Logical Fallacies

LogFall

A practical logical-fallacies reference with clear explanations, usable examples, and teaching tools.

Fallacy profile

Special pleading

Occurs when someone asks for an exception to a rule or standard but does not provide a relevant reason for why the favored case should be exempt.

EvidentialConceptual

Definition

Occurs when someone asks for an exception to a rule or standard but does not provide a relevant reason for why the favored case should be exempt.

Illustrative example

Data privacy matters for everyone else's app, but our app is different because our mission is important.

Teaching gauges

These 0-100 gauges are teaching aids for comparing fallacies. They are editorial classroom estimates, not measured statistics.

Very common

70

Common in today's rhetoric

Appears regularly in everyday public rhetoric.

Moderate

55

Easy to spot

Recognizable, but easy to miss in a fast or heated exchange.

Almost automatic

85

Easy to innocently commit

Very easy for well-meaning people to commit without noticing.

Foundational

25

Difficulty

Usually approachable without much prior logic background.

Middle school+Scientific reasoning

Reference

Family

Evidential/Methodological Fallacy

The mistake lies in how evidence is gathered, weighed, interpreted, or treated as sufficient.

Quick check

What evidence is missing, selected, or overstretched here?

Why it misleads

A fuller explanation of how the fallacy works and why it can look persuasive.

Exceptions can be justified, but they need a principled reason. Mere attachment to the favored case is not enough.

That's like saying...

Instead of leading with the label, this analogy answers the shape of the reasoning move directly so the mistake is easier to see in plain language.

Fallacious claim

Data privacy matters for everyone else's app, but our app is different because our mission is important.

That's like saying...

That's like insisting every runner must stay behind the starting line except your cousin, because his dream matters more. An exception is being requested without a relevant reason.

Caveat

This label is easy to overuse. The point here is not to call every weak argument by this name, but to reserve it for the exact misstep it describes.

Common misapplication

Do not use this label simply because the evidence is incomplete. It applies when the argument claims more support than the evidence has actually earned. Exceptions can be justified, but they need a principled reason.

Use the label only when...

Use this label only when someone asks for an exception to a rule or standard but does not provide a relevant reason for why the favored case should be exempt. If the real problem is that a view is framed so every possible outcome fits it equally well, leaving no meaningful room for the claim to fail, the better label is Impotent logical space.

Often confused with

These near neighbors are easy to mix up, so use the comparison to see the exact difference.

Comparison

Impotent logical space

Why people mix them up: Both often look like evidential and conceptual mistakes at first glance.

Exact difference: Special pleading happens when someone asks for an exception to a rule or standard but does not provide a relevant reason for why the favored case should be exempt. Impotent logical space happens when a view is framed so every possible outcome fits it equally well, leaving no meaningful room for the claim to fail.

Quick split: What evidence is missing, selected, or overstretched here? Then compare it with What evidence is missing, selected, or overstretched here?

Comparison

Witness chain

Why people mix them up: Both often look like evidential and conceptual mistakes at first glance.

Exact difference: Special pleading happens when someone asks for an exception to a rule or standard but does not provide a relevant reason for why the favored case should be exempt. Witness chain happens when testimony is padded by unverifiable references to other alleged witnesses, creating the illusion of corroboration without actually providing independent support.

Quick split: What evidence is missing, selected, or overstretched here? Then compare it with What evidence is missing, selected, or overstretched here?

Practice And Repair

Extra teaching tools that show why the fallacy is persuasive, what to look for, and how to correct it.

Why it matters

Why this mistake matters

Special pleading threatens rationality because someone asks for an exception to a rule or standard but does not provide a relevant reason for why the favored case should be exempt.

Main reasoning problem

Someone asks for an exception to a rule or standard but does not provide a relevant reason for why the favored case should be exempt.

Why this kind of mistake matters

It overstates, understates, cherry-picks, or misallocates the force of evidence.

Check yourself

The assessment area now uses mixed 10-question sets, so the fallacy is not announced in the title before the quiz begins.

What the assessment does

You will work through a mixed set of fallacy-identification questions. Focused links from a fallacy page will quietly include this fallacy among nearby look-alikes without announcing the answer in the page title.

Questions to ask

Use these category-based prompts to audit similar arguments.

Prompt 1

What evidence is missing, selected, or overstretched here?

Prompt 2

Are the categories being used carefully, or are unlike things being treated as alike?

Case studies

Each case study explains why the example fits the fallacy and links back to its source whenever source information is available.

Raw milk from a California dairy is recalled after routine testing detected the bird flu virus

AP's November 25, 2024 report on raw milk recalled after bird-flu detection is a good case for arguments that romanticize the 'natural' while minimizing risk. It makes the tradeoff concrete: appeals to purity and tradition can feel reassuring even when the biological evidence points the other way. The fallacy here is Special pleading: someone asks for an exception to a rule or standard but does not provide a relevant reason for why the favored case should be exempt. That matters here because exceptions can be justified, but they need a principled reason. A better analysis would remember that mere attachment to the favored case is not enough.

Associated Press · 2024-11-25

How an unsubstantiated, anonymous affidavit about the ABC presidential debate was amplified online

PolitiFact's September 20, 2024 reconstruction of the fake ABC whistleblower affidavit is especially valuable because it shows how public figures shared the claim while conceding they did not know whether it was true. That is a live, well-documented case of conjecture and amplification outrunning authentication. The fallacy here is Special pleading: someone asks for an exception to a rule or standard but does not provide a relevant reason for why the favored case should be exempt. That matters here because exceptions can be justified, but they need a principled reason. A better analysis would remember that mere attachment to the favored case is not enough.

PolitiFact · 2024-09-20

Political actors often demand strict accountability, civility, or transparency for opponents while inventing excuses for why their own side should be judged differently. The fallacy here is Special pleading: someone asks for an exception to a rule or standard but does not provide a relevant reason for why the favored case should be exempt. That matters here because exceptions can be justified, but they need a principled reason. A better analysis would remember that mere attachment to the favored case is not enough.

Religious and ideological arguments often exempt cherished claims from the evidence standards applied to ordinary claims. The fallacy here is Special pleading: someone asks for an exception to a rule or standard but does not provide a relevant reason for why the favored case should be exempt. That matters here because exceptions can be justified, but they need a principled reason. A better analysis would remember that mere attachment to the favored case is not enough.

Related fallacies

Nearby entries chosen by shared categories and family resemblance.