Artificial intelligence refers to the intelligence displayed by artificially manufactured systems. The core problems of artificial intelligence include reasoning, knowledge, planning, learning, communication, perception, ability to move and manipulate objects, etc. The various technological breakthroughs described in the following discussion are not related to artificial intelligence:. ['Scientists use the number theorem proving program to prove 38 theorems in Chapter 2 of the book "Principles of Mathematics".', 'Chinese chess program can learn new tactics based on previous chess games when man-machine game, so as to avoid failure due to similar errors.', "The latest TV set bought by Xiao Zhang's home can automatically adjust the screen brightness according to the ambient light around the TV.", 'There is a mobile phone software called siri, which uses natural language processing technology to enable users to interact with the phone using natural dialogue.']