Do you agree with the pre-conditions in Post #172?Do you agree with the pre-conditions in Post #172? What I was trying to point out, rather snidely, and mostly for the amusement of Physicist, is that your 'reality' is an idea that was tested and discarded at the end of the 19th Century. The Michelson Morley experiment (which I rather crudely described) was an attempt to measure the absolute movement of the earth through space, and it failed. There is no single reference frame that is 'real', as opposed to any others. You can write a self consistent set of equations for any inertial frame you want, and they'll be just as good as those in any other inertial frame.