Circular Arguments can lead us to war

The Daily Show with John Stewart provides a very nice example of a circular argument from the run-up to the US invasion of Iraq in 2002. Stewart does a very nice job of explaining the circularity. I have had difficulties with embeds, so here is a link for it: 

Daily Show: A Leak of Their Own

The circularity of course comes from former Vice-President Dick Cheney citing as evidence for his claim that Iraq possessed weapons of mass destruction his own claim that he leaked to the New York Times. We can paraphrase the argument as follows: Iraq has WMD because the New York Times said so, and the New York Times said so because that is what I told them.