Logical Fallacies Assessment

The Logical Fallacies Assessment is a reasoning exercise that checks how easily you spot common errors in arguments, including formal fallacies, informal fallacies and quantifier mistakes. It is educational and has no clinical meaning. 27 items; about 10 minutes.

Evaluate each scenario and identify the reasoning pattern.

Your Name Client Code (provided by your therapist)

Question 1 of 27

If someone has AIDS, they might have health problems. John has health problems. Therefore, John has AIDS.

Affirming the Consequent Denying the Antecedent Modus Ponens Hasty Generalization

Question 2 of 27

If a person is a ski instructor, then they have a job. John is not a ski instructor. Therefore, John does not have a job.

Affirming the Consequent Denying the Antecedent Modus Tollens False Dilemma

Question 3 of 27

All lions are animals. All cats are animals. Therefore, all lions are cats.

Undistributed Middle Hasty Generalization False Analogy Composition

Question 4 of 27

We shouldn't read this book by Freud because everyone knows he used cocaine.

Ad Hominem Genetic Fallacy Red Herring Appeal to Authority

Question 5 of 27

My opponent says we should have stricter environmental regulations. But destroying all businesses is not the answer!

Straw Man Red Herring False Dilemma Slippery Slope

Question 6 of 27

Why are we talking about education funding when our military needs more support?

Red Herring Tu Quoque Appeal to Emotion False Dilemma

Question 7 of 27

This diet must be healthy because a famous actor endorses it.

Appeal to Authority Bandwagon Appeal to Emotion Hasty Generalization

Question 8 of 27

You shouldn't be fined for speeding because you feel terrible about it.

Appeal to Emotion Appeal to Pity Tu Quoque Begging the Question

Question 9 of 27

There's no proof that this supplement is harmful, so it must be safe.

Appeal to Ignorance Hasty Generalization False Dilemma Post Hoc

Question 10 of 27

Twilight must be a great book because everybody seems to have read it.

Bandwagon Fallacy Appeal to Authority Hasty Generalization Genetic Fallacy

Question 11 of 27

Father: You should stop smoking. Son: Why should I listen to you? You started smoking when you were 15!

Tu Quoque Ad Hominem Red Herring Genetic Fallacy

Question 12 of 27

After one computer programmer failed to fix the network, I concluded that programmers usually don't know what they're doing.

Hasty Generalization Anecdotal Fallacy Post Hoc Composition

Question 13 of 27

Vaccines are dangerous because I heard a story about someone who had a bad reaction.

Anecdotal Fallacy Hasty Generalization Appeal to Emotion Genetic Fallacy

Question 14 of 27

I wore my lucky socks to the game and we won. Therefore, my socks caused our team to win.

Post Hoc Hasty Generalization False Cause Superstition

Question 15 of 27

If we allow students to redo assignments, next they'll want to retake every test. Eventually, the whole grading system will collapse.

Slippery Slope False Dilemma Hasty Generalization Red Herring

Question 16 of 27

A person collected data and found a small cluster that supported their theory, while ignoring contradictory data.

Texas Sharpshooter Confirmation Bias Cherry Picking Hasty Generalization

Question 17 of 27

You're either with us in supporting this war, or you're against our troops.

False Dilemma Straw Man Appeal to Emotion Red Herring

Question 18 of 27

People have free will because they can choose what to do.

Begging the Question Circular Reasoning Tautology Non Sequitur

Question 19 of 27

Have you stopped cheating on your taxes?

Loaded Question Complex Question False Dilemma Ad Hominem

Question 20 of 27

Person A: No Scotsman puts sugar in his porridge. Person B: My friend Duncan does. Person A: Well, no TRUE Scotsman would.

No True Scotsman Moving the Goalposts Ad Hoc Reasoning Genetic Fallacy

Question 21 of 27

Recent studies claimed black cumin seed has therapeutic potential, but that's absurd because of where the research came from.

Genetic Fallacy Ad Hominem Appeal to Authority Hasty Generalization

Question 22 of 27

Bob says the sky is yellow. Sally says it's blue. So the truth must be that the sky is green.

Middle Ground Fallacy False Compromise Golden Mean False Dilemma

Question 23 of 27

A feather is light. Light travels fast. Therefore, a feather travels fast.

Equivocation Ambiguity Semantic Fallacy Composition

Question 24 of 27

Each part of this machine is lightweight. Therefore, the entire machine is lightweight.

Composition Division Hasty Generalization False Analogy

Question 25 of 27

This team is successful, so every individual player must be successful.

Division Composition Hasty Generalization False Analogy

Question 26 of 27

This treatment is superior because it's completely natural and organic.

Appeal to Nature Naturalistic Fallacy False Authority Bandwagon

Question 27 of 27

Everyone has a moral value system. Therefore, there is a moral value system that everyone has.

Quantifier-Shift Existential Fallacy Equivocation Composition

Your responses are confidential.

Empathos

Logical Fallacies Assessment

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