Sabine Hossenfelder, author of Lost in Math: How Beauty Leads Physics Astray, offeres a convenient list and summary of the various multiverse theories currently out there, including
Video games are getting better by the day, and it’s easy to imagine that maybe one day they will be so good we can no longer tell apart the virtual world and the real world. This brings up the question whether maybe we already live in a virtual world, one that is programmed by some being more intelligent than us and technologically ahead? If that is so, there is no reason to think that our universe is the only simulation that is going on. There may be many other universe simulations, programmed by superintelligent beings. This, too, is a variant of the multiverse.
Sabine Hossenfelder, “The multiverse hypothesis: Are there other universes besides our own?” at Back(Re)Action
But why not countless, helplessly infinite, simulations of the simulations as well?
She asks readers to let her know if they think these theories are science or fiction.
Some of us would say both. 😉
See also: Sabine Hossenfelder: The multiverse is a fringe idea
and
Sabine Hossenfelder On The Flight From Falsifiability
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