 go back in history, the patent office in the US, they originally required that you submit a scale working model of your invention. Now that's not the mathematical kind of minds. Mostly early patents were coming out of the people that were probably non-mathematicians. Think back to things like printing press and that was too early to even be patented but mechanically clever equipment. And we've got a problem right now on people to fix factors. You can't find them. I can tell you where they're at. They're playing video games, autism label when they ought to be fixing factors, all types of factors.