Pocket Thesaurus
Antonyms of fallacious
deceptive, delusive, erroneous, fictitious, fishy, fraudulent, illogical, illusory, incorrect, invalid, irrational, mad, misleading, mistaken, off, phony, spurious, unfounded, unreal, unreasonable, unsound, untrue, delusory, sophistic, unreasoned, beguiling, deceiving, deluding, reasonless, sophistical, ungrounded, way off
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