Fans of the brilliant 1960s television show The Prisoner remember the primal expression of freedom in the voiceover at the beginning of each episode: “I am not a number! I am a free man!” Fortunately, things have changed since the sixties. In this enlightened age, we recognize the fundamental truth that a human being is not really a number at all — in fact, humans are a mosaic of numbers. Numbers that quantify social interaction, numbers that model shopping behavior, numbers that predict which movies you will favor, who you are most likely to marry, the odds that you will buy a new car within the year, whether you buy whole milk, low fat, or skim. An endless parade of numbers in endless permutations, endlessly analyzed.