I'm committed to the fact that I should shave my hair on camera and distribute the video to all students so we can all watch it. Lauren has convinced me of that, but notice, this argument applies to me. It also applies to Ram. So if I've gotta shave my head, Ram's got to shave his beard. So, although I have to shave my head, at least I'm not alone. Guess we gotta both go do it. >> Okay so I'm convinced that I should shave my head but I'm just not going to do it. I don't know if I can live without my beautiful locks. >> Yeah I know exactly what you're talking about. I mean I'm equally convinced that I should shave my beard but it just doesn't feel right somehow. >> I know, there's no way they're going to force us, no. >> I don't think it's going to happen. >> No. >> It's just not going to happen. >> Yo, I'm going to make you do it. Dude, you need to recognize the power of reasoning and argument. >> No! He caught me! >> Thanks to all of our students. We hope you learned a lot and had a lot of fun. We sure learned a lot from you. I remember learning about goats from a goat farmer in Afghanistan, and AIDS from an AIDS activist in Africa, and traffic flow from an Australian engineer, and wild dogs from a student from Eastern Europe. We've also been inspired by a lot of students. One student had her house destroyed by a cyclone and apologized for missing a deadline. An Iranian group of linguistics students met together every week and so did a group in a cafe in San Francisco. We had visually challenged students from Eastern Europe and one student with a chronic disease that had never been able to take a college course before. So, now sadly we have to say goodbye but we hope that the lessons will stay with you. Our goal has been to teach you to first of all ask whether you have good enough reasons for the positions that you hold. And then to enable you to formulate those reasons better when you do have good reasons for your own beliefs. But also to pay attention to other people, and appreciate and be fair to opponents who hold different positions. So please use these skills throughout the rest of your life. They will help you cooperate with other people and succeed in your own goals whatever you want to accomplish. >> So now there are only two things left to do. One, we'll send all that hair to Locks of Love. And two, now that it's all gone we might as well paint my entire head Duke Blue. [SOUND] [MUSIC] I don't know. I got my doubts now, but it did seem like a good idea at the time. Luckily I'm not going to be alone. Ram, your turn. >> So listen, I'm going to make sure nobody, nobody knows about this okay? I do not want to be associated with that big Duke Blue clown okay? So, nobody can know about this. All right? You don't tell anybody? All right, all right. Good man. >> We are so grateful to all of you for taking the time out of your busy lives to take our course and help us make it even better for future generations of students. Thank you to the graphic designer from Mexico who secretly wants to go study philosophy. Thank you to the retired social worker from Darwin, Australia who was studying to become a workplace meditation consultant. Thank you to the recent college graduate from the Philippines who stuck with our course even when a massive typhoon tragically devastated her country. Thank you to the polite gentleman from Huntsville, Alabama who had to stand up to the criticism of his peers in order to take our course. Thank you to the young man from Rio de Janeiro who did the problem sets in the middle of Carnival. Thank you to the barber from Cairo who would complete the quizzes whenever he had a break between clients. Thank you to the taxi driver from Bangalore who would contribute to the discussion forums using voice recognition software while driving. Thank you to the hypnotist who found time to complete our course while also getting all of his clients to do so as well. And thank you to the anesthesiologist who would read our lecture transcripts out loud while at work. It is because of all of you that our work was worthwhile. >> Bye. >> Bye, guys. Thanks for doing such a great job. Bye.