There are four fools on the mountain. They are hopeless.

This is a cold joke, save, you save (only) four (yes) fools. If you don't save, you can't save (just) four (yes) fools.

A cold joke means that the joke itself is boring, homophonic, translated, or omitting the theme, different logic, judgment or special content, or because of the performer's mood or expression, and it is difficult to make people laugh, but it does not mean that the joke itself is boring, which is also a manifestation of humor.

Nowadays, most people laugh when they hear cold jokes, and sometimes they make a gesture of hugging their arms: "It's so cold!" " Or words and expressions related to cold semantics, such as chills, temperature, air conditioning or hot weather.