Enlightenment of the Combinatorial Notion

As is known to all, the science's function lies in guiding human activities and promotes the human civilization. However, science is the knowledge of humans ourselves on things in the universe. While it benefits humans, the accumulation of humans intrusion on the nature is increased year by year, causes the reaction of nature on humans such as the global warming, ice caps melt, sea level rise, extreme weather, drought, earthquakes, tsunamis and other natural disasters in the eyes of humans and affects human activities to some extent also. This fact awakes up humans to look at science with its leading to human activities and reflects the nature of science again. Among them, a most important question is whether science is absolutely true or only local and conditional true? Different answers to this question determine the attitude towards science with its application, namely living in harmony with or govern the nature. In fact, one's recognition on things is carried out by the "six sense organs", namely, the eyes, ears, nose, tongue, body and mind of human, which have certain limitations by their working mechanism. Accordingly, science is only a local recognition or conditional true of things. In this case, how to form a combined recognition based on their inherited topological structure of things and then to hold on the reality of things by local recognition is an important work in the development of science. In fact, this is nothing else but the combinatorial notion on recognition of things in the universe, explained detail in my book Combinatorial Theory on the Universe (in Chinese).