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- Artificial Intelligence: We obviously already have some reasonably good artificial intelligence, but for it to be a singularity it would have to be generalized, self-improving, smarter than we are, and conscious. I think the last of those is the hardest, even if it turns out that the materialists are totally right (and a lot of very smart, non-religious people think that they aren’t) we’re not even close to solving the problem.
- Brain uploading: I talked about this in the post I did about Robin Hansen and the MTA conference, but in essence, all of the objections about consciousness are still essentially present here, and as I mentioned there, if we can’t even accurately model a species with 302 neurons. How do we ever model or replicate a species with over 100 billion?
- Fusion Power: This would be a big deal, big enough to count as a singularity, but not the game changer that some of the other things would be. Also as I pointed out in a previous post, at a certain point power isn’t the problem if we’re going to keep growing, heat is.
- Extraterrestrial colonies: Perhaps the most realistic of the singularities at least in the short term, but like fusion not as much of a game changer as people would hope. Refer to my previous post for a full breakdown of why this is harder than people think, but in short, unless we can find some place that’s livable and makes a net profit, long-term extraterrestrial colonies are unsustainable.