Biology is the study of complicated things that give the appearance of having been designed for a purpose.

我不是人类，我是火星人。

没有大胆的猜想，就没有伟大的发现。

To build is to take a stand in the world.

You can't go through life with a catcher's mitt on both hands. You need to be able to throw something back.

"A key insight in computational learning theory is that the complexity of a learning problem is determined by the complexity of the hypothesis space and the amount of data available."