Wikipedia is not a reliable source for citations elsewhere on Wikipedia, or as a source for copying or translating content. As a user-generated source, it can be edited by anyone at any time, and any information it contains at a particular time could be vandalism, a work in progress, or simply incorrect. Biographies of living persons, subjects that happen to be in the news, and politically or culturally contentious topics are especially vulnerable to these issues. Edits on Wikipedia that are in error may eventually be fixed. However, because Wikipedia is a volunteer-run project, it cannot constantly monitor every contribution. There are many errors that remain unnoticed for hours, days, weeks, months, or even years (see Wikipedia:List of hoaxes on Wikipedia). Additionally, it is possible that some errors may never be fixed. It is also possible for an edit correcting an error to later be reverted. Therefore, Wikipedia should not be considered a definitive source in and of itself. This includes articles, non-article pages, The Signpost, and non-English Wikipedias.