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 ...

We all remember our school days when teachers used to bombard us with proverbs which underlined the idea that knowledge is power. Some back-benchers scoffed at them while the nerds embraced the latter ...