It is completely in line with materialist dialectics to diagnose diseases with intelligent diagnostic cards by mathematical methods, because intelligent diagnostic cards are based on human diagnostic knowledge, and the diagnostic knowledge written in books is the real symptom record recorded by human beings; It is dialectical because it conforms to dialectics. Even if a symptom only corresponds to one disease, it is a conclusion made horizontally without other diseases. All the scores under the name of the disease are symptoms of the disease, that is, all the symptoms in the early, middle and late stages can be understood through the intelligent diagnosis card, while the traditional diagnosis is based on brain memory, so it is difficult to make a correct diagnosis. Materialist dialectics holds that essence and phenomenon are unified, regardless of symptoms-phenomena, no matter how complicated.