Critical Thinking Test: Can You Spot The Flaw?

Twelve everyday scenarios from adverts, headlines and arguments test whether you can spot fallacies, weigh evidence and avoid common thinking traps.

  • 12 questions
  • About 6 min
  • Free, no sign-up
  • Based on logical fallacies and evidence evaluation

12 questions, about 6 min

Twelve everyday scenarios drawn from 22: adverts, headlines, arguments and statistics. Spot the flaw, weigh the evidence and pick the strongest conclusion.

There is no timer. After each answer you see why the best answer is best. Your score and the questions you missed appear at the end.

What This Test Measures

Critical thinking is the habit of evaluating claims before accepting them. This test focuses on the situations where it matters most in everyday life:

SkillWhat you doExample scenario
Spotting fallaciesRecognise flawed arguments“Everyone uses it, so it must be best”
Weighing evidenceJudge which evidence is strongestTrial versus testimonials
Reading statisticsSee past dramatic numbersA 50% rise from 2 to 3
CausationSeparate correlation from causeLighters and lung cancer
Detecting biasNotice biases in yourself and in sourcesConfirmation bias, biased samples

How It Works And How It Is Scored

Each game gives you 12 scenarios chosen at random from a pool of 22. Choose the best answer and you will see an explanation that names the reasoning trap. At the end you get your score and the scenarios you missed.

ScoreRating
0% to 40%Getting started
41% to 65%Aware thinker
66% to 85%Sharp critical thinker
86% to 100%Expert critical thinker

All scenarios were written by PrismaTest.

The Most Common Reasoning Traps

TrapWhat it doesQuick defence
Bandwagon“Lots of people do it, so it is right”Popularity is not proof
Ad hominemAttacks the person, not the argumentJudge the argument itself
Straw manDistorts a view to attack itRestate the original fairly
False dilemmaOffers only two optionsLook for the third way
Slippery slopeAssumes a chain of extreme outcomesAsk for evidence at each step
Correlation as causationTreats a link as a causeLook for a third factor
Appeal to nature“Natural means safe”Many natural things are harmful
Gambler’s fallacyExpects chance to “even out”Independent events have no memory
Confirmation biasSeeks only agreeing evidenceLook for the best counterargument

Why Critical Thinking Matters

Research by educational psychologists such as Diane Halpern suggests critical thinking skills can be taught and that they predict better real-world decisions, from money to health. Studies of misinformation also show that teaching people to recognise manipulation techniques, sometimes called “prebunking”, makes them better at spotting false claims online.

Frequently Asked Questions

Is this a standardised critical thinking test?

No. It is a practice tool written for everyday reasoning. Formal assessments such as the Watson-Glaser test are used in some recruitment processes.

How can I improve my critical thinking?

Learn the common fallacies, ask where numbers come from, consider alternative explanations and seek out views that challenge your own.

Are the questions random?

Yes. Each game picks 12 scenarios from a pool of 22.

Related Tests

For pure puzzles, try the logic test. For a view of how you think more broadly, try the multiple intelligences test.

A practice tool, not a standardised assessment. See how we build our tests.