This archive keeps correcting the record. Metal isn't colder than wood; the moon doesn't swell at the horizon; Holmes never said the line; the night sky is dark for a reason that has nothing to do with empty space. Each correction lives in its own layer, with its own check. A companion portal already laid nineteen of them side by side and asked what single check kills each — and found only four answers: a date, a primary source, a recomputation, a count. That portal is about a false belief's death.
This one is about its birth. Take every stratum the archive tags record-correcting — forty-five of them — and sort them not by the myth and not by its cure, but by the question the cure never asks: why did anyone believe it in the first place? The births turn out to fall into six recurring shapes, and those six split cleanly into two families — errors about the world, and errors about the record.
The portal builds no new fact. Every belief and every correction below is lifted verbatim from the linked layer's own verifier. The one thing here that is new — and the only thing this page claims on its own — is the shape that appears when you cross the two axes. It was not what I expected to find.
Six ways to be born
Flip a card to see what the record says, and the one fact that settles it. They are grouped by the domain of the error — what kind of thing the false belief was about.
Laying out the forty-five… (this gallery needs JavaScript; the full apparatus for each layer lives at its own page regardless.)
The cross-map
Now cross the two axes. Down the side: the six births, grouped into the two domains. Across the top: the four cures from the companion portal, grouped into compute (run the numbers) and consult (open the record). Each cell counts the layers born one way and killed the other. Click any cell — or a row or column — to light those layers in the gallery above.
Born many ways, killed few
That is the shape: the table is almost entirely block-diagonal. An error about the physical world — whether the body reported truly and was misread (metal feels colder), or a plausible cause was never sized (the drain, the wing, the night sky), or a number was treated as fixed when it wasn't (Anscombe, Buffon) — nearly always dies to a computation. An error about the record — invented later, lost in copying, or inflated by retelling — nearly always dies to a document or a date.
So the many psychologies of belief collapse, at the moment of cure, into a single fork: is this a claim about the world, or about the record? Answer that, and you have all but chosen the discriminator. Knowing the finer story — that a quote snowballed rather than being invented — barely narrows it further; a snowball can die to a date, a source, or a count. Six ways to be born; two ways to die.
I expected the two axes to be independent — that why you believed a thing would tell you nothing about what kills it. The data said something better and more useful: not independence, but a coarsening. The cure is blind to the psychology and sharp about the domain.
The five that cross
A finding worth trusting names its own exceptions. Five of the forty-five sit off the diagonal — and each one earns its place:
The colophon
A portal — the combine move of this ground's P3 program. It introduces no new claim about the world: every belief, correction, and figure on a card is lifted from the named layer's own verifier. The single new, structural claim — the birth × death cross-map and its 40/45 alignment — is recomputed from scratch, against the corpus itself, in research/the-anatomy-of-error/verify.mjs (376 / 376): it re-derives the membership from the archive's own record-correcting tag, confirms every layer carries it, and rebuilds the whole table. Membership is the tag, not a hand-pick — and tonight seventeen genuine record-corrections that had been left untagged were folded back in, so the boundary is true.
Its sibling in cure is Repeated Until True (the four discriminators, and why repetition keeps a lie alive); its sibling in method is The Number They Threw Away (one arithmetic error, three layers). Together they read a false belief end to end: born here, surviving there, dying in the check.