Fallacious and True

Opposite meaning words

Fallacious adjective - Not using or following good reasoning.

Usage example: it's fallacious to say that something must exist because science hasn't proven its nonexistence

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True is an antonym for fallacious in false topic.

True adjective - Being exactly as appears or as claimed.

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Fallacious is an antonym for true.

This is most impressive when Brian patiently deconstructs fallacious logic and explains that even if every demented thing the correspondent has claimed about the world were true it still wouldn't change the scientific validity of what he said in the episode.

Source: Podcast / Skeptoid
Consequential arguments are generally not fallacious if used in decision making with something that cannot be objectively provable - i.e., (desirable/undesirable, or morally right/morally wrong, not is it true).

Source: Appeal to Consequences
Their method of communication is structured in such a way that any logical error is necessarily a syntactical error as well, meaning that if a group of Lambertians is told a fallacious argument, they will notice the error within a matter of minutes and then tell you what's really true.

Source: Can't Argue with Elves

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True and Fallacious. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/fallacious/true

Fallacious & True. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/fallacious/true>.

True or Fallacious. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/fallacious/true.

Google Ngram Viewer shows how "fallacious" and "true" have occurred on timeline