Doonesbury by Garry Trudeau for January 08, 1972
Transcript:
Prof. Green: I'd like to thank you all for bothering to show up for my exam. However, as you know, I don't believe in grades. They are arbitrary artificial distinctions in evaluating a person. Therefore, there will be no exam! B.D.: Yippee! Prof. Green: I take it you were somewhat unprepared.
One of the University of California campuses (or perhaps it was one of the California State University campuses) used to have no grades.