Ah good, he's aware of the danger of potential future knowledge. That reassures her and she nods her approval at his plan. His prediction about the duplicates is a lot less reassuring though, and she reluctantly considers how she would feel about that. Technically she'd rather not deal with the confusion and distress of encountering someone with the Doctor's mind who isn't the Doctor, but in the end she can't deny a Doctor-likeness her company if he misses her.

"I suppose that would be fine," she grants after a moment. "I do not mind the metacrisis much; at least he is unmistakably human."