In his favorite refrain, if you replay this experiment over and over again, starting with a blank slope each time, you would get a vastly different landscape of valleys and peaks each run.

• 用他一再叙说的解释就是，如果你一次次重复这样一个实验，每次都从一个完全相同的空白的斜坡开始，你会发现每次试验都会得到一个山谷和山峰景色完全不同的地形。