LaCroix's Law states that as an internet discussion evolves, eventually someone that disagrees with a person will imply that the person watches Fox News and is therefore a moron. This person believes invoking LaCroix's Law "wins" the debate. (see Godwin's Law for a similar adage).
the internet poster Teabagger just invoked LaCroix's Law by posting that internet poster Joe SixPack is a moron and therefore must watch Fox News.
by Duke LaCroix June 18, 2014