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Another usage of the phrase was described and named by British philosopher G. E. Moore in his 1903 book Principia Ethica.
Moore stated that a naturalistic fallacy is committed whenever a philosopher attempts to prove a claim about ethics by appealing to a definition of the term " good " in terms of one or more natural properties ( such as " pleasant ", " more evolved ", " desired ", etc .).
Arthur N. Prior defined it as:

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