http://en.wikipedia.org/wiki/Ship_of_Theseus [Ian] > Or even better "Trigger's Broom" http://www.youtube.com/watch?v=bk24RdfXWcg I'll bet 2 bob that "Trigger's Broom" was written by a former philosophy major from Oxbridge. Did you notice that "Trigger's Broom" was mentioned in Wikipedia? Craig