I’m pretty worried that we can’t understand the universe “properly” even if we’re in base physics! It’s not yet clearly forbidden that the foundations of philosophy contain unanswerable questions, things where there’s a true answer that affects our universe in ways that are not exposed in any way physically, and can only be referred to by theoretical reasoning; which then relies on how well our philosophy and logic foundations actually have the real universe as a possible referent. Even if they do, things could be annoying. In particular, one possible annoying hypothesis would be if the universe is in Turing machines, but is quantum—then in my opinion that’s very weird but hey at least we have a set in which the universe is realizable. Real analysis and some related stuff gives us some idea things can be reasoned about from within a computation based understanding of structure, but which are philosphically-possibly-extant structures beyond computation, and whether true reality can contain “actual infinities” is a classic debate.
So sims are small potatoes, IMO. Annoying simulators that want to actively mess up our understandings are clearly possible but seem not particularly likely by models I believe right now; seems to me they’d rather just make minds within their own universe; sims are for pretending to be another timeline or universe to a mind you want to instantiate, whatever your reason for that pretense. If we can grab onto possible worlds well enough, and they aren’t messing up our understanding on purpose, then we can reason about plausible base realities and find out we’re primarily in a sim by making universe sims ourselves and discovering the easiest way to find ourselves is if we first simulate some alien civ or other.
But if we can’t even in principle have a hypothesis space which relates meaningfully to what structures a universe could express, then phew, that’s pretty much game over for trying to guess at tegmark 4 and who might simulate us in it or what other base physics was possible or exists physically in some sense.
My giving up on incomprehensible worlds is not a reassuring move, just an unavoidable one. Similar to accepting that if you die in 3 seconds, you can’t do much about it. Hope you don’t, btw.
But yeah currently seems to me that the majority of sim juice comes from civs who want to get to know the neighbors before they meet, so they can prepare the appropriate welcome mat (tone: cynical). Let’s send an actualized preference for strong egalitarianism, yeah? (doesn’t currently look likely that we will, would be a lot of changes from here before that became likely.)
(Also, hopefully everything I said works for either structural realism or mathematical universe. Structural realism without mathematical universe would be an example of the way things could be wacky in ways permanently beyond the reach of logic, while still living in a universe where logic mostly works.)
I should also add:
I’m pretty worried that we can’t understand the universe “properly” even if we’re in base physics! It’s not yet clearly forbidden that the foundations of philosophy contain unanswerable questions, things where there’s a true answer that affects our universe in ways that are not exposed in any way physically, and can only be referred to by theoretical reasoning; which then relies on how well our philosophy and logic foundations actually have the real universe as a possible referent. Even if they do, things could be annoying. In particular, one possible annoying hypothesis would be if the universe is in Turing machines, but is quantum—then in my opinion that’s very weird but hey at least we have a set in which the universe is realizable. Real analysis and some related stuff gives us some idea things can be reasoned about from within a computation based understanding of structure, but which are philosphically-possibly-extant structures beyond computation, and whether true reality can contain “actual infinities” is a classic debate.
So sims are small potatoes, IMO. Annoying simulators that want to actively mess up our understandings are clearly possible but seem not particularly likely by models I believe right now; seems to me they’d rather just make minds within their own universe; sims are for pretending to be another timeline or universe to a mind you want to instantiate, whatever your reason for that pretense. If we can grab onto possible worlds well enough, and they aren’t messing up our understanding on purpose, then we can reason about plausible base realities and find out we’re primarily in a sim by making universe sims ourselves and discovering the easiest way to find ourselves is if we first simulate some alien civ or other.
But if we can’t even in principle have a hypothesis space which relates meaningfully to what structures a universe could express, then phew, that’s pretty much game over for trying to guess at tegmark 4 and who might simulate us in it or what other base physics was possible or exists physically in some sense.
My giving up on incomprehensible worlds is not a reassuring move, just an unavoidable one. Similar to accepting that if you die in 3 seconds, you can’t do much about it. Hope you don’t, btw.
But yeah currently seems to me that the majority of sim juice comes from civs who want to get to know the neighbors before they meet, so they can prepare the appropriate welcome mat (tone: cynical). Let’s send an actualized preference for strong egalitarianism, yeah? (doesn’t currently look likely that we will, would be a lot of changes from here before that became likely.)
(Also, hopefully everything I said works for either structural realism or mathematical universe. Structural realism without mathematical universe would be an example of the way things could be wacky in ways permanently beyond the reach of logic, while still living in a universe where logic mostly works.)