Appeal to nature

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An appeal to nature is a logical fallacy by which it is argued that because something is "natural" it is automatically morally desirable or "good". Sometimes the argument appears in reverse form: that because something is not found "in nature", it must be morally repugnant or evil.


  • Everybody should eat meat, because humans evolved to eat meat.
  • Homosexuality is not natural; therefore it is wrong to be homosexual.