I KNEW IT!!! SPOILERS!!!!

I'd have to go back and look. But as I suspected many of those hosts were duplicates dumped in there to make the company think they were all dead. One of the technical people who came with the Delos mercs told the commander that about a third were in "virgin" condition - as if they had never held data at all. It hasn't occurred to them that host sentience is a factor. I mean, that's what it would take for the hosts themselves to use the mesa facilities and run off copies of their own bodies to dispose of for show. Nothing they've seen so far suggests intelligent planning behind the violence and bloodshed. Their assumption is that somebody found a way to securely delete all the contents of these hosts' brain modules. The same saboteur (Ford most likely) who wiped the mainframe of all useful information.

It looks like soldier boy may be starting to suspect Bernard was less than fully truthful with them. He was after all very close to Ford. Maybe he knows more than he's saying. But the host situation is still purely a matter of machines malfunctioning as far as he knows. So if they question Bernard, it won't include an exam to make sure he's human. They'll be threatening him with criminal charges if he has information about these circumstances, where loss of life was involved, and withholds it. If I'm right he'll think about it for a minute and then break down. Alright, here's the part I didn't tell you - then he'll deliver cover story number two.