Definition of fallacy in English:

fallacy

Syllabification: fal·la·cy
Pronunciation: /ˈfaləsē
 
/

noun (plural fallacies)

  • 1A mistaken belief, especially one based on unsound argument: the notion that the camera never lies is a fallacy
    More example sentences
    • What binds all these things together is a recurring human mistake: the fallacy of total belief in the present and its technology.
    • I can't summon the necessary faith to believe in magic if I suspect it's inconsistent nonsense, or a mess of superstitions based on fallacies.
    • It is based on myths and fallacies which provide legitimacy for gross social inequalities.
    Synonyms
    misconception, misbelief, delusion, mistaken impression, error, misapprehension, misinterpretation, misconstruction, mistake; untruth, inconsistency, myth
  • 1.1 Logic A failure in reasoning that renders an argument invalid.
    More example sentences
    • Finally, yet another theory of fallacy says a fallacy is a failure to provide adequate proof for a belief, the failure being disguised to make the proof look adequate.
    • So the knowledge argument is invalid because it involves a fallacy of equivocation: ‘know’ means something different in the two premises.
    • Dretske has denied that knowledge is closed under implication; further, he has diagnosed closure as the fallacy that drives arguments for scepticism.
  • 1.2Faulty reasoning; misleading or unsound argument: the potential for fallacy which lies behind the notion of self-esteem
    More example sentences
    • I was under the impression that this was a forum where political issues could be discussed rationally: if you want me to be pedantic and point out every logical fallacy in every reply I've received then I'll do that.
    • Predictably, the appeal to personal experience is another well-known logical fallacy.
    • The little logical fallacy that bugged me the most was the scene where the earthquake followed the Amtrak train.

Origin

late 15th century (in the sense 'deception, guile'; gradually superseding Middle English fallace): from Latin fallacia, from fallax, fallac- 'deceiving', from fallere 'deceive'.

More definitions of fallacy

Definition of fallacy in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day coloratura
Pronunciation: ˌkələrəˈto͝orə
noun
elaborate ornamentation of a vocal melody