An anonymous reader writes The Washington Post's Caitlin Dewey has written a lengthy feature covering one of Wikipedia's most intractable problems: carefully inserted hoax information that is almost impossible to detect. Dewey's investigation starts with the recent discovery of the nonexistent Australian god "Jar'Edo Wens" (which lasted almost ten years), and discusses a Wikipediocracy post about a recent experiment by critic Greg Kohs, in which 30 articles received cleverly-chosen minor falsehoods. More than half survived for more than two months. Included is also a chart showing that editing participation in Wikipedia has "atrophied" since 2007. It is quite rare to see a feature in a major media outlet as critical as this, of Wikipedia and its little-known internal problems. Especially on the heels of a very favorable CBS 60 Minutes report. As Kohs says, "I think this has proved, beyond a reasonable doubt, that it's not fair to say Wikipedia is 'self-correcting.'"