translation.en: But there is another class of ideas: the rules that govern how we interact with each other; rules like, let's have a tax system that supports a research university that gives away certain kinds of knowledge for free.
translation.zh: 但想法也有另外一层含义 那就是我们怎样彼此交流的规则 像让我们有一个税收系统 来支持一个科研性大学 来免费传授某个知识这样的规则