[Well that's how they are, right? Regular conversation shifting into philosophical discussions. Seems a bit normal, and kind of a relief, actually, despite the topic. He's fully cooled off.]

No, not exactly. I suppose it has to do with a future version of that Doctor, but... Let's just say Donna had a hand in... [He fights over the right word and makes a bit of an irked face at what he comes up with.] My conception. And it... it didn't go well for her, in the end. She lived, but... she wasn't the same.