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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Wikipedia
en.wikipedia.org › wiki › Fallacy
Fallacy - Wikipedia
1 week ago - 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 intellectual tradition by the Aristotelian De Sophisticis Elenchis. Fallacies in reasoning may be invoked ...
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Merriam-Webster
merriam-webster.com › dictionary › fallacy
FALLACY Definition & Meaning - Merriam-Webster
3 days ago - Philosophers are constantly using the word fallacy. For them, a fallacy is reasoning that comes to a conclusion without the evidence to support it.
Discussions

What are fallacies and could someone explain it to me?
Fallacy theory (the frameworks from which we derive various fallacy lists) are tools to help us conceptualize what would be in and out of bounds for certain kinds of disputes or arguments. They lay out what kinds of arguments we should accept and/or should make in certain contexts. Generally, this means that fallacies are usually types of arguments that look acceptable, but aren’t - and so we should watch out for them so as to avoid making or accepting them. https://plato.stanford.edu/entries/fallacies/ More on reddit.com
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May 18, 2025
ELI5: What is a fallacy?
A fallacy is the use of poor, or invalid, reasoning for the construction of an argument. This is different than just an argument that is simply factually incorrect, it is about an argument that makes an error in logic or makes assumptions that should not have been made (either intentional or unintentional). In the formal setting, an argument is two sides presenting their sides use logic and deductive reasoning. It's akin to a game and fallacies are something like a penalty (hence the current front page post with the ref) More on reddit.com
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July 13, 2015
Is this a fallacy? If so, what is it called?
Others have provided the name of the fallacy. However, if you intend on refuting someone who throws "why don't you do it yourself?" at you, it could make you look smug to just name a fallacy. Sometimes it's better to attack the argument and provide a counter-example : Expertise in an area is not always necessary to recognize poor performance in that area. You don't have to know how to cook, let alone cook well, to know that a dish is too salty. More on reddit.com
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July 6, 2014
A Guide To Logical Fallacies
Hmmm, I certainly have never seen politicians use any of these fallacies More on reddit.com
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People also ask

Is appeal to ignorance a logical fallacy?
An appeal to ignorance (ignorance here meaning lack of evidence) is a type of informal logical fallacy. · It asserts that something must be true because it hasn’t been proven false—or that something must be false because it has not yet been proven true. · For example, “unicorns exist because there is no evidence that they don’t.” The appeal to ignorance is also called the burden of proof fallacy.
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scribbr.com
scribbr.com › home › logical fallacies | definition, types, list & examples
Logical Fallacies | Definition, Types, List & Examples
Is ad hominem a logical fallacy?
An ad hominem (Latin for “to the person”) is a type of informal logical fallacy. Instead of arguing against a person’s position, an ad hominem argument attacks the person’s character or actions in an effort to discredit them. · This rhetorical strategy is fallacious because a person’s character, motive, education, or other personal trait is logically irrelevant to whether their argument is true or false. · Name-calling is common in ad hominem fallacy (e.g., “environmental activists are ineffective because they’re all lazy tree-huggers”).
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scribbr.com
scribbr.com › home › logical fallacies | definition, types, list & examples
Logical Fallacies | Definition, Types, List & Examples
What is the difference between cognitive bias and logical fallacy?
People sometimes confuse cognitive bias and logical fallacies because they both relate to flawed thinking. However, they are not the same: · Cognitive bias is the tendency to make decisions or take action in an illogical way because of our values, memory, socialization, and other personal attributes. In other words, it refers to a fixed pattern of thinking rooted in the way our brain works. · Logical fallacies relate to how we make claims and construct our arguments in the moment. They are statements that sound convincing at first but can be disproven through logical reasoning. · In other word
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scribbr.com
scribbr.com › home › logical fallacies | definition, types, list & examples
Logical Fallacies | Definition, Types, List & Examples
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Internet Encyclopedia of Philosophy
iep.utm.edu › fallacy
Fallacies | Internet Encyclopedia of Philosophy
Some researchers, although not most, use the term “fallacy” very broadly to indicate any false belief or cause of a false belief. The long list below includes some fallacies of these sorts if they have commonly-known names, but most are fallacies that involve kinds of errors made while arguing informally in natural language, that is, in everyday discourse.
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StudioBinder
studiobinder.com › scriptwriting › what is a fallacy — definition, types, and examples
What is a Fallacy — Definition, Types, and Examples
November 22, 2025 - A fallacy, as used in the realm of logic and argumentation, refers to a flawed argument or reasoning that appears superficially sound.
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Reddit
reddit.com › r/askphilosophy › what are fallacies and could someone explain it to me?
r/askphilosophy on Reddit: What are fallacies and could someone explain it to me?
May 18, 2025 -

I have been learning about logical fallacies, like appeal to authority, strawman, cherry picking etc and they are great in pointing out flaws in an individuals logical thinking. However, then what is the point of having debates and arguments if technically a lot of us also commit them without knowing? Or how people fall into traps of politicians like Trump who obviously has a lot of fallacies. Are fallacies there to strengthen our critical thinking and improve our arguments? What is there purpose?

