"Maybe," said Heiji, though he didn't look too happy with this possibility. "We've only seen the broken, decrepit ones. But Calhoun's obviously well-maintained. And it would clear up a lot of problems with Alessa's motive, as well as explaining the way she caught us both. Robots don't need bribes or threats. They do what they're programmed to do, up to and including repeating the same scenario over and over again..."