With little notice from the outside world, the community-written encyclopedia Wikipedia has redefined the commonly accepted use of the word "truth."

Why should we care? Because ­Wikipedia's articles are the first- or second-ranked results for most Internet searches. Type "iron" into Google, and Wikipedia's article on the element is the top-ranked result; likewise, its article on the Iron Cross is first when the search words are "iron cross." Google's search algorithms rank a story in part by how many times it has been linked to; people are linking to Wikipedia articles a lot.

This means that the content of these articles really matters. Wikipedia's standards of inclusion--what's in and what's not--affect the work of journalists, who routinely read Wikipedia articles and then repeat the wikiclaims as "background" without bothering to cite them. These standards affect students, whose research on many topics starts (and often ends) with Wikipedia. And since I used Wikipedia to research large parts of this article, these standards are affecting you, dear reader, at this very moment.