> It’s definitely meaningful in that we can talk about it! No, it's much more meaningful. Different languages or computation models allow different levels of i

> It’s definitely meaningful in that we can talk about it! No, it's much more meaningful. Different languages or computation models allow different levels of introspection. In some models quines are trivial: just ask for your source code and print it out. In some models it's non trivial that quines exist at all (but it turns out they exist).