> Aren't these parallel universes running the same computation at the same time, and thus also "farming out" part of their computations to us? If so, it's a zer

> Aren't these parallel universes running the same computation at the same time, and thus also "farming out" part of their computations to us? If so, it's a zero-sum game, so how could there be an overall performance gain for all the universes? The result is the same in all universes. There's a kind of scatter-gather/map-reduce feel - each universe computes part of the problem, then you add up all their results to get the final one (in all universes). The argument works for me, although I already believed the conclusion so I'm biased.