Why can fortune tellers work out the names of strangers?

I know numerology. If a person has never heard or seen a name, he can know someone else's name, which is absolutely deceptive. How to cheat is a skill, which is definitely not my own ability. Seriously, I don't believe it myself, but it must be made up. I don't know the specific method This is a trump card.

Seriously, the fortune tellers standing outside are basically fortune tellers. The real owner is estimated to be in the home of a senior official or boss, and he is too busy.

And these fortuneteller probably still have a little water and know a little, but they haven't studied thoroughly, and they all rely on the experience given by others, so generally speaking, they may be able to say something accurate, which is not his credit, but the skill of our ancestors.