Numbers, dots, lines, planes and bodies are not objects of the objective world, but symbols and logical constructs created by human being. People continued to construct and deduce these logical constructs, making them complicate and orderly in order to form subjects like maths and geometry. The content of these subjects is the systematic content of subjective logical constructs.
When human first created symbols, the purpose was to simulate the real things. Later, the symbols gradually developed, and the symbols themselves constituted a complex and orderly system. The process in which these symbols are processed and transformed by people's thought games often has nothing to do with the external things that were initially imitated. Maths and geometry are such systems of symbols. Points, lines, planes, and bodies can find their external counterparts at the beginning, but many of the geometry propositions they constitute have nothing to do with external things. Natural numbers can be said to be description of the number of external things, but the relationship between external things and decimal, fraction, irrational number, set, calculus and other mathematical content is becoming less and less.
Because maths and geometry played complex thought games in ancient times, and the products of these games were of great practical significance and were the basis of all human culture and civilization, these abstract concepts were much more important than concrete things. It makes sense for Plato to push the idea to a supreme position, and it makes sense that Plato and Objective Idealism enjoyed a high place in the history of philosophy. Today, we should correctly evaluate the value and defects of Idealism, at this basis, establish a new philosophical theory in which concepts replace ideas and Dialectical Dualism replace Objective Idealism.[12]
All simulation is fake, all the concepts, all the logical constructs, all the innovations of the logical constructs coming from simulation, are fake. These fake things are simple, useful and stable. They are the main content of human civilization and culture. The ultimate goal of philosophy and science is not to pursue objectivity, but to pursue practical value and serve practice.