On 10/4/2013 7:39 AM, Bruno Marchal wrote:
Physical time, on the contrary is most plausibly a quantum notion, and should normally emerge (assuming comp) from the interference of all computations + the stable first person (plural) points of view.
I don't think physical time is even a single concept. There is "t" that goes in the equations, there is a general relativistic time-like killing vector, there is the direction of increase of local entropy, there is expansion of the universe,... A lot of interesting questions in physics arise from studying how these relate to one another.
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