It would seem that the theory [quantum mechanics] is exclusively concerned
about "results of measurement", and has nothing to say about anything
else. What exactly qualifies some physical systems to play the role
of "measurer"? Was the wavefunction of the world waiting to jump for
thousands of millions of years until a single-celled living creature
appeared? Or did it have to wait a little longer, for some better
qualified system ... with a Ph.D.? -- J. S. Bell
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