孔子也提及，吾百占而七十当，这有一个概率论的灰度。There are many philosophical principles in Yi Xue. Confucius also said, 'I have a hundred and seventy,' and it is correct to say that out of 100, there can be 70. This is a probability theory. There is a historical story that when the State of Lu was about to attack the State of Yue, his disciple Zi Gong had a divination called 'Ding Zhe Zu', saying that they could not fight because fighting against the State of Yue required the army to rise, and if they broke their feet, they would be defeated. Later, Confucius took another divination and also obtained this tripod folding foot, saying that we will definitely win because there are many water resources in the Yue state, so we can go by boat without walking. The subsequent result was Lu Shengyue. What is the problem? The same entry, but different people's reasoning conclusions are different, there is a certain grayscale here.