At 15:43 +0000 1998/11/09, Sebastian Rahtz wrote: >they have special keyboards which analyse the sweat on their >fingertips, and work out if they are unhappy or happy I doubt this is possible; it's like those people believing that a polygraph can tell if a person is telling a lie or not. You must have been duped. :-) Hans Aberg * Email: Hans Aberg <mailto:[log in to unmask]> * Home Page: <http://www.matematik.su.se/~haberg/> * AMS member listing: <http://www.ams.org/cml/>