[mwbajor]

You're never going to find a solid answer to these questions. The best you can do is ask yourself "does this seem reasonable".

[Vinnl]

That is absolutely fine to me. (I mean, I'd like answers, but I've gotten used to the idea of limits to our knowledge.) What I appreciated so much is that is broadened the range of potential answers for me, emphasising just how much I'm never going to find solid answers.

[bhk]

Doesn't sound like science at all, does it?

[edgyquant]

Why would it? It’s anthropology