So in the book Brothers in Arms in Bujold's Vorkosigan Saga, in one of the conversations real-Miles tried to convince alter-Miles that it's impossible to pretend to be admiral Naismith:
"You still couldn't bring it off," argued Miles. "There are five thousand Dendarii. I know hundreds of them by name, on sight. We've been in combat together. I know things about them their own mothers don't, not in any log. And they've seen me under every kind of stress. You wouldn't even know the right jokes to make.
Was Miles exaggerating to dissuade his captors from using his people? If not, how come he knew that many people well? Dunbar's number places our cognitive limit at 150, not a few hundred...?