I really think the author's started to paint herself into a corner with Cherijo; everything that's proposed to her, she rejects out of hand, without any reference to reason, logic, or even facts. It's really getting frustrating and obnoxious, since I'm sure there are facts there (like Duncan's logic behind bringing her on the ship, etc) that she's not even considering. A doctor like this would take one look at a person with a stomach ache, diagnose gastroenteritis, and never take a look at it again because additional facts might disturb her conclusions, which would make her dangerous. The rest of the characters are beginning to resemble caracatures, as well. Frustrating.