"Oh, but I am," the Doctor retorted, tone harsher than he'd intended in response to the bitterness. His expression, and tone, softened quickly and he shook his head. "Not with you, I assure you. With a society that thinks this sort of thing is acceptable. I'd heard of it, certainly, but I hadn't seen it in action." Not knowingly, at any rate, and that thought only worried him more.

"Is it distinguishable? From your real memories?" Whatever pretenses he'd held in the cave of their memories being dreams was gone, with the guard force not around to do anything about it, and he really was concerned about how these new memories affected people.