As legend has it, Ernest Hemingway was asked if he knew the shortest story in the English language. He is said to have answered: “For sale: Baby clothes, never used.” Impressive and less than 140 characters. Much as Da Vinci came up with the idea of the parachute before the plane was even invented Hemingway clearly anticipated Twitter. If Hemingway were alive today would he be as prolific or would he spend his days blogging about...