http://slacktivist.typepad.com/slacktivist/2008/10/false-witnesses-2.html

This might just be one of the more strikingly effective bits Mr. Clark has done since I started reading him. You owe it to yourself to familiarize yourself with his thesis – it’s powerful and elegant in its explanatory power, which is especially rare when dealing with something as incomprehensible as the vectoring of social lies.