I was busy one day during my prep, my phone goes off it's my daughter she asks what am I doing? I said work. Are you in class I ask she says I'm opting out OPTING OUT!!! I say. She goes yeah some Descartes guy. So she sends me a copy of the lesson. I look it over and say this easy. And she exclaims Dad you're 58 Masters degrees you should know this!!!! And know she was right!