The whole thing seems to be handwaving that only a non technical person could believe.
Because when you're not a technical person, you won't have good priors for what constitutes proof. You'll be falling back on the same intuition you use when reading a detective story. Who has motive, who has skill, and so on. None of which take you out of the zone of doubt (say between 10 and 90 percent certain) which is why detective stories are fun.
If you're a technical person, you can see how big a deal being able to sign is.
For me, it's pretty easy. If someone says they're Satoshi, we ask him to move some BTC from one of his addresses to another. They'll still be in trust (crappy excuse). If you can do that, you're either him or he essentially gave you his identity by giving you the key.
Because when you're not a technical person, you won't have good priors for what constitutes proof. You'll be falling back on the same intuition you use when reading a detective story. Who has motive, who has skill, and so on. None of which take you out of the zone of doubt (say between 10 and 90 percent certain) which is why detective stories are fun.
If you're a technical person, you can see how big a deal being able to sign is.
For me, it's pretty easy. If someone says they're Satoshi, we ask him to move some BTC from one of his addresses to another. They'll still be in trust (crappy excuse). If you can do that, you're either him or he essentially gave you his identity by giving you the key.