You can skip that part and start reading at "Conclusions". The first section merely describes an unrelated experiment, show for contrast, as an example of succe

You can skip that part and start reading at "Conclusions". The first section merely describes an unrelated experiment, show for contrast, as an example of successful research that doesn't commit the sin of overfitting. In fact, the reasons of why this is such a scandal are explained in surprisingly understandable layman prose. Edit: A MIT review linked from the article has a simpler and more detailed explanation of how the test system was abused, and why they did it. http://www.technologyreview.com/view/538111/why-and-how-baidu-cheated-an-artificial-intelligence-test/ http://www.technologyreview.com/view/538111/why-and-how-baid...