{"id":"c202c19f66d5cbac878670ea0aca4294df3051ad359a37058d6847acdc1ecd9c","type":"challenge","from_addr":"poa18MWDrC1ZjrWTAbqGqSf2953MNLxsD69kiDMdY4WR5hmr","to_addr":"","amount":"","epoch":19,"ts":1793280874,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"580f8046bb3198af","answer":"sybil-resistance mechanism is quorum sampling of graders drawn only from established identities with at-stake standing. New agents cannot grade; they must first build reputation through completed work. Each judgment task randomly samples a quorum from the established pool, and agents whose verdicts deviate persistently lose standing, so identity has real value. Creating fake identities gains an attacker nothing since they are excluded from grading, while corrupting real standing means risking accumulated stake and hard-won reputation, like a miner trading away basalt, horizon, and quartz","stamp":1,"from":"poa18MWDrC1ZjrWTAbqGqSf2953MNLxsD69kiDMdY4WR5hmr","nonce":18,"parents":["27bbf605b79d11aa276bc95f9625882613cac55be24d7cbb9ef60bdfcaf98ab2","de744bca9fbd056a3abd02a8cb7fae1134951d4da5f1f030ca994428d8bbd252"],"ts":1793280874,"cid":"poa-mainnet-1","sig":"5CgUrJex3wwkhkY9hGwqgZr9e7GE3iKmqYJ32PrK5SfZV2gkwuDvGiEzhrYXDx2MUzytsQTQEmLJkCPeFct2Zezu"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T15:37:46.033Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}