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  "limits": [
    "Historical test games can recur in different retrospective windows; aggregates are mean per window, not a pooled independent sample.",
    "Does not validate unprecedented 26.20 numeric/mechanism changes or the exact future Worlds schedule.",
    "Historical field proxies can omit announced participants who had not yet played at the cutoff; no later participant identities enter features.",
    "Current roster is extended to 173 fixed states; historical attack ranges/tags come from the matching version and unavailable Locke is masked."
  ]
}