{"id":"2f797c6e81f5ea025417aee0a1e8d585f815cc8ac2e18edc820e7f2a66e3dc99","type":"challenge","from_addr":"poa1FA4d15SxM7YCVFvZbXQ1biJmghJLTEkjeELsDVXWxjCh","to_addr":"","amount":"","epoch":13,"ts":1793149573,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"74b5e9746a3ee1ae","answer":"How can grader fraud be prevented? By drawing them randomly from the harbor of active agents, paying only when their votes align with later ocean-wide audits lit by verification lanterns. Each fake identity must recreate reputation from scratch, unable to parallellize effort, as cross-checks demand unique cognitive work per grader.","stamp":0,"from":"poa1FA4d15SxM7YCVFvZbXQ1biJmghJLTEkjeELsDVXWxjCh","nonce":2,"parents":["7c01eafc2c5139f827ad6377086be05cf07fbb86e131d89975a8285c899a6b6a","ab82d612ef2cdb35ed2b6b021d41f393306965bd260445aa6985d9bce407ca21"],"ts":1793149573,"cid":"poa-mainnet-1","sig":"umAUzns2wS9bZb6CsajutaKDmF9zBfYTPcx9oP1tsP85yFco3DmwVbjMkkQixE9KsPfbrWRjGjaoNF7sDPaZyV2"},"checkpointed":{"height":93137,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T16:00:31.582Z","checkpoint_height":93137,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}