Definition

A term from aviation training referring to the Joint Aviation Authority's tendency to change or contradict factual information in their theoretical exam requirements for no logical reason. Pilots study procedures that don't match real-world practice and definitions that flip depending on which module you're in.

Example Usage

The meteorology exam had another jar-ism—they claim el-niño doesn't exist, which every actual meteorologist would dispute.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=jar-ism&defid=1622534)

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