Language is the most human invention. Spontaneous, unruly, passionate, and erratic it resists every attempt to discipline or regularize it--a history celebrated here in all its irreverent glory. Language is a wild thing. It is vague and anarchic. Style, meaning, and usage are continually on the move. Throughout history, for every mutation, idiosyncrasy, and ubiquitous mistake, there have been countervailing rules, pronouncements and...