How to Guess Better
How many piano tuners are there in Chicago? Physicist Enrico Fermi used to ask his students this. Most people freeze. They have no idea, so they assume the only way to know is to look it up. But you don’t need the exact answer. You just need to get close. This is what’s known as a Fermi problem. It’s a way to break a big, scary guess into small, easy ones. ...