catch 22的意思，由来和用法，最好是英文的

catch-22”原来是一条军规，用来形容：A situation in which a desired outcome or solution is impossible to attain because of a set of inherently illogical rules or conditions。

因为天生不合逻辑的规则或条件导致的，所希望得到的愿望和解释不可能达到的状况。

就如jesoph heller的书“catch22"(第二十二条军规）故事发生在1944年的意大利的一个美国空军基地。有个叫Yossarian的军官千方百计想离开战场，他找到了军医，希望医生能出具证明说明他身体状况不允许驾驶飞机。医生说，想不飞行，除非你疯了，我才能出证明；但是如果你疯了，你就会不断的飞行。装疯的Yossarian脑子可是一点都不疯，这是一个悖论，catch-22，他无论如何也无法摆脱对战争对飞行的恐惧，除非他死掉。

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.

The title is a reference to a bureaucratic catch, which embodies multiple forms of illogical and immoral reasoning seen throughout the book; and which itself is an absurd joke: namely, that bureaucratic nonsense has gotten to such a high level that even the catches are