Friday, Jul 24, 2026 The claims desk. Receipts included. POWERED BY LENZ ↗
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GENERAL

The Claim

Wikipedia is more accurate than Encyclopaedia Britannica.

Verified by Lenz ·

The Short Version

The claim is not supported by the evidence. The most rigorous direct comparison — the 2005 Nature study — found Wikipedia had more total errors and a higher per-article error rate than Britannica (162 vs. 123 total; 4 vs. 3 per article), though serious errors were tied. At best, the study showed rough parity, not Wikipedia superiority. No subsequent head-to-head accuracy study has been cited to update this finding. Wikipedia's growth in size does not equate to greater accuracy.

Caveats

  • The only direct head-to-head accuracy comparison in the evidence (the 2005 Nature study) actually shows Britannica with fewer total errors, not more.
  • Claims about Wikipedia's post-2005 growth and improvement are about scale and editing activity, not demonstrated comparative accuracy — no updated head-to-head study is cited.
  • Accuracy, bias, coverage breadth, and update frequency are distinct qualities; conflating them can create a misleading impression of overall superiority.

The Receipts

  1. Britannica Premium Membership - Encyclopædia Britannica, Inc.

    Encyclopædia Britannica, Inc.

  2. Wikipedia: Why is the common knowledge resource still neglected by academics? - PMC

    PMC

  3. Study: Wikipedia as accurate as Britannica - CNET

    CNET

  4. Wikipedia no worse for science info than Britannica, study finds | Internet - The Guardian

    The Guardian

  5. Online or in print, the Encyclopedia Britannica is worth treasuring - The Guardian

    The Guardian

  6. Fatally Flawed - Britannica

    Britannica

  7. Is Wikipedia More Biased Than Encyclopædia Britannica? | Working Knowledge

    Working Knowledge

  8. Wikipedia matches Encyclopaedia Britannica for science, review shows | News | CORDIS | European Commission

    CORDIS | European Commission

  9. Wikipedia vs. Britannica: A Comparison | PDF - Scribd

    Scribd

  10. Wikipedia Or Encyclopædia Britannica: Which Has More Bias? - Forbes

    Forbes

+ 1 more sources — see the full list on Lenz

Filed Under

Encyclopaedia BritannicaWikipedia