Of course she would say that. [ They mutter, eyes flicking downward for a moment. ] They're made from donors. The process destroys the donated brain- but sometimes, as in Cortana's case and Delta's source- the donor makes a clone of themselves instead and use that brain.

[ The first of many sins. ]

D's an AI fragment. Smart AI are complicated, massive. Sometimes they compartmentalize themselves on their own to get more done, dummy themselves off to be in more places at once. Delta and Theta? Didn't get a choice. At the end of the day an AI is a digital person.

How do you break a person?