I don't know. Humans have lived underground for a very long time. I know it's been over a hundred years, but I can't tell you exactly how long it's been. We didn't learn things like history in my village. We were taught religion instead, though it was...

[...how does he word this...?]

...it was used as a tool to keep the village as peaceful as possible, so it wasn't real.

[And for the first time, Rossiu's expression actually changes! He looks... mildly annoyed. At least it's different from the Very Serious Look he's had the whole conversation?]