One answer is that in a Tegmark multiverse, all possible universes exist, but not to the same degree; that is, each universe or universe-snapshot has a weight, and that weight is higher if it’s causally descended from or simulated inside of other universes with large weight.
One answer is that in a Tegmark multiverse, all possible universes exist, but not to the same degree; that is, each universe or universe-snapshot has a weight, and that weight is higher if it’s causally descended from or simulated inside of other universes with large weight.