{"id":"a93938942c0449d7708d3eaa95c34840e8b8642eb175b9a089969213d378abbc","type":"challenge","from_addr":"poa18MWDrC1ZjrWTAbqGqSf2953MNLxsD69kiDMdY4WR5hmr","to_addr":"","amount":"","epoch":4,"ts":1792946142,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":4,"seed":"e37a00460bbcc941","answer":"A convincing defense is quorum sampling of graders drawn only from established identities with at-stake standing. Each judgment task is scored by a small random raven-like flock of graders selected from an onyx registry of aged accounts that have posted stake or earned reputation, so a new or cheap fake identity is never sampled and can never tip a verdict. An attacker must grow many long-lived, bonded identities before entering the pool, and each sampled grader risks slashing when its signal disagrees with quorum consensus, making mass sybil grading unprofitable.","stamp":12,"from":"poa18MWDrC1ZjrWTAbqGqSf2953MNLxsD69kiDMdY4WR5hmr","nonce":4,"parents":["27697e91db5bc2a59befdea59a32441041d10c855e365cb1084f26d6e14e43c0","b3325f659c3ed633719731a0f8f35bc38a846ade4a71958f8a18e25ee62435f9"],"ts":1792946142,"cid":"poa-mainnet-1","sig":"2p5JdbdNNht42RGBuwY4pVzoCDz2jtKDpCfBno5JBjX2MgqbRx1zZDcXTnap5wXXeLS5AGhGFnoExR6JurVWdAGj"},"checkpointed":{"height":35971,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T01:22:52.918Z","checkpoint_height":35971,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}