Prediction and geomantic omen are two different things. Predictions are useless and easy to be faked. Feng Shui is realistic, and it is not easy to be faked, because Feng Shui is intuitive and reflects the present, while Daoism is not intuitive and reflects the future. What's the use of reflecting? Therefore, we can see that some ancient fortune-tellers made laughter predictions that broke their glasses, just because the future has not happened yet, and its variability makes it impossible to be killed by foreknowledge. Therefore, smart people should learn Feng Shui, not mysterious techniques such as dodging armor, so as to avoid IQ decline.
Learning feng shui can write 80 books, and we use a truth to run through them: the phase is born by the heart, and the environment turns at will. So what is the most important thing? IQ, stupid enough that even a feng shui master can cheat, or squatting at home to pull two shits of reality.