If you time travel, “Universe A” doesn’t exist.
If you don’t, then “Universe B” doesn’t exist.
They’re BOTH universes which fail to exist if you chose the other one.
No one dies—there’s just a universe that doesn’t exist because you didn’t choose it.
If you time-travel, Universe A still existed once, and contrary to the preferences of the people there was then extinguished. The preferences of the people in not-yet-existent meta-future Universe B don’t matter to me yet, because they may never exist.
Once Universe B is created, and if there was some way to restore Universe A, it’d be then that the preferences of the residents of the two universes (past and present) would weigh equally to my mind, having been equally real.
Universe A still used-to-exist , it just doesn’t-exist-in-the-future.
Universe B did NOT used-to-exist, and it will continue to not-exist-in-the-future unless you chose it.
In other words, both universes don’t-exist-in-the-future if you don’t chose them.
I suppose I’m lost on why one would consider “Universe A ceases to exist going forward” with “Universe A is destroyed”. It feels like a really weird variant of the sunk cost fallacy, since Universe B failing to exist going forward isn’t a big deal.
I can see arguments about time travel being complex, it’s hard to predict the results, etc., but all else being equal it seems baffling to insist on A over B just because A happened to exist in the past.
If you time travel, “Universe A” doesn’t exist. If you don’t, then “Universe B” doesn’t exist.
They’re BOTH universes which fail to exist if you chose the other one. No one dies—there’s just a universe that doesn’t exist because you didn’t choose it.
If you time-travel, Universe A still existed once, and contrary to the preferences of the people there was then extinguished. The preferences of the people in not-yet-existent meta-future Universe B don’t matter to me yet, because they may never exist.
Once Universe B is created, and if there was some way to restore Universe A, it’d be then that the preferences of the residents of the two universes (past and present) would weigh equally to my mind, having been equally real.
Universe A still used-to-exist , it just doesn’t-exist-in-the-future. Universe B did NOT used-to-exist, and it will continue to not-exist-in-the-future unless you chose it.
In other words, both universes don’t-exist-in-the-future if you don’t chose them.
I suppose I’m lost on why one would consider “Universe A ceases to exist going forward” with “Universe A is destroyed”. It feels like a really weird variant of the sunk cost fallacy, since Universe B failing to exist going forward isn’t a big deal.
I can see arguments about time travel being complex, it’s hard to predict the results, etc., but all else being equal it seems baffling to insist on A over B just because A happened to exist in the past.