> The classic example is asking people to describe the process that causes the phases of the moon. Most (myself included the first time) describe an eclipse, wh

> The classic example is asking people to describe the process that causes the phases of the moon. Most (myself included the first time) describe an eclipse, which is wrong. To me, a neat consequence of this is that if you know what part of the cycle the moon is in, you know where it will be relative to the sun in the sky (and vice versa).