 And it I don't know if it is part of the learning curve is that, you know, there are B.F. Skinner. I said I think he had written about one way to teach something. Learning is to have unpredictability with periodicity where you have unpredictable things that don't occur again and again. It's not reproducible in a lab, but it happens again and again. And you will remember those kind of lessons, even if you haven't figured out what the heck they mean.