Godwin's law: As an online discussion grows longer, the probability of a comparison involving Nazis or Hitler approaches one.
Godwin's Law is named after Mike Godwin, who was legal counsel for the Electronic Frontier Foundation in the early 1990s, when the law was first popularized. Richard Sexton maintains that the law is a formalization of his October 16, 1989 post
You can tell when a USENET discussion is getting old when one of the participents [sic] drags out Hitler and the Nazis.
(via Dan Gillmor)
