Would the Moon
exist if there was no one to see it?
Would a falling tree make a sound if there
was no one to hear it?
Does reality have a separate existence or does it
require presence of an observer?
Einstein believed
that the Moon would still exist and the falling tree would still make a sound
regardless of whether there was anyone around.
Quantum
physicists disagree. According to them, reality has no separate existence and
it is only a manifestation of measurement by an observer.
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