Thought Experiments
A growing library of interactive scenarios — for kindergartners, eighth-graders, AP Philosophy students, and the educators teaching them all. Some are 2,400 years old. Some are about your classroom. None have right answers. All of them help us think.
Dialogue Toolkit
Norms, sentence stems, twelve protocols, five Socratic moves, a 'what do I do when…' decision tree, and a parallel global canon.
Decision Journal
A private, browser-only record of your reasoning across thought experiments. Notes, paths, and a Markdown export. Nothing leaves your device.
A thought experiment is a device of the imagination used to investigate the nature of things. When real experiments would be impossible, dangerous, or impractical — when the question is about consciousness, identity, justice, or a future we haven't lived yet — philosophers and scientists set up an imagined scenario to isolate one variable and test our intuitions against it. The Stanford Encyclopedia of Philosophy describes them as the most powerful intuition pumps we have.
Galileo dropped two cannonballs of different weights — but only in his head — and reasoned that Aristotle had been wrong about gravity for two thousand years. Einstein imagined himself riding alongside a beam of light, and out fell special relativity. Plato imagined prisoners watching shadows in a cave, and educators have wrestled with what real understanding means ever since. The thought experiment is older than the laboratory. It works because thinking, done carefully, is itself a way of finding things out.
We are running a real-time experiment with artificial intelligence in our classrooms, our courts, our news feeds, and our friendships. We have no precedent. We have no track record. We have many very confident vendors. What we do have is 2,400 years of careful imagined scenarios that already framed most of the questions: What makes a mind? What do we owe each other? When is a choice authentic? Who counts? Whose work is this?
The Trolley Problem is now being programmed into self-driving cars. Plato's Ring of Gyges is the design brief for every anonymous account. Mary's Room is what happens when a student arrives at fluency without ever having struggled. Thought experiments give a teacher and a fourteen-year-old a shared language for things neither of them has lived through yet.
Three experiments to start with — one for younger students, one for middle school, one for the philosophical canon.
The four flagship interactive experiments under For Educators are original scenarios. But they draw on a rich tradition of thought experiments — each illuminating a different dimension of the same question: can the process of learning be separated from its value?
Continue Exploring
For Educators
Flagship dilemmas for adults
K–5
Read-aloud, illustrated
6–8
Story-based AI ethics
9–12
The philosophical canon
Dialogue Toolkit
Norms, protocols, global canon








