[Right Wing Professor]

How do you know the cars are moving?

Just set up an interferometer, and measure the speed of light forwards and backwards along three coordinates. The difference, divided by two, will give you the absolute velocity along that coordinate. Add the three vectors, and you have the 'real' velocity.

I'm surprised no one has tried this :-)

[Southack]

Do you agree with the pre-conditions in Post #172?