George Carlin On The Extraordinary Stupidity Of People

By definition, half the population has double digit I.Q.

"Intelligence Quotient"
Wikipedia
http://en.wikipedia.org/wiki/Iq_test

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It also deserves mention tha"stupidity" and "ignorance" are two different things. 
Many intelligent people -- particularly American conservatives -- are worse than stupid. 
Ignorance, after all, is a choice.

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"Know Nothing Nativism"
What's wrong with America...
http://en.wikipedia.org/wiki/Know_nothing