Where does phrase Catch 22 come from

The phrase catch 22 was derived from the book write by joseph heller.Now, we have got the complete detailed explanation and answer for everyone, who is interested!A catch is a small but important detail that changes a situation, makes it less appealing or more problematic than it seems at first.A set of circumstances in which one requirement, etc., is dependent upon.What does catch 22 expression mean?

To be deemed insane, a pilot must request to be evaluated.The 22 by itself doesn't have a separate meaning.The phrase basically means if you can do it, you really can't do it, and.This is a question our experts keep getting from time to time.A catch 22 situation is one in which:

Does the phrase catch 22 mean?