Wikipedia

Wikipedia is an online encyclopedia which can be edited by anyone. It can sometimes be a reliable source of information. However, sometimes big name companies and politicians go in and take out all of the negative facts or opinions and replace them with things that make them look good.

So if Wikipedia is used, it should be cross-referenced with another source for accuracy. Also, there is now a system in place that will allow users to view what has been edited and who it was edited by.