When I began my economics graduate studies at the University of Illinois in the 1960s, I lived in an apartment in the married graduate student housing. The apartment directly above was occupied by a graduate philosophy student. He particularly did not like my loudly playing music. As a matter of severe revenge for the loud music, he recommended that I take a philosophy seminar from someone named Joseph Agassi. Not realizing that the recommendation was a matter of revenge, I did sign up to the seminar. It was one of the best classes I took in graduate studies.