These four events, exactly 19 years apart, actually occured. They tell us a lot. In April 1993, the author/humorist Calvin Trillin arrived at the podium in a 1940-era Minneapolis library to promote his newest book, Remembering Denny. When he began to read, people started to chuckle, and they continued until he closed his book. The humorist made them laugh. Trillin was reading from his remembrance