The coinage mathiness follows the pattern of truthiness coined by comedian Stephen Colbert. She challenged Colbert on his claim that he had invented the word "truthiness". They also mentioned Colbert's role in making the word "truthiness". His latest book "Truth or Truthiness" explains how to use evidence to debunk baseless claims. Colbert later ascribed truthiness to other institutions and organizations, including Wikipedia. After Colbert's introduction of truthiness, it quickly became widely used and recognized. Keen opines that in this unfortunate situation actual facts would instead be supplanted by "truthiness". On January 31, 2006, Arianna Huffington used "truthiness" in The Huffington Post. Usage of "truthiness" continued to proliferate in media, politics, and public consciousness. As a result, the word "Truthiness" appeared in the poster. In addition, "truthiness" became the American Dialect Society's Word of the Year for 2005. Among the nominations selected in the "Words" category was "Truthiness". You don't look up truthiness in a book, you look it up in your gut.