's feeling. Misunder- standings can cause pain, misdiagnosis by doctors, mis- judgment by judges, mistakes in markets, battlefields, and government decisions can all make people feel pain.

Why should we pursue objective truth? Because countless experiences tell us that objective truth is in our long-term interest. The ultimate essence of all the objective truths we speak of are practical truths. Objectivity is not the ultimate goal of understanding, it is just a means. Deng Xiaoping said, “It doesn't matter whether a cat is black or white as long as it catches mice.” Feyerabend's famous saying is “Anything goes.” There is no absolute right or wrong even between science and religion.  Feyerabend makes sense, but it is wrong to say “Anything goes.” It is wrong to do against the funda- mental interests of the people, and history cannot be reversed. The ultimate criterion for truth is individua- lism, humanism, and evolutionism. Moreover, the objecti- vity of truth cannot be fully confirmed. All truths must be subjective. Any truth may be overturned in the future. We can only improve the objectivity of the knowledge through practice. That is, the standard of objectivity is the practical standard.

Practicality is the fundamental standard of truth, but this standard is often not easy to use. It is difficult to make timely and accurate assessments of the long-term benefits of people and social progress. To determine which theory is practical, some alternative criteria are needed. Predictability is not only in the interest of people, but also in accordance with the principle of evolution. It is the main difference between science, art, and religion. Therefore, predictability is a substitute standard of truth.

One hundred successful explanations are not as good as a successful prediction. Galileo predicted that objects of different qualities fall at the same speed and it was confirmed by experiments on the Leaning Tower of Pisa. This successful prediction overthrew Aristotle's theory. Einstein opposed the Newtonian system by using the theory of relativity. At the beginning,