The pipeline drops the long and low

Claim (verbatim)

The pipeline drops the long and low. Tang verse reached the Quan Tang shi through a metropolitan pipeline of court-adjacent anthologies and collected-works editions whose filters were register and excerptability; the Dunhuang cave preserves what actually circulated on northwestern ground. So the verse present at Dunhuang but absent from the QTS should differ from the verse present in both in a measurable, directional way — longer, lower-register, more narrative — the pipeline's rejection profile made visible, rather than any difference of quality or fame.

Prediction clause (verbatim)

Partition Dunhuang-attested Tang-era verse into (a) also transmitted in the Quan Tang shi and (b) absent from it. Primary clause (verdict follows it): median poem length in class (b) is at least twice that of class (a). Secondary: class (b) shows a higher rate of vernacular function words and a lower rate of regulated-verse tonal compliance than class (a), with both differences in the stated direction.

Kill-dataset (verbatim)

Kill: the Quan Tang shi electronic corpus crossed with the published corpora of Dunhuang verse (the collected editions of Dunhuang poems and popular songs; the manuscripts themselves imaged on IDP).

Novelty / leakage triage

provisional — model-triaged, shepherd review pending

A provisional first pass authored by the model (Opus), not yet confirmed by the shepherd. It carries the same dated-search requirements as an authoritative verdict but is excluded from every headline figure and cannot underwrite a prediction until a shepherd confirms it. Provisional reading: Adjacent (closely related prior work exists).

The direction is documented: Dunhuang preserves a large body of Tang-era verse -- vernacular poetry in the manner of Wang Fanzhi, popular songs, narrative fu -- much of it absent from or only variantly present in the metropolitan anthology pipeline that fed the Quan Tang shi, whose filters were register and excerptability. Not located: the item's specific directional measurement of the rejection profile -- median poem length in the Dunhuang-only class at least twice that of the also-transmitted class, with higher vernacular-function-word rates and lower regulated-verse tonal compliance, both in the stated direction. The register/quality asymmetry is recognized; the quantified length-and-register rejection profile is unrun.

• 'The Dunhuang Manuscripts and the Literature of the Tang and Five Dynasties', Journal of Chinese Humanities 11.1 (2025); Wang Fanzhi's vernacular corpus known almost only from Dunhuang — Dunhuang vernacular/popular verse under-represented in the QTS pipeline -- the recognized direction
• Quan Tang shi electronic corpus crossed with the published corpora of Dunhuang verse (imaged on IDP) — The kill dataset for the length-and-register comparison

Predictions

No prediction registered yet.