想象反事实的能力是区分人类和机器的关键。

我对这场战争了解的不多，但我知道美国的很多年轻人都参与了这场战争。

每一条边界都是虚构的，先在脑海中划定，然后才在大地上留下伤痕。

For every expert there is an equal and opposite expert, but for every fact there is not necessarily an equal and opposite fact.

I think that the role of the mathematician is to discover these patterns and to explain them.