use of invalid or otherwise faulty reasoning in the construction of an argument
Fallacy - Wikipedia
classification of fallacies: (1) material, (2) verbal, and (3) formal
A fallacy is the use of invalid or otherwise faulty reasoning in the construction of an argument that may appear to be well-reasoned if unnoticed. The term was introduced in the Western … Wikipedia
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Merriam-Webster
merriam-webster.com › sentences › fallacious
Examples of 'FALLACIOUS' in a Sentence | Merriam-Webster
Problem is, the water ice on Pluto is mixed up with ices of methane, nitrogen, and carbon monoxide—which kind of hides the actual H2O. The image to the left shows this fallacious five o’clock shadow of water ice. — Nick Stockton, WIRED, 29 Jan.
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Grammarly
grammarly.com › blog › rhetorical-devices › logical-fallacies
15 Logical Fallacies to Know, With Definitions and Examples
April 10, 2023 - These are just a few examples of common logical fallacies (appeal to hypocrisy, appeal to ignorance, and sunk cost, respectively) we encounter in everyday speech.
People also ask

What is a logical fallacy?
A logical fallacy is an argument that can be disproven through reasoning.
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grammarly.com
grammarly.com › blog › rhetorical-devices › logical-fallacies
15 Logical Fallacies to Know, With Definitions and Examples
Why do people use logical fallacies?
People use logical fallacies for different reasons. In some cases, speakers and writers intentionally use logical fallacies in an effort to make their opposition look worse, to simplify an issue, or make their own position look superior. In other cases, people use them unintentionally, either because they haven’t thought their statements through or don’t understand why their arguments are logically flawed.
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grammarly.com
grammarly.com › blog › rhetorical-devices › logical-fallacies
15 Logical Fallacies to Know, With Definitions and Examples
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Wikipedia
en.wikipedia.org › wiki › List_of_fallacies
List of fallacies - Wikipedia
5 days ago - For example, in an organic foods advertisement that says "Organic foods are safe and healthy foods grown without any pesticides, herbicides, or other unhealthy additives", the terms "safe" and "healthy" are used to fallaciously imply that non-organic foods are neither safe nor healthy.
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Internet Encyclopedia of Philosophy
iep.utm.edu › fallacy
Fallacies | Internet Encyclopedia of Philosophy
Multiple names of fallacies are often grouped together under a common name intended to bring out how the specific fallacies are similar. Here are three examples. (1) Fallacies of relevance include fallacies that occur due to reliance on an irrelevant reason. There are different kinds of these fallacies.
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Purdue OWL
owl.purdue.edu › owl › general_writing › academic_writing › logic_in_argumentative_writing › fallacies.html
Fallacies - Purdue OWL® - Purdue University
In this example, the author assumes that if one event chronologically follows another the first event must have caused the second. But the illness could have been caused by the burrito the night before, a flu bug that had been working on the body for days, or a chemical spill across campus.
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Merriam-Webster
merriam-webster.com › dictionary › fallacious
FALLACIOUS Definition & Meaning - Merriam-Webster
Fallacious arguments are a hot topic among philosophers, and some classic examples include the “ad hominem” fallacy, the “slippery slope” fallacy, and the “red herring” fallacy.
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VIVA's Pressbooks
viva.pressbooks.pub › phi220ethics › chapter › identifying-fallacious-reasoning
Identifying Fallacious Reasoning – Ethics and Society
October 30, 2020 - Example: “A boy always serves as student-body president; a girl always serves as secretary.” · Loaded-Language and other emotionally charged uses of language: using slanted or biased language, including God terms, devil terms, euphemisms, ...
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The Writing Center
writingcenter.unc.edu › home › tips & tools › fallacies
Fallacies – The Writing Center
December 29, 2011 - Like post hoc, slippery slope can be a tricky fallacy to identify, since sometimes a chain of events really can be predicted to follow from a certain action. Here’s an example that doesn’t seem fallacious: “If I fail English 101, I won’t be able to graduate.
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Cambridge Dictionary
dictionary.cambridge.org › us › dictionary › english › fallacious
FALLACIOUS | definition in the Cambridge English Dictionary
5 days ago - It was a fallacious study to which the lemmings of society have subscribed because they have no practice thinking for themselves.
