"[A]t least naively time has completely disappeared from the formalism. This has led to what is called the " in ", which is how to either A) find an interpretation of the theory that restores a role for time or B) provide an interpretation according to which time is not part of a fundamental description of the world, but only reappears in an appropriate classical limit. ...The most well formulated attempt of type B), which is that of Barbour, may very well be logically consistent. But it forces one to swallow quite a radical point of view about the relationship between time and our experience."
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Julian Barbour
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