It will come as no surprise that fallacious is related to the noun fallacy, meaning “delusion” or “falsehood.” Both words come from the Latin word fallacia, which in turn comes from fallere, meaning “to deceive.” (Other descendants of fallere in English include fail, false, and fault.) 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.

FALLACIOUS definition: containing a fallacy; logically unsound. See examples of fallacious used in a sentence.

FALLACIOUS definition: 1. not correct: 2. not correct: . Learn more.

Fallacious comes ultimately from the Latin fallax, "deceptive." The word fallacious might describe an intentional deception or a false conclusion coming from bad science or incomplete understanding.

Facts and reason have to square off against the fanciful and the fallacious. — Jim Rutenberg, New York Times, 14 June 2017 · So my guess is that that ruling will be in favor of the aggrieved party in a fallacious ad. — Steven Levy, Wired, 28 Jan. 2020 · The thought that momentum carries over from game to game in the Stanley Cup playoffs is fallacious. — Eric Stephens, Orange County Register, 7 May 2017 · But this is based on the fallacious notion that depletion of the resource means ever-higher prices.

fallacious [=misleading] arguments · [+] more examples [-] hide examples [+] Example sentences [-] Hide examples · adverb · noun [noncount] ASK THE EDITOR · QUIZZES · Vocabulary Quiz · Test your word power · Take the Quiz » · Name That Thing · Take our visual quiz ·

Nor does the process of acquiring the premisses of eristical syllogism, which is fallacious either in its premisses or in its process, differ, except that, when the premisses are fallacious, the dialectical interrogations must be such as to cause this fallacy. ... All M is P. Proceeding from one order to the other, by converting one of the premises, and substituting the conclusion as premise for the other premise, so as to deduce the latter as conclusion, is what he calls circular inference; and he remarked that the process is fallacious unless it contains propositions which are convertible, as in mathematical equations.

We welcome feedback: report an example sentence to the Collins team. Read more… But the analogy is fallacious. Wall Street Journal (2023) Waxing indignant by way of a period piece is fallacious in a number of ways. Wall Street Journal (2023)The second fallacious notion is that work is supposed to be fun. Wall Street Journal (2023)First, there are those words which spring from fallacious theories, such as the element of fire or the concept of a first mover.

Synonyms for FALLACIOUS: unreasonable, irrational, unreasoning, illegitimate, misleading, unreasoned, illogical, absurd; Antonyms of FALLACIOUS: reasonable, logical, valid, rational, sound, wise, sensible, justified

The word “vise” comes from the Latin “that which winds,” so it means anything that winds. Since a hurricane winds around its own eye, it is a vise. The Fallacy of Every and All turns on errors due to the order or scope of the quantifiers “every” and “all” and “any.” This is a version of the Scope Fallacy. ... Every action of ours has some final end. So, there is some common final end to all our actions. In proposing this fallacious argument, Aristotle believed the common end is the supreme good, so he had a rather optimistic outlook on the direction of history.

April 10, 2023 - That way, they’ll stick out to you when you’re reading your first draft, and you’ll see exactly where your writing needs thoughtful revision. As you’ll see below, there are a lot of ways an argument can be flawed. Take a look at fifteen of the most commonly used logical fallacies. An ad hominem fallacy is one that attempts to invalidate an opponent’s position based on a personal trait or fact about the opponent rather than through logic. Example: Katherine is a bad choice for mayor because she didn’t grow up in this town.

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

April 22, 2025 - Today, “fallacious” is commonly applied to arguments that use faulty logic, whether intentionally deceptive or simply mistaken. ... Usage note: Fallacious emphasizes incorrect reasoning, often implying an argument that may sound convincing ...

2 days ago - Even non-deductive arguments can be said to be fallacious: for example, an inductive argument that incorrectly applies principles of probability or causality. But "since deductive arguments depend on formal properties and inductive arguments don't, formal fallacies apply only to deductive arguments". A logical form such as "A and B" is independent of any particular conjunction of meaningful propositions.

The idea that nuclear power can solve the coming energy crisis is therefore totally fallacious. And skeptics then make the logically fallacious jump of concluding that the biblical record is indefensible!

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The best choice depends on the ... untrue or incorrect, while "fallacious" specifically refers to an argument or reasoning that contains a flaw in its logic, even if the conclusion happens to be true....

Find 59 different ways to say FALLACIOUS, along with antonyms, related words, and example sentences at Thesaurus.com.

Avoid these common fallacies in your own arguments and watch for them in the arguments of others. Slippery Slope: This is a conclusion based on the premise that if A happens, then eventually through a series of small steps, through B, C,..., X, Y, Z will happen, too, basically equating A and Z. So, if we don't want Z to occur, A must not be allowed to occur either. Example:

May 29, 2015 - On one reading it can be taken to mean that it is the police who have been drinking and are now to stop it; this makes for a plausible argument. On another reading what is meant is that the police were told to stop others (e.g., students) from drinking after midnight. If that is the sense in which the premise is intended, then the argument can be said to be a fallacy because despite initial appearances, it affords no support for the conclusion. 3 & 4. The fallacies of composition and division occur when the properties of parts and composites are mistakenly thought to be transferable from one to the other.