LEFTY wrote:
Not at all. The Chevy may observe the Ford to have no motion.
The Ford may observe the Chevy to have no motion.
But at end of 1/4 mile, the fuel remaining in the
tanks will indicate the race car with less mass.

Metaphysical musings don't get us any closer to
the notion of time than a couple of kids can
measure with a fuel can on a Sunday afternoon.


Sue...


But neither the Ford nor the Chevy can make an observation in less than
Planck time.

You have 3 things going on here.
1) Observability of time
2) Observability of length
3) Observability of motion, which is a composition of (1) and (2).

Ford observes Chevy, and Chevy observes Ford. But this requires t
PlanckTime, otherwise they cannot make an observation at all.

The reason I specified a Ford and Chevy is because
everyone knows they come with special brackets for
suspending a physics laboratory between a pair. :-)
Nobel 1998 Robert B. Laughlin, Horst L. Störmer, Daniel C. Tsui
http://www.warwick.ac.uk/~phsbm/fqhe.htm
http://physics.nist.gov/cuu/Constants/alpha.html

Sue...



LEFTY can't aspire to crankhood by agreeing with the majority
like that. His idea is likely to get a Nobel Prize. Thanks for the
demo, Sue, but I'm not sure he'll ever be one of us.
Androcles.


Nobel would be in big trouble today for making dynamite. I'm not sure
that I could ever accept money or medals from someone who so obviously
flaunts the law. The world has surely been turned on it's head to deify
a man who does such things.