Christopher, The Loebner Prize, is awarded for the ability for artificial intelligence software to appear to be human. There are several levels of the prize. (Pardon me
Posy for saying it). Here is a links for more details.
http://www.loebner.net/Prizef/loebner-prize.html
Sakuma, yes, we are all fond of
Posy and
Angela.
Pangor