Catch-22 is usually used as a concept when referring to circular logic or circular reasoning. Catch-22 is a satirical, historical novel by the American author Joseph Heller, first published in 1961. The novel, set during the later stages of World War II from 1943 onwards, is frequently cited as one of the great literary works of the twentieth century.
There was only one catch and that was Catch-22, which specified that a concern for one's 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.
Other forms of Catch-22 are invoked throughout the novel to justify various bureaucratic actions. At one point, victims of harassment by military police quote the MPs' explanation of one of Catch-22's provisions: "Catch-22 states that agents enforcing Catch-22 need not prove that Catch-22 actually contains whatever provision the accused violator is accused of violating." Another character explains: "Catch-22 says they have a right to do anything we can’t stop them from doing." The theme of a bureaucracy marginalizing the individual in an absurd way is similar to the world of Kafka's 'Trial', and George Orwell's '1984.' The concept of "double think" has definite echoes in Heller's work.