[ Wise choice, Disciple... And 9S has been doing nothing but bearing with people when it comes to talking about himself, so this is about par the course. ]

Right. It isn't unheard of, though. Sometimes if the war effort required it, you'd get multiple units of the same model running around at the same time. It just isn't ideal. Imagine waking up the next morning and suddenly having a second set of memories you didn't know about buzzing around in your head. It would mess with you a little, right? Better to keep things nice and neat.