How to distinguish between cold jokes and hot jokes?

Cold joke: In fact, it is a joke that is not funny at all, a boring joke, but it can achieve the purpose of mental relaxation, because it is not easy to understand. Cold jokes generally go beyond conventional thinking, do not conform to logic and real life, and make people feel dumbfounded.

"Hot joke": that is, we generally recognize the joke. Humorous words and clever language organization will make you laugh after listening. Such as: cross talk, sketches and the like.