http://www.guardian.co.uk/science/blog/2012/feb/10/parable-farmers-teleporting-duplicator?CMP=twt_gu Very nice analogy! Charles Professor Charles Oppenheim -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mailman.ecs.soton.ac.uk/pipermail/goal/attachments/20120210/c7afb60c/attachment.html