Comment by akomtu
1 day ago
If we assume that the many worlds interpretation has a basis in reality, then we can consider the following metaphysical angle. The evolution around us is our world line with the physical laws we are familiar with. And indeed the natural and inevitable progression of this world line is a machine world, just like a massive star inevitably collapses into a black hole, at least under our physical laws. However in the MWI, our world line may split into two: one will continue towards the machine world as if nothing happened, while the other world line will experience a slight change of physical laws that will make the machine world impossible. Both world lines won't know about the split, except by observing a large scale extinction event that corresponds to the other world line departing. IMO, that's the idea behind the famous judgement day.
> And indeed the natural and inevitable progression of this world line is a machine world,
Would you mind clarifying your line of reasoning for suggesting this?
Second: quoting wikipedia - "The many-worlds interpretation implies that there are many parallel, non-interacting worlds."
If the multiple words are non-interacting, how could one world observe a large scale extinction event corresponding to the other world line departing? The two world lines are completely non-interacting, there would be no way to observe anything about the other.
[0] https://en.wikipedia.org/wiki/Many-worlds_interpretation
It's the assumption that in our world, a machine civilization is an almost certain end. This might explain the Fermi paradox that we haven't seen other civilization in the universe: each builds an AI that decides to go radio offline for self-preservation.
As for MWI, I'm assuming that the world lines may split, or fork in Unix terms. What causes such splits is an open question. The splits cannot be detected with certainty, but can be guessed by side effects. Here I'm making another guess that inhabitants of MWI must be in one world line only, so when a split happens, inhabitants choose one of the paths, often unconsciously based on their natural likes and dislikes. But what happens to their body in the abandonded branch of MWI? It continues to exist mechanically for some short period of time, and then something happens to it, so it's destroyed, i.e. its entropy suddenly increases without the binding principle that has left this branch of MWI. In practice, one half of inhabitant would observe a relatively sudden and maybe peaceful extinction of the other half, while that other half simply continued their path in the other world line. And that other half will see a similar picture, but mirrored. Both halves will be left wondering what's just happened.
I think you might be vastly overcomplicating it because I didn't think there had to be any sort of "conservation of branching" in the MWI. each nondeterministic event (of which unfathomable quantities take place every moment) generates an infinite number of branches so to even conceive of the total geometry of all the branching (e.g. all that could ever take place, truly) is a bit of a mindfuck, and that's probably okay and the way it was intended. It's supposed to be comforting to know that regardless of how bad reality seems, if we could navigate arbitrarily through the branching space/time/universes then there would be unimaginable infinities of joyful utopias to visit.
Is it typical to use language like “split into two” for the many worlds interpretation? There should be oodles of universes forking off constantly, right? Rather than thinking of lines, I think of a vast, almost continuous field of imperceptibly different universes.
> Both world lines won't know about the split, except by observing a large scale extinction event that corresponds to the other world line departing. IMO, that's the idea behind the famous judgement day.
This looks more like the Loki television show’s timeline branching mechanism, than the multi-worlds interpretation of wave function collapse.
The only way I’ll know if the many worlds interpretations the right one is if, through a series of coincidences, I manage to evade death for a preposterous amount of time. Then, I will probably conclude that quantum immortality is the thing. So far, I think it is a bit suspicious that, of all the humans I could have been born as, I happened to have been born as one that lives in an incredibly rich country in an era of rapid technological advancement…
Pysical laws don’t change between branches in MW. In fact, it’s close to impossible in a sense, because in MW all branches are part of the same single universal wave function that evolves according to the Schrödinger ewuation.