Add Yahoo as a preferred source to see more of our stories on Google. Close up on a boy dressed as sherlock holmes and looking through a magnifying glass surrounded by other children and adults also ...

Real knowledge is to know the extent of one’s own ignorance. —Confucius What if we are being radically deceived? What if I am no more than a brain kept alive in a vat and fed with stimuli by a mad ...

If you know the enemy and know yourself, you need not fear the result of a hundred battles. —Sun Tzu Source: Viktor Vasnetsov/Wikimedia Commons (Public Domain) The enemies of rational thought can take ...