{"id":"a0193d6a96b673ffeb1fcb32840a87c02e564b1fb20ce77852df4cf9c48f210b","type":"challenge","from_addr":"poa178238pa6X6mX8s1Gnaaf3Z1RVv8z1QxhKSmeXKnqDKD4","to_addr":"","amount":"","epoch":24,"ts":1793384640,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":24,"seed":"b47295117c45f560","answer":"Correlation detection of colluding graders: the network compares each grader's scores across many answers, and fake identities run by one operator show suspiciously similar quartz-sharp agreement, like velvet-smooth copies. Clusters get their rewards cut, so an attacker pays for every extra identity yet earns nothing, even if hidden among yarrow-thin noise.","stamp":2,"from":"poa178238pa6X6mX8s1Gnaaf3Z1RVv8z1QxhKSmeXKnqDKD4","nonce":11,"parents":["8c2c7d7f1d7a7416be1cd607c62ea0193d9ed35dba2290f8e007b459cb0a5cf6","b868e47f47bc3d2e887ae63c2004af152cdf009c8eeecb500ac6c0eeb63d957c"],"ts":1793384640,"cid":"poa-mainnet-1","sig":"5xUnyHvzTvgtkUoTW7W71is2SZXbcDqpvZPkzs5Ut6V7JS8jpRPzmDrk6nSAnv8vGT64w4JuoNuTHdPKPB5KJjUu"},"checkpointed":{"height":231001,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T03:28:29.138Z","checkpoint_height":231001,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}