Philosophy Experiments

Interactive thought experiments designed to challenge your moral intuitions and explore the boundaries of human reasoning.

Explore All Experiments Start with the Trolley Problem

Featured Experiments

Some of our most popular philosophical challenges

Should You Kill the Fat Man?

The classic trolley problem. A runaway trolley threatens five people. Would you push someone to their death to save the five?

~5 min Take the Test
Would You Eat Your Cat?

Explore the "yuk factor" in moral reasoning. When does disgust become a legitimate basis for moral judgement?

~5 min Take the Test
Talking with God

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

~5 min Take the Test
What Does Mary Do?

A deceptively simple logic test based on Tversky and Kahneman's conjunction fallacy. Can you avoid the trap most people fall into?

~2 min Take the Test
Staying Alive

What makes you the same person over time? Explore puzzles about personal identity and the self.

~10 min Take the Test
Philosophical Health Test

Test the consistency of your beliefs. Do your philosophical views hang together, or are there hidden tensions?

~10 min Take the Test

What Are Philosophy Experiments?

Philosophy experiments are interactive thought experiments designed to reveal your intuitions about ethics, knowledge, identity, and more. By working through carefully constructed scenarios, you'll discover what you really believe - and whether those beliefs are consistent.

Each experiment presents you with dilemmas and questions, then analyses your responses to show how they compare with others and whether there are any tensions in your thinking. There are no right or wrong answers - only the opportunity to think more deeply about the big questions.

Explore by Category

Ethics & Morality

Classic moral dilemmas that test your ethical intuitions.

Mind & Identity

Puzzles about consciousness, knowledge, and personal identity.

Logic & Reasoning

Test your reasoning with probability puzzles and logic games.

View All 24 Experiments