这就是人类第一个划时代的变革，人类建立了家庭，形成了某种形式的私有制，也给自己带来了无穷无尽的争吵和冲突。

The imagination imitates. It is the critical spirit that creates.

Chance is a word void of sense; nothing can exist without a cause.

In computational complexity, we are not just dealing with the limits of what we can compute, but also with the limits of what we can prove.