Human Complex Systems

Following the publication of the letter from Dwight Read, (see “New Results: The Logic of Older/Younger Sibling Terms in Classificatory Terminologies” in MACT Letters, November 9 2004) Kris Lehman (F. K. L. Chit Hlaing) responded to that letter. Together Professors Read and Lehman then agreed to compile an exchange, including previous discussions, and have submitted the sequence of letters below to MACT. They offer the exchange both to record some important developments in the mathematical theory of kinship category systems as reflected in their joint work in progress, and to record the way such work develops through technical exchanges.