At least,I'm pretty sure it's unusual for thirteen-year-olds to start and lead such conversations.
In other families.
In other news, Elayna has now read Clarke's "The Nine Billion Names of God" and Asimov's "The Last Question".
(Elayna: "Okay, so I get the idea of quantum physics, I get the concept. But I still don't fully understand it."
Adam and I, in unison: "Neither do quantum physicists!")