1
as in unreasonable
not using or following good reasoning
it's fallacious to say that something must exist because science hasn't proven its nonexistence
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Antonyms & Near Antonyms
2
as in misleading
tending or having power to deceive
consumers who harbor the fallacious belief that credit-card spending will never catch up with them
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Example Sentences
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Recent Examples of fallacious
The same economists who believe in the same fallacious economic notions?
—
John Tamny, Forbes.com, 6 July 2025
Lawyers who argued for his ouster on behalf of the National Assembly said the claims by Mr. Yoon were fallacious.
—Choe Sang-Hun, New York Times, 1 Apr. 2025
That will in turn spread on social media, which often plays a disproportional role in boosting these disinformation efforts by providing nearly unlimited platforms for unfiltered content and fallacious and deceptive claims.
—Peter Suciu, Forbes, 23 Dec. 2024
There might be a bigger market for these products, and more consumers might be immune to the fallacious argument that they’re overly processed, if more people were persuaded of the ills of factory farming.
—Kenny Torrella, Vox, 7 Dec. 2018
See All Example Sentences for fallacious
John Tamny, Forbes.com, 6 July 2025
Lawyers who argued for his ouster on behalf of the National Assembly said the claims by Mr. Yoon were fallacious.
—Choe Sang-Hun, New York Times, 1 Apr. 2025
That will in turn spread on social media, which often plays a disproportional role in boosting these disinformation efforts by providing nearly unlimited platforms for unfiltered content and fallacious and deceptive claims.
—Peter Suciu, Forbes, 23 Dec. 2024
There might be a bigger market for these products, and more consumers might be immune to the fallacious argument that they’re overly processed, if more people were persuaded of the ills of factory farming.
—Kenny Torrella, Vox, 7 Dec. 2018
See All Example Sentences for fallacious
Recent Examples of Synonyms for fallacious
Adjective
-
Chicago residents must not be subject to unreasonable searches and seizures.—
Tracy Baim,
Chicago Tribune,
29 Mar. 2026
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As in Williams’ case, attorneys argued that a sweep had violated the plaintiffs’ Fourth Amendment rights protecting them from unreasonable search and seizure, as well as their 14th Amendment right to due process.—
Ariane Lange,
Sacbee.com,
24 Mar. 2026
Adjective
-
Winds high above Saturn were generating electrical currents, creating a misleading auroral signal that mimicked changes in rotation.—
Rupendra Brahambhatt,
Interesting Engineering,
28 Mar. 2026
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Parts of the ballot language backing a tax on second homes in San Diego are misleading and must be amended, a judge ruled Thursday.—
Roxana Popescu,
San Diego Union-Tribune,
27 Mar. 2026
Adjective
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There’s something both early American and midcentury modern in the design of these solid-oak vanities, which arrived just as everyone seems to have gotten over an irrational fear of brown furniture.—
Nicole Hoey,
Robb Report,
31 Mar. 2026
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The answer turned out to be four more years of sacrifice, struggle, and hope that must have felt, at times, completely irrational.—
Sharon McMahon,
Glamour,
25 Mar. 2026
Adjective
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Also, offering free samples is deceptive marketing, due to evidence that 7-OH is addictive.—
Jack Harvel,
Kansas City Star,
31 Mar. 2026
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Set in the heart of Midtown Manhattan, the grandiosity of MoMA is deceptive.—
Condé Nast,
Condé Nast Traveler,
30 Mar. 2026
Adjective
-
Bainbridge knew about secrets and unreasoning shame.—
Christopher Tayler,
Harpers Magazine,
27 Jan. 2026
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Let sound political prescience but take the place of an unreasoning prejudice, and this will be done.—
Frederick Douglass,
The Atlantic,
16 Aug. 2017
Adjective
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Five of the cases involved hospice care facilities in several cities across Los Angeles County that submitted false claims to Medicare for patients who were not terminally ill and were not eligible for services, prosecutors said.—
Thao Nguyen,
USA Today,
3 Apr. 2026
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This means that precious time was likely lost at the beginning as police investigated a lead that was based on false assumptions.—
Lizzie Lanuza,
StyleCaster,
3 Apr. 2026
Adjective
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Outside the courthouse in Manhattan, small groups of supporters have denounced the trial as illegitimate.—
Antonio María Delgado,
Miami Herald,
30 Mar. 2026
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Beatdapp, a firm specializing in streaming fraud detection, estimates fraudulent music streams generate approximately $2 billion in diverted, illegitimate royalties every year.—
Kyle Eustice,
VIBE.com,
30 Mar. 2026
Adjective
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In each case, the actual right to your body is deferred to some third party, either the paternalists, the hypothetical children, or unreasoned authority.—
Kyle Munkittrick,
Discover Magazine,
20 June 2011
Cite this Entry
“Fallacious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/fallacious. Accessed 5 Apr. 2026.
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