All Experiments
24 interactive philosophy experiments to challenge your thinking
Ethics & Morality
Classic moral dilemmas that test your ethical intuitions
Should You Kill the Fat Man?
The classic trolley problem. Would you push someone to their death to save five others?
Should You Kill the Backpacker?
A variant of the trolley problem that tests the limits of the doctrine of double effect.
The Envelope & the Vintage Sedan
Another trolley variant exploring the ethics of harm and intention.
Peter Singer and the Drowning Child
Based on Peter Singer's arguments about our obligations to help those in need.
A Murder Puzzle
Judith Jarvis Thomson's scenarios about killing, letting die, and moral responsibility.
In the Face of Death
Explore moral dilemmas about survival and sacrifice in extreme circumstances.
Morality Play
19 moral scenarios to explore your ethical framework and where you draw the line.
Would You Eat Your Cat?
The "yuk factor" in moral reasoning. When does disgust become a basis for moral judgement?
But You'll Regret It In The Morning
Explore the boundaries and complexities of consent in various scenarios.
Whose Body Is It Anyway?
Judith Jarvis Thomson's thought experiments on bodily autonomy and the morality of abortion.
Mind & Identity
Puzzles about consciousness, knowledge, and personal identity
You're Being Tortured in the Morning
What makes you who you are? Explore puzzles about personal identity and the self.
Staying Alive
What makes you the same person over time? Derek Parfit's puzzles about personal identity.
Get That Chip Out Of My Brain
Harry Frankfurt's cases about moral responsibility and whether free will requires alternatives.
Logic & Reasoning
Test your reasoning with probability puzzles and cognitive challenges
The Wason Test
A famous test of logical reasoning. Only 10% of people get it right - will you?
What Does Mary Do?
Tversky and Kahneman's conjunction fallacy. A deceptively simple logic test that most people get wrong.
Ellsberg's Ambiguity Test
A paradox about probability and ambiguity aversion in decision-making.
The Monty Hall Problem
The famous game show puzzle that confounds intuitions about probability.
A Million Dollar Puzzle
A paradox of decision theory involving a near-omniscient predictor.
Framing the Epidemic
How the way choices are presented affects our decisions - even when the options are identical.
Simpson's Paradox - a Test
A statistical paradox where trends appear in groups but disappear or reverse when combined.
Valid or Invalid?
Test your skills at identifying valid and invalid logical arguments.
Religion & Philosophy
Explore classic questions about God, belief, and the consistency of your worldview
Battleground God
Can your beliefs about religion make it across our intellectual battleground? Test your rational consistency.
Talking with God
The Euthyphro Dilemma: Is something good because God commands it, or does God command it because it's good?
Philosophical Health Test
Test the internal consistency of your beliefs. Are there hidden tensions in your worldview?
Quick Start
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