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I always wonder at the application of the UP to the early universe. I'm sure it has been well-considered, but when decide that there was a state where "the universe was very very young", then we assume at this state that energy was a very unbounded property. Isn't that a very biased approach? Is it more useful to speak in terms of the evolution of these uncertainties? The UP really defines the resolution of a coupling, and if we extrapolate back, there comes a point where they are essentially uncoupled.