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Full Idea
After general relativity, quantum mechanics reinstated our familiar notion of time. The buzzing of the quantum world plays out according to the authoritative tick of a clock outside the described system, ...but where is this clock doing its ticking?
Gist of Idea
Quantum theory relies on a clock outside the system - but where is it located?
Source
New Scientist writers (New Scientist articles [2013], 2017.02.04)
Book Ref
-: 'New Scientist magazine' [ 2013], p.31
Related Idea
Idea 19948 Einstein's merging of time with space has left us confused about the nature of time [New Sci.]