Nonfiction And Reference Codexery — Data & Quality

We publish our audit record because accuracy claims should be checkable. Every entry on this site runs through an automated fact-audit pipeline (accuracy audit → source-grounded repair → visual QA); this page is generated from that pipeline's own report, not written by hand.

Last full accuracy audit: 2026-08-31 · 10 entries checked · 1 flagged · 2 issues confirmed · 1 corrected · 1 still open

Recent findings (audit lane, verbatim)

Textbook — The claim that four publishers control 90% of market revenue is outdated; current data shows their combined share is around 80% or less.

Textbook — The claim that 76% of teachers said new editions were justified half the time or less lacks a verifiable source and is not a widely established fact.

Open data

All content is fetchable as JSON at /data/content/ · llms.txt · sitemap

Corrections

Spotted an error? Suggest an edit — reader reports go straight into the audit queue.

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