fallacious

Adjective
Synonyms: unsounddeceitfulfraudulent

WordNet 3.0

Adjective (3)

  1. containing or based on a fallacy“fallacious reasoning”“an unsound argument”Synonyms: unsound
  2. intended to deceive“deceitful advertising”“fallacious testimony”“smooth, shining, and deceitful as thin ice — S.T.Coleridge”“a fraudulent scheme to escape paying taxes”Synonyms: deceitfulfraudulent
  3. based on an incorrect or misleading notion or information“fallacious hope”
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Webster's Dictionary (GCIDE)

Fallacious \Fal*la"cious\, a. [L. fallaciosus, fr. fallacia: cf. F. fallacieux. See Fallacy.] Embodying or pertaining to a fallacy; illogical; fitted to deceive; misleading; delusive; as, fallacious arguments or reasoning. -- Fal*la"cious*ly, adv. -Fal*la"cious*ness, n. [1913 Webster]
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