Wikipedia is one of the most useful sites on the Web. It's a fantastic reference source that provides an incredible wealth of data on an endless variety of topics.
A big strength of Wikipedia is that anyone can edit any article. If, for example, an expert on quantum mechanics happens to notice a small factual error in the Wikipedia article on that topic, he or she can easily fix it on the spot. By harnessing the power of the knowledge of millions of people, Wikipedia has grown into the world's biggest reference resource.
However, Wikipedia's strength is also its biggest flaw. The very fact that anyone can edit an article means that errors, spin and bias can easily creep into the Wikipedia database.
If you're looking to read up on millions of disparate topics, from aardvarks to Frank Zappa, Wikipedia can offer you an enormous amount of helpful info that is reasonably free of bias.
But there's one big exception: articles on current political figures and topics.
Here, Wikipedia falls woefully short in its goal of providing a "neutral point of view."
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http://www.beggarscanbechoosers.com/2012/05/how-right-wingers-took-over-wikipedia.html