 is using a thing called Hilbert spaces, okay? So that's a fancy word that says, I just have a bunch of dimensions, right? Well, a bunch of dimensions by themselves are great. They have certain properties that you need in the solution, but those high dimensional spaces just can't be a bunch of pickup sticks like they're just sitting there. No, they have to create structure. And so one of the approaches that I did for my PhD 20 years ago already was, is that if you use a approach called geometric algebra, and I talk about it in my book and talks online,