OK, it’s time for another installment of What is this?, and boy let me tell you that you folks are going to have to work to get this one. I was a real softie last time, and so it was over all too briefly.
What is this?
I believe, or hope, at least, that this one will require some real guessing. I encourage people to post musings or questions. If it turns out to be too hard, I’ll start answering questions so that people can gradully narrow it down.
OK, what is it?