Find elsewhere
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Encyclopedia Britannica
britannica.com › philosophy & religion › philosophical issues
Fallacy | Logic, Definition & Examples | Britannica
1 month ago - Fallacy, in logic, erroneous reasoning that has the appearance of soundness. In logic an argument consists of a set of statements, the premises, whose truth supposedly supports the truth of a single statement called the conclusion of the argument.
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The Writing Center
writingcenter.unc.edu › home › tips & tools › fallacies
Fallacies – The Writing Center
December 29, 2011 - Please be aware that the claims in these examples are just made-up illustrations—they haven’t been researched, and you shouldn’t use them as evidence in your own writing. Fallacies are defects that weaken arguments.
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Scribbr
scribbr.com › home › logical fallacies | definition, types, list & examples
Logical Fallacies | Definition, Types, List & Examples
October 9, 2023 - A logical fallacy is an argument that may sound convincing or true but is actually flawed, leading to an unsupported conclusion.
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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
This material may not be published, reproduced, broadcast, rewritten, or redistributed without permission. Use of this site constitutes acceptance of our terms and conditions of fair use. Fallacies are common errors in reasoning that will undermine the logic of your argument.
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Medium
medium.com › @3valuedlogic › what-is-a-fallacy-bb5bbbfcb397
What is a fallacy?
December 17, 2022 - In Mastering Logical Fallacies, Withey (p.11) writes “[w]hen an argument goes wrong, its because its proponent has committed a fallacy.” On this definition, an argument isn’t “bad” simply because someone doesn’t like it. So, it must be bad because it fails to meet some objective standards.
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HKU Philosophy
philosophy.hku.hk › think › fallacy › fallacy.php
[F01] What is a fallacy
Fallacies are mistakes of reasoning, as opposed to making mistakes that are of a factual nature. If I counted twenty people in the room when there were in fact twenty-one, then I made a factual mistake. On the other hand, if I believe that there are round squares, I am believing something that ...
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Cambridge Dictionary
dictionary.cambridge.org › us › dictionary › english › fallacy
FALLACY | definition in the Cambridge English Dictionary
FALLACY meaning: 1. an idea that a lot of people think is true but is in fact false: 2. an idea that a lot of…. Learn more.
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Quora
quora.com › What-is-the-definition-of-a-fallacy-Do-you-think-that-every-argument-must-have-at-least-one-fallacy-in-it-to-be-considered-valid-Why-or-why-not
What is the definition of a fallacy? Do you think that every argument must have at least one fallacy in it to be considered valid? Why or why not? - Quora
Answer (1 of 6): I'm going to assume you're being honest in your question. I have to start here: validity of an argument addresses the structure of an argument in that the premises lead to the conclusion even if the premises are untrue. For example: 1. All bikers are black 2. I am a biker 3. I ...
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Daily Philosophy
daily-philosophy.com › what-is-a-fallacy
What is a Fallacy? | Daily Philosophy
December 13, 2023 - A fallacy in Critical Thinking is an error in argumentation that makes an argument invalid.
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UT Miners
utminers.utep.edu › omwilliamson › engl1311 › fallacies.htm
Master List of Logical Fallacies
Master List of Logical Fallacies · Fallacies are fake or deceptive arguments, "junk cognition," that is, arguments that seem irrefutable but prove nothing. Fallacies often seem superficially sound and they far too often retain immense persuasive power even after being clearly exposed as false.
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Wikipedia
en.wikipedia.org › wiki › List_of_fallacies
List of fallacies - Wikipedia
5 days ago - For a compound proposition to be ... to yield true conclusions. Types of propositional fallacies: Affirming a disjunct – concluding that one disjunct of a logical disjunction must be false because the other disjunct is true; A or B; A, therefore not B....
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Quora
quora.com › What-does-fallacy-mean-and-what-are-some-examples
What does fallacy mean, and what are some examples? - Quora
Answer (1 of 11): In the broadest sense of the term, a fallacy is simply a common incorrect idea. Basically a common misconception. For instance the idea that fortune cookies are part of Chinese culture is a common fallacy by this meaning.