随机实验是因果推理的黄金标准,但它们并不总是可行的。
"We live in the time we have and we see with the eyes we have."
Great companies are built on great products and even greater people.
类比城市是一个类似于另一个城市的城市。
大部分的人宁可否认事实,也不愿面对真相。