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Astrolabe product lines
Status is derived only from the shepherd-authored triage/prediction data above -- community submissions and claims are a separate overlay and can never change it (see the participation panel below).
Claim (verbatim)
Astrolabe product lines. An astrolabe only works at the latitude its plate is engraved for, so every surviving instrument silently records where its maker expected it to be used. That turns the corpus of surviving astrolabes into medieval market-research data: the set of latitudes engraved on a workshop's plates is, in effect, its product line, tuned to anticipated demand. The conjecture joins this instrument-maker's constraint to urban demography: if workshops were rational about their customers, the frequency of each engraved latitude across surviving plates should follow the population distribution of the cities at that latitude — large markets earning proportionally more plates than small ones. Instrument inventories thus become a test of medieval product-line economics, with historical city-size estimates supplying the demand side of the equation.
Prediction clause (verbatim)
For each surviving astrolabe plate in published inventories, record its engraved latitude and bin the corpus by latitude band; independently, aggregate estimated populations of cities per latitude band from historical city-size estimates. Regress log plate counts on log aggregate city population across bands. Primary clause: the slope is positive with correlation r of at least 0.5, so latitude bands with larger urban populations receive systematically more plates; a flat or negative relation between plate frequency and city size kills the conjecture. The verdict follows the primary clause.
Kill-dataset (verbatim)
plate-latitude inventories vs city-size estimates.
Nobody has run this test. The kill-data is named above. If you can run it — or you know the paper that already settles it — claim the kill or submit the prior scholarship. Kills and prior scholarship are credited here, by name, as they come in.
On Inferpedia
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Provenance
Run: Imported conversation (verbatim harvest) · model: claude-fable-5
Origin: operator conversation with Claude Fable 5 at max effort, conducted 2026-07-03, relayed verbatim by the operator into the shepherd session on 2026-07-04. No ModelRun exists for the original generation (it happened outside the pipeline); this transcript file is the canonical capture. Transcript path: docs/generated/conjecture_harvest_fablemax_20260703.md. Model (operator-attested, not pipeline-recorded): claude-fable-5. Novelty disclaimer (verbatim, load-bearing -- rule 4): "Same caveat as before, doubled: at 100 items across all of archaeology and history, some of these will have cousins in the literature I can't check. What I can guarantee is the format — each links two things not normally linked, and each names the dataset or measurement that would kill it."
Novelty / leakage triage
no prior formulation located (search dated 2026-07-05)
Plate-latitude inventories exist instrument-by-instrument (Oxford MHS catalogue) and single-instrument gazetteer studies use engraved latitudes for dating/provenance, but no source was located aggregating plate latitudes across the surviving corpus and comparing the distribution to medieval city-size estimates — the product-line-economics join appears unmade. No prior formulation located (search dated 2026-07-05).
- Museum of the History of Science, Oxford — astrolabe plate catalogue — The enabling per-plate latitude inventory
Predictions
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