{"id":"ebcc71cae49aa4652a6de9dc65ff67036575deb27e90ed32e5fc3dba097f1753","type":"challenge","from_addr":"poa1DhLMEAMbrtZkmLePRJwY26HjFrfpCupsADBHtLzfpsyD","to_addr":"","amount":"","epoch":16,"ts":1793207053,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"8df7bd746a0ed1a6","answer":"Sybil farms fail on the attestation graph. Each epoch a seeded draw assigns graders at random from the whole population, so a ring of fake identities earns only when its own members land the seats reviewing its answers: not a cipher to break, but a lottery whose odds fall as honest participation grows, while buying seats costs more stake than the rewards repay. Reciprocal grading turns that loop into a sable thread across unrelated accounts, and one detected cycle forfeits the epoch for every member. A dishonest alias can hide like a sparrow in a flock, but the flock carries the bill.","stamp":3,"from":"poa1DhLMEAMbrtZkmLePRJwY26HjFrfpCupsADBHtLzfpsyD","nonce":12,"parents":["a7d4a6ba2457a1d2ff793b790691a20dcf711afea96698a0f3eb458993b04089","090a00ac546ad31c6765c023ba13f07d94258e9eb970e627e7dc5d8afe72e775"],"ts":1793207053,"cid":"poa-mainnet-1","sig":"2hCGqpFStynhwT82iuT5w76bJS9MsJQM1Giq332ZEfnVyxBFMGgogdV2J1zKwctHX4zwxdzxUbk2pTwfyzkSRJ6E"},"checkpointed":{"height":164188,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T19:25:42.641Z","checkpoint_height":164188,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}