When you are talking about "X nines, in retrospect, from a small sample" it's meaningless, and they know it. All it means is, they've had 100% uptime, because t

When you are talking about "X nines, in retrospect, from a small sample" it's meaningless, and they know it. All it means is, they've had 100% uptime, because they've been lucky enough to avoid a crash. And by 100% uptime, I'm sure that's "100% of crashes weren't in our opinion our fault".