The Witty Professor: Sidney Morgenbesser Columbia philosophy professor Sidney Morgenbesser died Sunday morning. Born in 1921, Morganbesser was famous for his wit. One well-remembered story about him regards an Oxford philosopher giving a speech at Columbia University 20 years ago. When the don said that in most languages two negatives make a positive, but in no language do two positives make a negative, Morganbesser refuted the point by waving his hand dismissively and saying, "Yeah, Yeah." NPR's Melissa Block talks to Bard College President Leon Botstein.