This theory was put forward by the ancient Greek philosopher Aristotle. He believes that in the process of understanding the world, people need to be divided into three parts: logical analysis (also called analysis), comparison and proof (also called science) and demonstration (also called demonstration). Therefore, the three theories include these three parts: logical analysis, comparative proof and demonstration. In addition, Aristotle also believes that an opinion must have these three aspects to be recognized, so his theory is called "Three Principles".

Third, this theory appeals to people to realize that we can't draw conclusions only by logical analysis, scientific exploration or experience; It is necessary to combine these three aspects for more systematic and in-depth thinking in order to draw a reliable conclusion. Therefore, the Three Principles provide us with a more effective way to know, understand and think about the world, and how to better analyze and think about problems and their solutions through this way.