My father recently went to California for the first time in nearly forty years. "What were your impressions?" I asked. "Well, California has changed a lot. In 1968 I read a book at the library of UC Berkeley. This time, I ordered that same book, and — they didn't have it!" I later repeated this exchange in my father's presence, and he objected: "That's not what I said." But it is. (This is very typical of my father.)