Makes perfect illogical sense.
“”You mean there’s a catch?”
“Sure there’s a catch”, Doc Daneeka replied. “Catch-22. Anyone who wants to get out of combat duty isn’t really crazy.”
There was only one catch and that was Catch-22, which specified that a concern for one’s own safety in the face of dangers that were real and immediate was the process of a rational mind. Orr was crazy and could be grounded. All he had to do was ask; and as soon as he did, he would no longer be crazy and would have to fly more missions. Orr would be crazy to fly more missions and sane if he didn’t, but if he was sane, he had to fly them. If he flew them, he was crazy and didn’t have to; but if he didn’t want to, he was sane and had to. Yossarian was moved very deeply by the absolute simplicity of this clause of Catch-22 and let out a respectful whistle.”
The old woman talks to Yossarian:
“Catch-22 says they have a right to do anything we can’t stop them from doing.”
“What the hell are you talking about?” Yossarian shouted at her in bewildered, furious protest. “How did you know it was Catch-22? Who the hell told you it was Catch-22?”
“The soldiers with the hard white hats and clubs. The girls were crying. ‘Did we do anything wrong?’ they said. The men said no and pushed them away out the door with the ends of their clubs. ‘Then why are you chasing us out?’ the girls said. ‘Catch 22,’ the men said. All they kept saying was ‘Catch-22, Catch-22. What does it mean, Catch 22? What is Catch-22?”
“Didn’t they show it to you?” Yossarian demanded, stamping about in anger and distress. “Didn’t you even make them read it?”
“They don’t have to show us Catch-22,” the old woman answered. “The law says they don’t have to.”
“What law says they don’t have to?”
“Catch-22”.
I think the movie ‘Catch 22’ also had a mailman school, you could get a degree in anything there./sarc