I'm a big believer that me fact that everybody who hears about this actually feels moved to argue about it. They feel, on some level, personally attacked if somebody doesn't agree with them about the answer. And i love, i cannot even tell you how many of these vidios i watched on the in and out while i was ike preping this chapter as a math teacher. You love that, because we look at it nd say, the son that people are getting so exercised about this issue is that they are recognizing that there is an actual mathematical issue here.