How is fortune telling calculated?

Fortune telling is a kind of psychological pressure.

Generally, fortune tellers will first put forward a relatively vague concept, then observe your reaction and continue to ask or answer in depth.

Moreover, the fortune teller will do some logical reasoning through the information you provide.

Therefore, fortune tellers generally don't say very specific things, just ask some superficial questions, which are irrelevant and have no standard answers to observe your state and basic information.

Actually, it's similar to the polygraph used by the judiciary.