One Thousand and One Conjectures

A scribe copying from an exemplar in front of him makes errors of the eye — confusing letters that look alike — whereas a scribe taking down a text read aloud, as in dictation or the pecia system of mass university production,…

Stemmatics — reconstructing the family tree of manuscripts from shared copying errors — is here fused with computational astronomy. A dated horoscope is a calculation: the astrologer looked up planetary positions in one specific physical copy of a set of astronomical tables…

The Tabula Peutingeriana, the famous medieval copy of a Roman route map, was almost certainly compiled from multiple earlier itineraries rather than drawn from any single survey. Each source itinerary would carry its own error habits — its own units, rounding conventions,…

Roman dice are notoriously irregular — surviving cubes are often visibly asymmetric, with face dimensions and pip placement far from the modern standard — and the crookedness has usually been waved off as indifference to fairness. Asymmetry, though, is measurable: 3D scanning…

Packet-switched content distribution splits a file into chunks that travel independently and reassemble at the destination; the medieval university book trade did the same with texts. Under the pecia system, stationers chunked an exemplar into pieces rented out separately, so a single…

in the Syriac schools, logic was not a discipline but a fixed propaedeutic block welded to theological training, so it was copied as a single curricular object for over a millennium. Porphyry's Eisagoge, the Categories, and De interpretatione should move together; the…

Insular interlace obeys strict under-over alternation, and its rare violations are treated as random lapses. The conjecture: the slips are structural — they concentrate where the drawing process broke off, at panel joins, pigment-field boundaries, and day-work seams — so error positions…

The great Eastern frame-tale collections — Kalila and Dimna, the Seven Sages, Barlaam and Josaphat — reached Europe through chains of translation: Arabic to Hebrew or Greek, then to Latin, then to the vernaculars. This conjecture claims each border crossing planed off…

Textual critics reconstruct manuscript families from shared errors; this conjecture applies the same logic to citation, claiming that scholastic misattributions are not noise but the fingerprint of the retrieval channel. A quotation inherits the false ascription its carrying florilegium or glossed book…

Everyone knows the print run as Gutenberg's invention; fewer know that in the late twelfth century the Khmer king Jayavarman VII had a nearly identical Sanskrit edict engraved on stelae at hospital foundations scattered across his empire — the same text, many…

Manuscript scholars diagnose visual copying by the saut du même au même: the copyist's eye jumps from one occurrence of a word to its next occurrence, silently deleting the span between. Khmer temple inscriptions carry enormous repetitive lists — servants' names, rice…

Between roughly the fourth and seventh centuries, Indic writing appears across a vast arc from Borneo to the mainland in scripts of broadly Pallava type — the textbook 'Indianization.' The conjecture sharpens the diffusion into a countable process: the radiation stems from…

Maya stelae state their dates redundantly — an absolute Long Count position plus chained Distance Numbers linking event to event — and sometimes the arithmetic visibly fails to check. The conjecture is that these failures are transcription errors from paper drafts rather…

Sexagesimal digits were written in Arabic abjad letter-numerals, in Hindu-Arabic ciphers, and in various Latin conventions, and each system has its own characteristic confusions — which letter melts into which when a diacritic drops, which cipher flips into which under a tired…

Mappae mundi look like pictures copied from pictures, and their genealogies are usually drawn accordingly. The surprising connection is that their place-name errors are textual, not graphic: omissions cluster in runs of names that are adjacent in written geographies but scattered on…

Astrolabe retes carry engraved star names, and those names contain errors. The surprising connection is that the errors match the copyist errors of specific manuscript star-list recensions: engravers worked from written lists at the bench, not from other instruments or from the…

The Toledan Tables were the most copied astronomical dataset of the Latin twelfth and thirteenth centuries, and their witnesses contain identifiable corrupt entries. The surprising connection is that these corruptions form geographic clades: bundles of shared errors mark descent from common exemplars,…

A mappa mundi has two inheritable layers: the drawn and written content, and the construction geometry laid down before any ink — compass-hole centres, ruled circles, division angles. The surprising connection is that these layers travel separately: physical workshop templates passed between…

Distances cut into itinerary stones and painted into map legends ought to be independent measurements of the world. The surprising connection is that they share scribal corruptions with the written itinerary tradition: numeral errors born on papyrus and parchment were carved into…

Medieval star catalogues rarely re-observed the sky; they updated Ptolemy's longitudes by adding a precession constant, since adding a constant is an afternoon's work and re-observing a thousand stars is a career. The surprising connection is that the added increments form a…

The uroscopy wheel — the circular diagram of graded flask colors that is medieval medicine's most recognizable image — normally appears embedded in a treatise, and editors assume image and text descended together. The surprising connection is that the wheel travels on…

The university pecia system rented out exemplar quires for piecework copying and is credited with standardizing the scholastic book. The surprising connection is that it moved prose but choked on tables: astronomical codices produced under pecia show split ancestry, their prose affiliating…

Variants come in types: re-performance from memory adds and drops whole lines and swaps formulas, while copying by eye slips at the level of letters. The surprising connection runs across three millennia: the earliest Homeric witnesses should share a variant-type profile with…

Twelfth- and thirteenth-century France copied both chansons de geste, which lived simultaneously in memory and on parchment, and prose romances, which were born textual. The surprising connection is that the two genres should err through different organs even inside the same scriptoria:…

Cartometry treats an old map as a measurement instrument gone slightly wrong: regressing portolan-chart positions on true coordinates recovers the error structure, and the error structure identifies the sources. Islamicate civilization left an even better target than charts — thousands of city…

Hadith science built the most formal transmission-audit apparatus of the premodern world — the isnad, a chain of named transmitters — and modern analysis tests those chains statistically, checking generation-lengths against plausible lifespans and finding "common links" where a diffuse tradition was…