As for the rest, I’m surprised you think it would take such a lot of engineering to simulate a human brain… we’re already working on simulating small parts of a mouse brain… there’s not that many more orders of magnitude left. Similarly, if you think nanotech will make cryonics practical at some point, then the required technology is on par with what you’d need to make a brain in a jar… or just duplicate the person and use their answer.
Free will and subatomic particles
As for the rest, I’m surprised you think it would take such a lot of engineering to simulate a human brain… we’re already working on simulating small parts of a mouse brain… there’s not that many more orders of magnitude left. Similarly, if you think nanotech will make cryonics practical at some point, then the required technology is on par with what you’d need to make a brain in a jar… or just duplicate the person and use their answer.