, were, been, and similarly in most Indo-European languages) render these languages more complex in this area than languages where the copula is invariable across person and number in the present (McWhorter 2001: 137) Irregularity-based complexity is an absolute notion in that the definition of what should count as ›irregular‹ is theory-driven, but once again the cost associated with such irregularity is incurred by language users.…”