What is the relation between matter and mind?
A molecule erases a morning. A gray room holds every fact but red. A simulation argument bets on copies.
Science
A person counts backward, the room continues, and later there is a hole in the life where the cutting was.
When the Lights Go Out
Operating theaters everywhere · 1846 to now
Philosophy
The Door with a Seam of Color
A scientist who knows everything about color has never seen it. Then the door opens.
A gray room that does not exist · 1982
AI & Machines
One Thread Among Many
A public figure bets that this is probably not base reality. The bet is not a proof. It is a contemporary form of an old unease.
A stage in California, then the feed · 2016, among other dates
Ancient World
Men chained in a cave take shadows for the world.
The Fire and the Wall
Athens · c. 375 BCE
Sacred Traditions
When Knowledge Would Not Sit Still
The most celebrated teacher in Baghdad can no longer trust that he knows, and walks away from the lectern.
Baghdad, then Damascus and Tus · 1095
Science
Seeing Without Seeing
A man says he is blind in part of the field, and still posts letters through a slot he claims not to see.
Britain, then many labs · 1974 onward
Animals
An animal without a backbone unscrews a jar from the inside, and the old maps of mind look provincial.
A Mind with Eight Arms
Oceans, and a few laboratories · 2010s, with older roots
Philosophy
What It Is Like
A philosopher chooses a bat, not as a mascot, but as a limit: a mind we can study and still not occupy.
Princeton, on the page of *The Philosophical Review* · 1974
Animals
The Tick’s World
A Baltic-German biologist asks you to leave the human living-room and enter the few signs that make a tick’s entire universe.
On the page, from Hamburg and the Baltic · 1934
Philosophy
A man sits through a winter of doubt, and finds a remainder he cannot unsay: that thinking is going on.
Beside the Stove
A stove-heated room in Germany, later on the page from the Netherlands · 1619 / 1641
Philosophy
The Floating Man
A physician-philosopher asks you to imagine a person created at once in mid-air, with no senses, and still knowing that they are.
On the page, from Bukhara to Hamadan to Isfahan · c. 1027
Science
The Line That Would Not Join
A histologist in Barcelona draws what the silver stain shows: endings. The rival theory wanted a net.
Barcelona, then Madrid · 1888
Philosophy
A monk answers the charge that if there are only presentations, nothing could bump into anything else.
Twenty Verses, Not a Simulation
Gandhāra, as later tradition seats him · 4th–5th century CE
Science
A Map Drawn on a Waking Man
In Montreal an awake patient names what a current in the cortex is doing to a hand, a sound, a memory.
Montreal Neurological Institute · 1930s–1958
Science
The Conviction of Its Existence
A Civil War physician finds that men who have lost an arm still itch in a hand that is not there. He has to invent a word, and then a fiction, to be believed.
Turner’s Lane Hospital, Philadelphia · 1864–1872
Science
A clock, a flex of the wrist, a scalp potential that seems to rise before the reported wish to move. The finding is famous. It is also contested.
The Half-Second Before
University of California, San Francisco · 1983
Science
The Work of Rest
A brain at rest, eyes closed, is not a blank. A network that quiets when a task begins is named a default.
Washington University, St. Louis · 2001
Science
A Loop That Is Lived
A Chilean biologist, with a philosopher and a psychologist, argues that mind is not a picture in a head. It is an enactment in a body that is already a world.
Santiago, Paris, and the page of *The Embodied Mind* · 1991