wikipedia
Go ahead and Google something quickly. We all do it. Wikipedia will quickly crop up as the all-knowing source of answers to anything and everything you may ask. But just how reliable is the information supplied to us by hundreds of thousands of Wikipedians? And how strong is the self-correcting capacity of such a massive source of information? Any student will know that they should never use Wikipedia as an official source, but it's just so easy to find — and even easier to believe.