"This is the big hole in the "singularity" scenario -- there's no reason to think that brains are capable of building ever-smarter brains." One thing that coul

"This is the big hole in the "singularity" scenario -- there's no reason to think that brains are capable of building ever-smarter brains." One thing that could be done with simulated brains is save a copy, tinker with it and see what happens. If it doesn't work out, just restart the simulation. This is not so easy to do with biological human brains, but may be quite simple and straightforward with simulated human brains. Of course, there are very serious ethical issues in doing that kind of tinkering and "rebooting" even of simulated brains. But the technological capability to do that will be there should someone decide to (and someone likely will). "We don't even know, really, what that would mean. What would a smarter version of my brain look like?" Does it have to be smarter? How about faster? It may be possible to speed up a brain simulation to the point where it's thinking 10 times faster than humans. Or maybe 100 times faster. Who knows where the limits lie? If you had 10 or 100 lifetimes to think about improving your brain, do you think you might come up with some promising ideas?