This would be Earth. It's actually quite similar to the Disc in some aspects, but... well, different in several others. The best way I can describe it is that the Disc is a lot like Earth was a couple hundred years ago." She pauses. "Also this planet is round."
Carcer had guessed right; the question seems perfectly reasonable to JT.
"Oh no, this isn't an afterlife. I don't know what happened to you, but you're certainly alive now. Unless you're a zombie, which would be kind of neat. Both of my parents were dead, too, you know." Oddly enough, she seems perfectly cheerful about this fact.