By now Theodore knows there's more behind that question than he initially assumed. Questions of place aren't restricted to continents, nor to any time he previously knew to be the present. It's just as likely this man doesn't even come from the same world as him, so Theo approaches the explanation with more hesitation than the question would seem to warrant.

"Er, Earth," he tries at first. "I suppose I've always lived around oceans. Borrel almost seems familiar; it's just too far in the past. I'm from somewhere more modern."

The castle is still mostly unfamiliar to him, but Theo is glad to follow Jon away from the lesson and admit defeat for the time being. Though doing so leaves him wondering something else:

"Exactly how much are we expected to use magic here?"