6 paths
Reading paths
Curated routes through the site. Each one builds, step by step, so that every entry makes the next one richer.
First steps
About 2 hours · 6 entries
Never read philosophy before? Start here. Six of the most famous ideas, each short, each a doorway to a whole field.
- Plato's caveThe oldest image of philosophy itself: prisoners mistaking shadows for the world.
- The Ship of TheseusA simple puzzle about planks that turns out to be about you. Try the slider.
- The trolley problemPull the lever or not. Your answer reveals which moral theory you already hold.
- Is free will an illusion?The big question underneath the trolley: were you ever free to choose?
- Are you a brain in a vat?How do you know any of this is real?
- Does life have meaning without being given one?Where all the other questions lead in the end.
Are you free?
About 3 hours · 7 entries
From physics to neuroscience to moral blame: a route through the free will debate that builds each step on the last.
- Could a perfect mind predict everything?The picture of a clockwork universe that started the modern worry.
- Is the future already fixed?What determinism actually claims, and whether physics supports it.
- Does your brain decide before you do?The experiments said to show your brain decides before you do, and what they really show.
- Is free will an illusion?The full debate, with every position at its strongest.
- Could you be responsible without any alternatives?A clever case suggesting you can be responsible even if you could not have done otherwise.
- Can you be free in a determined universe?The most popular answer among philosophers, and why many find it unsatisfying.
- Can anyone deserve blame?What follows for praise, blame and punishment.
What is a mind?
About 4 hours · 8 entries
Can science explain consciousness? Could a machine have it? A path through the hardest problem in philosophy of mind.
- Is the mind just the brain?The original problem: how thought relates to flesh.
- What is it like to be a bat?Why the subjective point of view is so hard to capture.
- Why is there something it is like to be you?The modern statement of the puzzle.
- Mary's roomDoes knowing all the physical facts tell you what red looks like?
- Could there be a zombie you?Could there be a perfect physical copy of you with no inner life?
- The Chinese roomIs following rules the same as understanding?
- Could a machine be conscious?The question as it now stands, with real machines on the table.
- Two minds in one head?What happens to a single mind when the brain is divided.
Who are you?
About 3 hours · 7 entries
What makes you the same person as the child in your old photographs? A path from planks to teleporters to the Buddhist denial of the self.
- The Ship of TheseusIdentity over time, with no people involved yet.
- Are you the same person you were at eight?The main theories of personal identity, side by side.
- Are you your memories?Are you your memories? Locke thought so.
- Would you step into the teleporter?Would stepping into the machine be travel or death?
- Could you upload your mind?The same question, asked about a technology people are seriously pursuing.
- Is the self an illusion?The radical answer: there was never a self to lose.
- Should we fear death?If the self is less than we thought, what does death take from us?
How should I live?
About 4 hours · 8 entries
From ancient advice to modern dilemmas: the main ethical theories, tested against the cases that make them hard.
- Would you be good if no one could see?Would you be good if no one could ever find out?
- What makes an action right?The three great theories, and what each gets right.
- The trolley problemWhere the theories collide.
- The drowning childHow much do we owe strangers?
- Would you plug into the experience machine?Is pleasure all that matters?
- Should you only care about what you control?An ancient answer to living well when much is out of your hands.
- Are you born with a nature?The existentialist answer: no one can tell you, not even nature.
- Must we imagine Sisyphus happy?And if nothing has ultimate meaning, Camus asks, why go on?
When logic breaks
About 3 hours · 7 entries
Arguments that look airtight and end in absurdity. Each paradox here forced someone to rethink logic, mathematics or rational choice.
- Zeno's paradoxesThe first and most famous: motion is impossible.
- The sorites paradoxWhen does a heap stop being a heap?
- The liar paradox'This sentence is false.'
- Russell's paradoxThe contradiction that shook the foundations of mathematics.
- The unexpected hangingA surprise that logic proves cannot happen, and then happens.
- Newcomb's problemA predictor, two boxes, and a split among decision theorists.
- The St. Petersburg paradoxA game with infinite expected value that no one would pay much to play.