> It's news to me and you, but it certainly isn't news to whoever they wrote about. Simple knowledge can have drastically different effects than public knowled

> It's news to me and you, but it certainly isn't news to whoever they wrote about. Simple knowledge can have drastically different effects than public knowledge, as can be quickly illustrated in a simplified form[1]. [1] http://xkcd.com/blue_eyes.html http://xkcd.com/blue_eyes.html