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Relevance FallaciesAKA: Argumentum ad verecundiam

The Appeal to Authority (Argument from Authority) Fallacy

Treats a claim as true solely because an authority or expert said so.

Quick summary
  • Definition: Treats a claim as true solely because an authority or expert said so.
  • Impact: Appeal to Authority (Argument from Authority) distorts reasoning by Expert opinion without supporting evidence or proper domain expertise does not establish truth. Even real experts can disagree or be biased.
  • Identify: Look for patterns like Cite an authority who states claim X.

What is the Appeal to Authority (Argument from Authority) fallacy?

Appeals to authority can be informative, but become fallacious when the authority’s credibility, domain, or consensus is absent. The argument substitutes an expert’s word for evidence.

People lean on this pattern because Borrowing credibility is fast, feels authoritative, and can bypass the need to supply data.

The Pattern
  • 1Cite an authority who states claim X.
  • 2Provide little or no relevant evidence.
  • 3Treat the authority’s word as sufficient proof that X is true.

Why the Appeal to Authority (Argument from Authority) fallacy matters

This fallacy distorts reasoning by Expert opinion without supporting evidence or proper domain expertise does not establish truth. Even real experts can disagree or be biased.. It often shows up in contexts like Marketing, Media, Workplace decisions, where quick takes and ambiguity can hide weak arguments.

Examples of Appeal to Authority (Argument from Authority) in Everyday Life

Everyday Scenario
"Choosing a diet."
A:This influencer says this supplement fixes everything.
B:Which studies back it? Fame isn’t evidence.
Serious Context

A corporation cites a paid consultant’s opinion as proof of safety, despite lack of peer-reviewed research or regulatory consensus.

Why it is fallacious

Expert opinion without supporting evidence or proper domain expertise does not establish truth. Even real experts can disagree or be biased.

Why people use it

Borrowing credibility is fast, feels authoritative, and can bypass the need to supply data.

How to Counter It

Recognition

  • Source is cited instead of evidence.
  • Expert is outside their domain or lacks consensus support.
  • No attempt is made to engage with data or counter-evidence.

Response

  • Ask for evidence and domain-relevant credentials.
  • Check whether there is consensus or significant dispute.
  • Separate opinion from data and request primary sources.
Common phrases that signal this fallacy
  • “Appeal to Authority (Argument from Authority)” style claim: Treats a claim as true solely because an authority or expert said so.
  • Watch for phrasing that skips evidence, e.g. "Treats a claim as true solely because an authority or expert said so"
  • Pattern hint: Cite an authority who states claim X.
Better reasoning / Repair the argument

Ask for evidence and domain-relevant credentials.

Often confused with

Appeal to Authority (Argument from Authority) is often mistaken for Appeal to Popularity, but the patterns differ. Compare the steps above to see why this fallacy misleads in its own way.

Variants

Close variations that are easy to confuse with Appeal to Authority (Argument from Authority).

Frequently Asked Questions

Is Appeal to Authority (Argument from Authority) always invalid?

Appeal to Authority (Argument from Authority) signals a weak reasoning pattern. Even if the conclusion is true, the path to it is unreliable and should be rebuilt with sound support.

How does Appeal to Authority (Argument from Authority) differ from Appeal to Popularity?

Appeal to Authority (Argument from Authority) follows the pattern listed here, while Appeal to Popularity fails in a different way. Looking at the pattern helps choose the right diagnosis.

Where does Appeal to Authority (Argument from Authority) commonly appear?

You will find it in everyday debates, opinion columns, marketing claims, and quick social posts—anywhere speed or emotion encourages shortcuts.

Can Appeal to Authority (Argument from Authority) ever be reasonable?

It can feel persuasive, but it remains logically weak. A careful version should replace the fallacious step with evidence or valid structure.

Further reading