aaronde comments on So you think you understand Quantum Mechanics - Less Wrong
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Some of these "quantum" concepts that you mention don't require actual quantum physics in the first place. "Quantum dice" is just a short-hand for "truly random decision making method", and a quantum multiverse is for decision-theoretical purposes equivalent to having an infinite ensemble of classical universes with small differences between them, plus self-location uncertainty.
That's my impression anyway.
Agreed. The multiverse idea is older than, and independent of quantum theory. Actually, a single infinitely large classical universe will do, since statistically, every possibility should play out. Nietzsche even had a version of immortality based on an infinitely old universe. Though it's not clear whether he ever meant it literally, he very well could have, because it was consistent with the scientific understanding of the time.
That said, I like the idea of sminux's post. I try to steer clear of quantum language myself, and think others should too, if all they mean by "quantum" is "random".