This wouldn't involve any Catch-22, chicken-or-the-egg problem regarding whether the stick or the multiverse was created first, since the multiverse elements are four-dimensional spacetimes, whereas "creation" is of course only a meaningful notion within a spacetime. It would appear absurd that the existence of this memory stick would have any impact whatsoever on whether the multiverse it describes exists "for real." Even if the existence of the memory stick mattered, some elements of this multiverse will contain an identical memory stick that would "recursively" support its own physical existence.
If, as I have argued, the computer need only describe and not compute the history, then the complete description would probably fit on a single memory stick, and no CPU power would be required. “The fact that our Universe (together with the entire Level III multiverse) may be simulatable by a quite short computer program calls into question whether i makes any ontological difference whether simulations are "run" or not. Our Mathematical Universe: My Quest for the Ultimate Nature of Reality In summary, Everett showed that if the wavefunction never collapses, then the familiar reality that we perceive is merely the tip of an ontological iceberg, constituting a minuscule part of the true quantum reality.” This makes vastly more parallel universes than there are grains of sand in our Universe. Since such splitting has been going on ever since our Big Bang, pretty much any version of history that you can imagine has actually played out in a quantum parallel universe, as long as it doesn't violate any physical laws.
In other words, parallel-universe splitting is happening constantly, making the number of quantum parallel universes truly dizzying.
As we discussed in the last chapter, such amplification of small differences into big differences happens virtually all the time, like when a cosmic ray-particle hit does/doesn't give someone a cancerous mutation, when today's atmospheric conditions do/don't evolve into a Category 4 hurricane next year, or when you use your neurons to make decisions. “This was when my head really started to spin, because the Quantum Cards experiment is just one particular example of how microscopic quantum weirdness gets amplified into macroscopic quantum weirdness.
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