EPR paradox and wavefunction collapse across reference frames
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rjbeery
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Yes, that is interesting. My personal perspective, though, assigns nothing special to measurement or even knowledge in the quantum world beyond the principle of least action. As an analogy, the path that water "chooses" to flow down a mountainside is set before it makes its journey. There are not an infinite number of possible paths, but one, which is predestined (i.e. the path of least resistance). The measurement of a quantum system would be analogous to carving a trench at some point in the mountainside - yes, the water's flow does not remain unaffected by this but that does not give the measurement itself any more of an elevated status than the mountain's pre-existing topography had the trench not been dug...
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