Fallacy Definitions
Name that Fallacy
Well, Actually...
Dude, What's That Fallacy?
Dictionary of Fallacies
100

This fallacy asserts that because one thing happened after another, the first event caused the second event.

What is the post hoc fallacy?

100

If we legalize marijuana, everyone will get addicted to it and no one will work again. 

What is a slippery slope?

100

I got the flu after getting my flu shot. I’m never getting the shot again—it causes the flu!

What is a post hoc fallacy?

100

You’re either with us, or you’re against us.

What is an either-or fallacy?

100

Look out, Dorothy! A writer commits this fallacy when they misrepresent opponents' arguments to more easily refute them.

What is a straw man? 

200

This fallacy occurs when the writer argues that there are just two choices when there are actually more. 

What is the either-or fallacy?

200

NASA has never presented any evidence that UFOs don’t exist; therefore, they must exist.

What is an appeal to ignorance?

200

I always get lower grades than my classmates. My TA must be a harder grader than the other TAs.

What is a hasty or sweeping generalization?

200

Dr. Thomson, I’m not sure why we should believe anything you say about the community health center. Last year, you left your husband for another woman.

What is an ad hominem fallacy?

200

This fallacy occurs when a conclusion does not follow from the premises.

What is a non sequitur? 

300

When a writer argues that their conclusion must be true because they haven't found evidence against it, they have committed this fallacy.

What is an appeal to ignorance?

300

You can’t fail me! If you do, I’ll lose my scholarship! You’re ruining my life!

What is an appeal to pity?

300

Our school is diverse. Therefore, we don’t need affirmative action.

What is a non sequitur?

300

If we open the borders, our country will be terrorized!

What is an appeal to fear?

300

When a writer reaches a conclusion based on too little evidence, they have committed this fallacy.

What is a hasty or sweeping generalization?

400

Apples to...hippopotamuses? A writer who relies on comparing two unrelated items or concepts risks committing this fallacy.

What is weak or false analogy?

400

Sports cars are noisy; therefore, we should ban driving sports cars after 10pm.

What is begging the question?

400

America has always been capitalist! How could we embrace this candidate’s socialist ideals?

What is an appeal to tradition?

400

People who think hunting for sport is immoral just think that animals are more important than people.



What is a straw man?

400

A writer is doing this when they assume a statement is self-evident or true when it actually requires proof.

What is begging the question?

500

Et tu, Brute? This fallacy occurs when writers attack their opponents' characters or motives instead of focusing on the issues.

What is the ad hominem fallacy?

500

Temperatures have risen in the last decade, and the number of pirates has decreased. We need to create more pirates to prevent global warming.

What is a post hoc fallacy?

500

Guns are like hammers. They’re both tools that can be used to kill someone.

What is a weak or false analogy?

500

Sure, we haven't given raises in over five years to our employees. You know, we work really hard to make a good product. We try to ensure the best customer service, too.

What is a red herring?

500

What's that smell? This fallacy occurs when a writer raises an irrelevant side issue to divert attention from the real issue.

What is a red herring?