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vampiretooth

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If reality is fundamentally physicalist/materialist, there does not seem to be any fundamental theoretical barrier that prevents us from eventually recreating or simulating every possible personality type combined with every imaginable conscious experience.

This strikes me as a transhumanist version of the Christian 'everyone is reborn on Judgment Day'

I don't know that there is anything much interesting to explore down this path other than, "yes, it does indeed seem possible, but not soon" - but I'm curious if any of the above resonates? At least initially, I'm not especially interested in the resource-allocation constraints.

One idea that slightly interests me is that the typical concept of the Christian Resurrection seems a logical impossibility - assuming personal identity of the "soul" remains intact, it's creating information out of nothing, which breaks thermodynamics laws.

But the materialist/transhumanist version seems only a technical impossibility.

This post from 13 years ago seems to have a tangential take (https://www.lesswrong.com/posts/C5ryrg5ktngwsZHnX/resurrection-through-simulation-questions-of-feasibility)

2[anonymous]1y

How hard would this be? I tried to come up with a lower bound for how many distinct human brains there are. This was an act of great hubris. Confidence is 0.6 that I've given a true lower bound. 8.6*10^10 neurons in the brain. Each neuron is connected to between 1 and tens-of-thousands of neurons. So I represent the brain is represented as a 100-regular undirected graph on 300 neurons (lower bound!) . If there are N 100-regular graphs on n, then how many such on n+1? I (n-choose-100)*N (I think?). This gives ~10^109829 possibilities. Google tells me there are roughly 10^80 atoms. if the period of simulation lasts 1 second, and we can simulate 10^80 brains simultaneously, it would take ~10^109742 years to simulate them all. Google says heat death is roughly 10^1000 years away, so we would have completed almost 1/100 of them by then. The 100-regular graph is a poor model for this purpose because it includes all such graphs, and some neurons just shouldn't be connected in any sensible brain. But given that I've under-sized the brain model by 8 orders of magnitude, and given us the ability to simulate a brain using an atom, and assumed the simulation hardware functions even into heat death, I think this is a convincing lower bound. An event like this occurs in Charles Stross's Accelerando. Great book!

it would take ~10^109742 years to simulate them all. Google says heat death is roughly 10^1000 years away, so we would have completed almost 1/100 of them by then

10^1000 x 100 = 10^1002