在语言中，词语和它们所指的事物之间没有一对一的对应关系。
In language， there is no one-to-one correspondence between words and the things they refer to.
The most dangerous thought you can have as a creative person is to think you know what you're doing.
We need to design policies that work with human psychology, not against it.
抽象的力量在于它允许我们在更高的层次上推理系统，而不会被细节所困扰。
