What kind of person is not sure about fortune telling?

Theoretically, there are no uncertain people.

In real life, there are also people whose calculations are incorrect. What is the reason?

1 Forecasters use the Book of Changes for divination. First of all, forecasters are human beings, and people will make mistakes carelessly, so there is no way to achieve 100%.

Everyone's life span is different. If the life expectancy of the predictor is your noble person, it must be accurate. If you deny that the predictor's life span is correct, the result is either right or wrong.