What is a "Catch 22" ?

[OldSchool]

Hoping you live longer than your dog?

 

[Supervisor42]

Hoping you live longer than your dog?

It dates back to a 1970 movie, Catch-22:
Nutshell:
The only way to get out of the military was to be declared insane... However:

Futilely appealing to Cathcart, Yossarian learns that even a mental breakdown is no release when Doc Daneeka explains the "Catch-22" the Army Air Force employs:.. ..An airman would have to be crazy to fly more missions, and if he were crazy, he would be unfit to fly. Yet, if an airman were to refuse to fly more missions, this would indicate that he is sane, which would mean that he would be fit to fly the missions. The airman is thus in an impossible "damned if you do, damned if you don't" situation.

 

[OldSchool]

I thought it simply meant: No win situation.