Generally speaking, ordinary mathematics can only solve very precise problems, such as the length and width of a thing, which are mostly objective judgments.

Fuzzy mathematics uses given conditions to make similar subjective judgments, such as whether a person is tall or short, fat or thin, like father or mother and so on.

I remember when we took the fuzzy mathematics exam, the last question was to judge whether a child was like his father or his mother. A classmate in my class answered like a neighbor.