a catch-22 situation
a catch-22 situationa dilemma or difficulty from which there is no escape because of mutually conflicting or dependent conditions.
The classic statement of this situation is in Joseph Heller 's novel Catch-22 ( 1961 ), from which the expression is taken: ‘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.’
1997 New Scientist It's a catch-22 situation: you cannot get the job without having the relevant experience and you cannot get the experience without having first done the job.
See also: situation