Informational Principles in the Perception-Action LoopAshby's Law of Requisite Variety (1956) and, in last years, especiallyits later rediscovery and extension by Touchette and Lloyd (2000,2004) have indicated that Shannon information acts as fundamental"currency" constraining the potential organisation and"administration" of cognitive tasks. [Released under Creative Commons Attribution-NonCommercial-ShareAlike 2.0 UK: England & Wales licence.]