| Summary | When people use the expression “UFO”, whether it be in a book, a documentary, a newspaper article, on a website, or on YouTube, there is an implicit assumption that the meaning is actually understood, and that everyone agrees on such meaning. The fact is that it is not the case. “UFO” has many implicit meanings. How people define UFOs, in turn, tells us a lot about the various ways of thinking about the topic, and more particularly helps identifying clusters of authors thinking along the same li |
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