It’s not the prospect of accidentally becoming someone else that causes her to hesitate, if only for an instant. Rather, it is the desire to keep her own brain in the best possible order, just as she tries to eat right and sleep sufficiently. The Witness, as a matter of course, monitors the behaviour of anyone frequently using memory uploads, and does not allow anything to go wrong. Having a perfect older brother checking in on you from time to time makes things like that considerably less nerve-wracking—and unlike an actual brother, the Witness does not intrude. It is just always there. That being so, the Inspector feels no serious concern in selecting the more intimate option. She takes Diana Hunter into her head, knowing that the Witness will protect her.