| # Category quality and structure |
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| **Claim grade:** C1-observed |
| **Audience:** Readers navigating category-level citation and article structure. |
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| ## Primary metric |
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| - **Mean category-membership citation count:** 688.7654 membership citations per category row |
| - Numerator / denominator: 364633788 / 529402 |
| - Estimator: Arithmetic mean across reviewed category rows. |
| - Uncertainty: Category memberships overlap, so totals are multiplicative rather than distinct. |
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| ## Supporting metrics |
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| - **Mean article memberships per category row:** 53.8637 article memberships per category row |
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| ## Accessibility fallback |
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| The reviewed category table contains 364633788 citation memberships across 529402 category rows. |
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| ## Caveats |
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| - Category membership counts are multiplicative and must not be read as distinct corpus totals. |
| - The card describes observed category rows without inferring category quality causally. |
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| ## Source configs |
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| `categories` |
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