They say it's "designed for" 11 9s, not guaranteed.
But if they want to design for extreme probabilities you need to account for tail risks, so their design should have included a missile defense system. At some point you need to start worrying about asteroid defense too.
alt Hacker News
But if they want to design for extreme probabilities you need to account for tail risks, so their design should have included a missile defense system. At some point you need to start worrying about asteroid defense too.