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<blockquote><a href="http://quotationsbook.com/quote/19821/">Humor is by far the most significant activity of the human brain.</a></blockquote><br> <a href="http://quotationsbook.com/quotes/author/841/">Bono, Edward De</a> on <a href="http://quotationsbook.com/quotes/tag/humor/">humor</a><br> Quote from <a href="http://quotationsbook.com">Quotations Book</a>