I suspect the guy in the back was being a smartass. After all, if A hires A, and B hires C, how do you end up with B's in the company in the first place? It's

I suspect the guy in the back was being a smartass. After all, if A hires A, and B hires C, how do you end up with B's in the company in the first place? It's the sort of unreachable condition that your typical computer geek just can't resist pointing out. Eh, maybe A's or C's become B's while they're at the company.