1
as in delusion
a false idea or belief
the once-common fallacy that girls just weren't any good at math
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in deception
the quality or state of being false
the fallacy of the notion of spontaneous generation was demonstrated by the Dutch naturalist Leeuwenhoek
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of fallacy
The biggest fallacy in B2B marketing is the idea of business-to-business itself.
—
Expert Panel®, Forbes.com, 11 Sep. 2025
For example, a common fallacy is the belief that things were better in some imagined past.
—Zach Helfand, New Yorker, 25 Aug. 2025
And another is the slippery slope of logical fallacy.
—Shaon Lahiri, The Conversation, 7 July 2025
That’s a nearly identical sum to the amount Fox agreed to pay to Dominion Voting Systems in a 2023 settlement over the channel’s airing of conspiracy theories around Dominion’s voting machines, that fueled the fallacy that Trump won the 2020 presidential election.
—Ethan Baron, Mercury News, 27 June 2025
See All Example Sentences for fallacy
Expert Panel®, Forbes.com, 11 Sep. 2025
For example, a common fallacy is the belief that things were better in some imagined past.
—Zach Helfand, New Yorker, 25 Aug. 2025
And another is the slippery slope of logical fallacy.
—Shaon Lahiri, The Conversation, 7 July 2025
That’s a nearly identical sum to the amount Fox agreed to pay to Dominion Voting Systems in a 2023 settlement over the channel’s airing of conspiracy theories around Dominion’s voting machines, that fueled the fallacy that Trump won the 2020 presidential election.
—Ethan Baron, Mercury News, 27 June 2025
See All Example Sentences for fallacy
Recent Examples of Synonyms for fallacy
Noun
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For an in-depth look at AI psychosis and especially the co-creation of delusions via human-AI collaboration, see my recent analysis at the link here.—
Lance Eliot,
Forbes.com,
7 Sep. 2025
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If someone is already at risk of paranoia or delusions, AI may validate their thoughts in a way that intensifies their beliefs.—
Alyssa Goldberg,
USA Today,
4 Sep. 2025
Noun
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Advances in deception and seeking technologies will further shape this contest, as each side works to reduce the effectiveness of the other’s systems.—
Vikram Mittal,
Forbes.com,
9 Sep. 2025
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Minnesota’s Public Safety Commissioner Bob Jacobson condemned the deception and affirmed how troubling the ambush was.—
Stepheny Price,
FOXNews.com,
7 Sep. 2025
Noun
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The Cortège Out on the cricket fields at The Los Angeles Equestrian Center, an experiential open-air event is bringing together dance, sound, light, puppetry, costume, myth, and robotic canines.—
David Hochman,
Forbes.com,
14 Sep. 2025
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The myth of Chinese tunnels has circulated for more than a century.—
Beth Lew-Williams,
New Yorker,
13 Sep. 2025
Noun
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Of course, the retort is that this would be irritating and exasperating to be continually deluged with alerts about AI deceptiveness.—
Lance Eliot,
Forbes.com,
24 Aug. 2025
Noun
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An aircraft flying without GPS can accumulate miles of error in just hours.—
Kapil Kajal,
Interesting Engineering,
11 Sep. 2025
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FanDuel acknowledged the error in the way the game score was displayed and pinned it on a third-party provider.—
Contessa Brewer,Alex Sherman,
CNBC,
11 Sep. 2025
Noun
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Of course, such high-tech innovations, providing the illusion of a social environment, have both pluses and minuses.—
Alan Lightman
September 12,
Literary Hub,
12 Sep. 2025
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Shatter your illusions of love?—
Ed Masley,
AZCentral.com,
11 Sep. 2025
Noun
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An advocate for free speech and limited government, Kirk also used his sizable platform to spread falsehoods and conspiracy theories about topics including climate change, vaccines, transgender people and demographic change.—
Rachel Treisman,
NPR,
11 Sep. 2025
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Kirk spread falsehoods about voter fraud during the 2020 election and misinformation about the COVID-19 vaccine.—
ABC News,
ABC News,
10 Sep. 2025
Cite this Entry
“Fallacy.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/fallacy. Accessed 16 Sep. 2025.
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