《神经网络与深度学习》讲义-邱锡鹏
一个人在不接触对方的情况下，通过一种特殊的方式，和对方进行 一系列的问答。如果在相当长时间内，他无法根据这些问题判断对方是 人还是计算机，那么就可以认为这个计算机是智能的。(Lectures on neural networks and deep learning - Qiu Xipeng
A person who has no contact with each other has a series of questions and answers with the other person in a special way. If for a long time, he can not judge on these questions whether the person is a person or a computer, then the computer can be thought to be intelligent.)