There is a basic tool in Bayesian statistics called Bayesian formula, also called Bayesian rule. Although it is a mathematical formula, its principle can be understood without numbers. If you see a person always doing good deeds, that person is probably a good person.
That is to say, when you can't accurately understand the essence of a thing, you can judge the probability of its essential attribute by the number of events related to its specific essence. Expressed in mathematical language, the more events that support an attribute, the greater the possibility that the attribute will be established.