Worth a listen IMHO: http://www.radiolab.org/blogs/radiolab-blog/2012/mar/19/turing-problem/ -Lee -- Lee Spector, Professor of Computer Science Cognitive Science, Hampshire College 893 West Street, Amherst, MA 01002-3359 lspector at hampshire.edu, http://hampshire.edu/lspector/ Phone: 413-559-5352, Fax: 413-559-5438