Andy Kessler said he went through a semesters worth of classes by watching lectures on YouTube. In the article Kessler claims that lectures are free, as we learned in class lectures or the information given in a lecture is a public good. Colleges take the public good and deliver it to you through lectures. Kessler could go through four years of YouTubeU and get nothing. As we know for all our time sitting through lectures at the end we gain a little piece of paper that says to potential employees, hey hire me.