Alex Martelli wrote: > to be called "identical" by ALL observers (because trying to > ascertain the differences, if any, would inevitably perturb the > systems irretrievably by Heisenberg's effect
Not to detract from your point, but the "Heisenberg effect", if you mean the "Heisenberg uncertainty principle" is much more fundamental (and quantumly "spooky") than this. You are merely talking about the observer disturbing the system by the process of observation, which is a common problem, but has nothing to do with Heisenberg, and AFAIK, doesn't really have a name. It's a normal application of classical physics. I'm sorry to nitpick, it's just that it's one of those misconceptions that never wants to die, like thinking that gravity is caused by magnetism or the Earth's rotation, or that you can "get too close and be 'sucked in' by a strong gravity field", or that things are "weightless" in orbit, because they're "too far from the Earth's gravity". Cheers, Terry -- Terry Hancock ([EMAIL PROTECTED]) Anansi Spaceworks http://www.AnansiSpaceworks.com -- http://mail.python.org/mailman/listinfo/python-list
