What is an appeal to authority fallacy, simply put?

It is saying “this is true because an important or famous person says so” when that person’s word is not good evidence on the point. It most often involves experts speaking outside their field, or one voice standing in for a whole discipline.

Is citing an expert always an appeal to authority fallacy?

No. Pointing to a relevant expert, or better still a consensus of experts, is a reasonable way to support a claim you cannot check yourself. It becomes fallacious when the authority is irrelevant, disputed, or used to shut down questions about the evidence.

Appeal to authority vs authority bias: what is the difference?

Authority bias is the psychological pull towards over-trusting people with status. The appeal to authority is the argument that exploits that pull, offering status as if it were proof. One is a habit of mind; the other is a move made in debate.

What is the Latin name for the appeal to authority?

It is often called argumentum ad verecundiam, loosely “the argument from modesty” or “from respect”, because it leans on a listener’s reluctance to question someone eminent. It is also known as argumentum ab auctoritate, the argument from authority.

Appeal to authority fallacy

Also called argument from authority, argumentum ad verecundiam · Logical fallacy · Relevance

An appeal to authority fallacy is treating someone’s status or reputation as proof of a claim, especially when they are not expert in the subject or experts broadly disagree. Expert opinion counts as evidence, but it is no substitute for reasons.

By the ReadGlobe Editors · Reviewed 2026-10-24

Why does the appeal to authority fallacy persuade?

Relying on experts is usually sensible: nobody can check everything personally, and specialists are right more often than amateurs within their own field. The shortcut fails when authority is borrowed from an unrelated field, when one dissenting voice is presented as settled opinion, or when a title is used to close a discussion instead of informing it. It works because credentials are easy to display and hard for a listener to assess on the spot. Citing a relevant consensus, such as guidance from a professional body, is generally reasonable rather than fallacious.

Examples of the appeal to authority fallacy

A cereal advert features an actor in a white coat recommending it for a healthy heart.
A famous entrepreneur’s offhand remark about nutrition is passed round the office as if it settled the matter.
In a planning meeting, the most senior person says, “I’ve done this for twenty years, so we’re doing it my way,” and the data never gets discussed.
A blog quotes one doctor who disagrees with mainstream medical guidance and calls the question “proven”.

How do you spot it and respond?

Check relevance: is this person an expert on this specific question, or on something else entirely?
Ask whether the view reflects broad agreement in the field or a single voice. A consensus carries far more weight than one name.
Request the reasons or evidence behind the expert’s view, so the argument can stand without the title attached.

Frequently asked

What is an appeal to authority fallacy, simply put?: It is saying “this is true because an important or famous person says so” when that person’s word is not good evidence on the point. It most often involves experts speaking outside their field, or one voice standing in for a whole discipline.
Is citing an expert always an appeal to authority fallacy?: No. Pointing to a relevant expert, or better still a consensus of experts, is a reasonable way to support a claim you cannot check yourself. It becomes fallacious when the authority is irrelevant, disputed, or used to shut down questions about the evidence.
Appeal to authority vs authority bias: what is the difference?: Authority bias is the psychological pull towards over-trusting people with status. The appeal to authority is the argument that exploits that pull, offering status as if it were proof. One is a habit of mind; the other is a move made in debate.
What is the Latin name for the appeal to authority?: It is often called argumentum ad verecundiam, loosely “the argument from modesty” or “from respect”, because it leans on a listener’s reluctance to question someone eminent. It is also known as argumentum ab auctoritate, the argument from authority.

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APA

ReadGlobe. (2026). Appeal to authority fallacy. https://readglobe.com/fallacy/appeal-to-authority/

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"Appeal to authority fallacy." ReadGlobe, 24 Oct. 2026, readglobe.com/fallacy/appeal-to-authority/.

Editorial synthesis © ReadGlobe 2026, drawing on the Internet Encyclopedia of Philosophy and the Stanford Encyclopedia of Philosophy entries on fallacies and the logic and critical-thinking literature they cite. · Last reviewed 2026-10-24.