计算学习理论中的一个关键见解是，学习问题的复杂性由假设空间的复杂性和可用数据的数量决定。

The state, therefore, has not existed from all eternity. There have been societies that did without it, that had no notion of the state or state power. At a certain stage of economic development, which was necessarily bound up with the split of society into classes, the state became a necessity.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

我不考虑年龄。我考虑的是精神。我考虑的是内心的感受。