Fortune Telling Collection - Comprehensive fortune-telling - Why are the results calculated by ten fortune tellers different?

Why are the results calculated by ten fortune tellers different?

Only one of the ten fortune tellers knows, and nine don't.

The elephant gang took an examination of a woman, studied self-introduction for three months, and stayed out of the door for three months. How can it be accurate?

You have to study for more than 20 years and know nothing.