25 interactive philosophy experiments

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Think Again app poster showing 10 interactive philosophy experiments, 50 insight cards, and 133,000 plus responses.

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10 interactive philosophy experiments and 50 insight cards built from 133,000 plus responses.

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Some experiments are short logic traps. Others are slower moral, identity, or worldview tests. Start with the style of thinking you want, not just the title that happens to catch your eye.

25

Experiments

Classic dilemmas, logic tests, identity puzzles, and worldview checks.

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Jump to:Ethics & MoralityMind & IdentityLogic & ReasoningReligion & Philosophy

10 experiments

Ethics & Morality

Classic moral dilemmas, social taboos, sacrifice cases, and applied questions about harm, consent, and obligation.

Classic dilemmaTrolley problemUtilitarianism

Should You Kill the Fat Man?

The classic trolley problem. Would you push someone to their death to save five others?

Best for starting with the site’s most famous moral problem.

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Doctrine testDouble effectTrolley variant

Should You Kill the Backpacker?

A variant of the trolley problem that tests the limits of the doctrine of double effect.

Best for seeing how intention and side-effects pull against each other.

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CounterexampleHarmIntention

The Envelope & the Vintage Sedan

Another trolley variant exploring the ethics of harm and intention.

Best for checking whether your trolley intuitions survive a new setup.

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Applied ethicsSingerObligation

Peter Singer and the Drowning Child

Based on Peter Singer's arguments about our obligations to help those in need.

Best for obligation, charity, and distance from harm.

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Scenario setKilling vs letting dieThomson

A Murder Puzzle

Judith Jarvis Thomson's scenarios about killing, letting die, and moral responsibility.

Best for finer-grained distinctions than the trolley cases alone.

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Survival caseSacrificeExtreme cases

In the Face of Death

Explore moral dilemmas about survival and sacrifice in extreme circumstances.

Best for pressure-testing morality under severe conditions.

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Deep diveMany scenariosMoral thresholds

Morality Play

19 moral scenarios to explore your ethical framework and where you draw the line.

Best for a broader sweep across many different moral intuitions.

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Taboo testDisgustMoral taboo

Would You Eat Your Cat?

The 'yuk factor' in moral reasoning. When does disgust become a basis for moral judgement?

Best for taboo, disgust, and where instinct starts to feel moral.

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Autonomy caseAbortionBodily autonomy

Whose Body Is It Anyway?

Judith Jarvis Thomson's thought experiments on bodily autonomy and the morality of abortion.

Best for bodily autonomy and abortion reasoning.

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3 experiments

Mind & Identity

Puzzles about the self, consciousness, personal persistence, and whether you remain the same person across strange cases.

Identity puzzleSelfBody swap

You're Being Tortured in the Morning

What makes you who you are? Explore puzzles about personal identity and the self.

Best for dramatic body-swap style cases about who counts as you.

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Parfit classicParfitContinuity

Staying Alive

What makes you the same person over time? Derek Parfit's puzzles about personal identity.

Best for a fuller route through personal continuity and survival.

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Free will caseFrankfurtFree will

Get That Chip Out Of My Brain

Harry Frankfurt's cases about moral responsibility and whether free will requires alternatives.

Best for responsibility, coercion, and alternate possibilities.

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8 experiments

Logic & Reasoning

Probability traps, paradoxes, deduction tests, and cases that expose the difference between what feels right and what follows logically.

Deduction testLogicSelection task

The Wason Test

A famous test of logical reasoning. Only 10% of people get it right - will you?

Best for conditional reasoning and rule-checking.

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Short trapProbabilityConjunction fallacy

What Does Mary Do?

Tversky and Kahneman's conjunction fallacy. A deceptively simple logic test that most people get wrong.

Best for a very fast start and a strong immediate payoff.

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Decision puzzleAmbiguityDecision theory

Ellsberg's Ambiguity Test

A paradox about probability and ambiguity aversion in decision-making.

Best for risk, ambiguity, and why uncertainty changes preference.

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Game puzzleGame showProbability

The Monty Hall Problem

The famous game show puzzle that confounds intuitions about probability.

Best for probability intuition versus mathematical structure.

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Prediction caseNewcombPrediction

A Million Dollar Puzzle

A paradox of decision theory involving a near-omniscient predictor.

Best for one-boxing, two-boxing, and decision-theory conflict.

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Bias testFramingCognitive bias

Framing the Epidemic

How the way choices are presented affects our decisions - even when the options are identical.

Best for seeing how wording changes judgement without changing outcomes.

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Stats paradoxStatisticsParadox

Simpson's Paradox - a Test

A statistical paradox where trends appear in groups but disappear or reverse when combined.

Best for aggregate data, subgroup effects, and misleading summaries.

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Argument testSyllogismsValidity

Valid or Invalid?

Test your skills at identifying valid and invalid logical arguments.

Best for formal validity rather than probability or intuition.

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4 experiments

Religion & Philosophy

Experiments about God, moral authority, religious belief, and whether your wider worldview holds together under pressure.

Worldview testBelief consistencyReligion

Battleground God

Can your beliefs about religion make it across our intellectual battleground? Test your rational consistency.

Best for pressure-testing a wider set of religious beliefs together.

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Classic dilemmaEuthyphroDivine command

Talking with God

The Euthyphro Dilemma: Is something good because God commands it, or does God command it because it's good?

Best for a sharp single question about God and morality.

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Consistency auditConsistencyBelief map

Philosophical Health Test

Test the internal consistency of your beliefs. Are there hidden tensions in your worldview?

Best for a broader check on how your beliefs fit together.

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Worldview auditMotivated reasoningPolitical bias

Whose Side Are You On?

Do your political commitments shape your reasoning? 14 hypothetical scenarios reveal whether you hold your own side to the same standard you hold your opponents.

Best for testing whether your reasoning shifts when your own side is under pressure.

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