Definition of fallacy noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈfæləsi//
    ; NAmE NAmE//ˈfæləsi//
    (pl. fallacies)
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  1. 1[countable] a false idea that many people believe is true It is a fallacy to say that the camera never lies.
  2. 2[uncountable, countable] a false way of thinking about something He detected the fallacy of her argument.
  3. see also pathetic fallacy
    Word Originlate 15th cent. (in the sense ‘deception, guile’; gradually superseding Middle English fallace): from Latin fallacia, from fallax, fallac- ‘deceiving’, from fallere ‘deceive’.Extra examples It’s a fallacy to say that the camera never lies. The idea that all women want children is a common fallacy. There’s a widespread fallacy that longer working hours mean increased productivity.
See the Oxford Advanced American Dictionary entry: fallacy

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