The development of learning algorithms that can handle high-dimensional data is a major challenge in the field.

Rule of 7 in research. You can find out anything if you are willing to go seven levels. If the first source you ask doesn’t know， ask them who you should ask next， and so on down the line. If you are willing to go to the 7th source， you’ll almost always get your answer.

故事是作者写给自己的信，用来告诉自己那些无法以其他方式发现的事情。