Thread:Cdragon13/@comment-24808864-20140519035117/@comment-24786053-20140519042104

But this one didn't contain anything about voted. http://khanacademy.wikia.com/wiki/Thread:13507#7

Proof: http://img3.wikia.nocookie.net/__cb20140519042038/khanacademy/images/e/ed/Proof19.jpg