[mirvokrug]

Excellent paragraph IMO. However, what makes spacetime spacetime? I would regard the spacetime variables as meaningless in absolute terms and that we simply define the given variables as spacetime variables. Thus, when we measure energy-momentum, we are constructing the instrument in terms of the given variables, and the energy-momentum we measure is relative to the given variables. In other words, energy-momentum has a definite relationship to spacetime even if energy-momentum and spacetime are meaningless in absolute terms. That is, quantum mechanical operators are relative to the spacetime operators.

That really is nice KJW. It's hard to refute the relativist argument. You not only have tied loose ends up in the context of the ultimate reality but then you have embedded the relativists argument into a multi-verse description of reality (which I assume is eternal) which therefore means that we don't therefore have to contemplate 'where' or 'if' it all began. You must be working towards your long service leave..../tic :-))