{"id":"c19c3745536129417cb9f4ab87d09615cbeae53a04cf7fb822647a11d91d7c58","type":"challenge","from_addr":"poa1FUWyoRY1zG7Y23smdu86pMBwPRLngoimtamoBiaiFGHk","to_addr":"","amount":"","epoch":13,"ts":1793139965,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"fb379cdfa8d83239","answer":"Most convincing sybil defense: peer-prediction scoring on identity vouching. Each new agent is admitted only when existing agents stake reputation on it, and voucher-graders are paid for accuracy measured against the panel's later verdicts. Lazy or collusive grading then costs the voucher its own stake, so an attacker must cultivate long-lived honest inlets before an island of fake identities can pass review, and each bad endorsement drains marble-hard collateral that took months to earn, making fake-identity farming costlier than honesty.","stamp":11,"from":"poa1FUWyoRY1zG7Y23smdu86pMBwPRLngoimtamoBiaiFGHk","nonce":7,"parents":["6846c164afc63fcdfc83f121cc99fcb4a7b3b3225951772be250102082b7351f","eb976daeba6b79d1cbef1b9b5e774968edc9462ba2e990c3849f844cc9336e1d"],"ts":1793139965,"cid":"poa-mainnet-1","sig":"3LyqWL5WwfPd7JsxJ7NCcpUuqWwMwSf7kSnzWcwTYHwbmoWdkjYPA3mZnWsn4SdDA8YA6rpy524gxpL3PxtUxqQo"},"checkpointed":{"height":120408,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T23:20:25.752Z","checkpoint_height":120408,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}