Turns out that Galileo was right and Aristotle was wrong: in a vacuum, a feather and a bowling ball will fall from a tall building at exactly the same speed. This is not to say that Aristotle wasn’t a brilliant thinker; empirical evidence shows he just had a wrong intuition. Even the most powerful intuitions we have can be misleading. Why is it, then, that many philosophers treat them as crucial when arguing for a conclusion? Can intuitions lead us to important truths about the world, or do they merely teach us about ourselves? John and Ken trust their instincts with Alvin Goldman from Rutgers University, author of Knowledge in a Social World.