"Uh...." He didn't really want to say yes, just because it sounded so stupid when the Doctor put it like that. "Well, it's also the mystery factor. Since you don't give your real name out. I guess."

John was starting to feel like a horrible person.

"Of course," he said awkwardly at the mention of T-Rex. "In this place it would be the giant green extinct talking monster that informs you of your fictitiousness." He sighed. "Look, you're right, it is definitely really weird, but you're in good company. We've got no reason to believe that all of us aren't fictional at this rate. And for what it's worth, I don't really think any of us are. I mean, we are somewhere, but not altogether. If that makes sense."

He really shouldn't bother discussing high science with a Time Lord, but at this point, John thought anything might help.