Loophole - Wikipedia
https://en.m.wikipedia.org/wiki/Loophole
A loophole is an ambiguity or inadequacy in a system, such as a law or security, which can be used to circumvent or otherwise avoid the purpose, implied or explicitly stated, of the system. Originally, the word meant an arrowslit, a narrow vertical window in a wall through which an archer (or, later, gunman) could shoot. Loopholeswere commonly used in U.S. forts …
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