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Vocabulary.com
vocabulary.com › dictionary › fallacious
Fallacious - Definition, Meaning & Synonyms | Vocabulary.com
Something fallacious is a mistake that comes from too little information or unsound sources. Predictions that the whole state of California will snap off from the rest of North America and float away have proven to be fallacious — for now, anyway.
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Collins Dictionary
collinsdictionary.com › dictionary › english › fallacious
FALLACIOUS definition and meaning | Collins English Dictionary
2 weeks ago - The conclusion of your syllogism, I said lightly, is fallacious, being based upon licensed premisesFlann O'BrienAt Swim-Two-Birds ... Drag the correct answer into the box. ... Which or witch? They sound the same but mean different things. Learn how to use each correctly with simple explanations and examples.
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YourDictionary
sentence.yourdictionary.com › home › fallacious
Examples of "Fallacious" in a Sentence | YourDictionary.com
Heydweiller, 2 which appeared to indicate a reversal in weak fields (corresponding to I= 5, or thereabouts), have been shown by Honda and Shimizu to be vitiated by the fact that his specimen was not initially in a magnetically neutral state; they found that when the applied field had the same direction as that of the permanent magnetization, Heydweiller's fallacious results were easily obtained; but if the field were applied in the direction opposite to that of the permanent magnetization, or if, as should rightly be the case, there were no permanent magnetization at all, then there was no indication of any Villari reversal. ... The word usage examples above have been gathered from various sources to reflect current and historical usage.
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Sentence Dictionary
sentencedict.com › fallacious.html
Fallacious in a sentence (esp. good sentence like quote, proverb...)
July 24, 2020 - 35 sentence examples: 1. His argument is based on fallacious reasoning. 2. Their main argument is fallacious. 3. Such an argument is misleading, if not wholly fallacious. 4. Such a bill would be entirely fallacious. 5. Of course, continued Durieu, th
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Merriam-Webster
merriam-webster.com › thesaurus › fallacious
FALLACIOUS Synonyms: 187 Similar and Opposite Words | Merriam-Webster Thesaurus
January 25, 2026 - 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.
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Dictionary.com
dictionary.com › browse › fallacious
FALLACIOUS Definition & Meaning | Dictionary.com
He argued that the constitutional change had reset the clock to zero, but legal experts in Senegal and abroad dismissed the contention as fallacious.
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Stanford Encyclopedia of Philosophy
plato.stanford.edu › entries › fallacies
Fallacies (Stanford Encyclopedia of Philosophy)
May 29, 2015 - For example, in a context where a Yes or No answer must be given, the question, “Are you still a member of the Ku Klux Klan?” is a fallacy because either response implies that one has in the past been a member of the Klan, a proposition that may not have been established as true.
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Simple Book Publishing
open.library.okstate.edu › criticalthinking › chapter › __unknown__-3
Fallacies – Critical Thinking
September 1, 2019 - Similarly, suppose someone criticizes the Democratic Party’s call for direct elections in Hong Kong as follows: “These arguments supporting direct elections have no merit because they are advanced by Democrats who naturally stand to gain from it.” This is again fallacious because whether the person advancing the argument has something to gain from direct elections is a completely different issue from whether there ought to be direct elections. For example, it is not unusual for us to ignore or downplay criticisms because we do not like them, even when those criticisms are justified.
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Linguix
linguix.com › english › word › fallacious › examples
Use fallacious in a sentence | The best 94 fallacious sentence examples - GrammarDesk.com
He falls into a stupor, into utter oblivion of the world about him, becomes in turn excited and confused, his senses begin to functionate in a fallacious manner, and he thus succeeds in shutting out from consciousness, for the time being at least, the entire unbearable situation.
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Effectiviology
effectiviology.com › fallacy-fallacy
The Fallacy Fallacy: Why Fallacious Arguments Can Have True Conclusions – Effectiviology
For example, if someone fallaciously claimed that a certain medical treatment is preferable to alternatives because it’s more “natural”, the fallacy fallacy would occur if someone else claimed that this treatment must be worse than the alternatives, because the argument used to support it is fallacious.