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Feb10-04, 12:20 AM
Sci Advisor
P: 674
And Bohmian mechanics is not causal. But I agree that it is a very nice viewpoint. I plan to learn more about it at some point.

The interpretational issues are not relevent for the vast majority of all practical applications, but there are some esoteric places it can come up. For example, the "freezing in of quantum fluctuations" during cosmological inflation is not really agreed upon in a rigorous way. Its hard to assign a measurer outside to the universe to collapse its wavefunction! Other cosmological applications as well as quantum gravity need to concern themselves with the measurement problem.