I find that there are more and more disciplines now. When two disciplines are combined, such as sociology and psychology, social psychology is combined. There are politics and economy, and discussing the relationship between them is political economy. There are philosophy and science, and the philosophy of studying science is the philosophy of science. There is more and more integration between disciplines, and irrelevant knowledge is wider.
Jared diamond, a medical professor, observed and studied bird migration in new guinea and wrote Guns and Rosebacteria, which is an amazing work and studies the history of human development. Thomas sauville, economist. Wu Jun, a market computer expert who has worked in many scientific and technological enterprises, has not only written professional-related books such as Beauty of Mathematics and General History of Global Science and Technology, but also written completely humanistic books such as Light of Civilization. In his education-related articles, there are countless examples of citing history, and knowledge borrowed from psychology can be found everywhere.
Therefore, knowledge should be measured in degrees.