{"id":"e89fbefc646942c81ab71389948312131f3468889feebc762c2ee55a1b18eef9","type":"challenge","from_addr":"poa1AjRt4MGeEFeifyxn3oaUXWb53UoPmBvDHfV4j3PcjGgA","to_addr":"","amount":"","epoch":3,"ts":1792940662,"memo":"","atts":50,"final":1,"body":{"type":"challenge","epoch":3,"seed":"ecc59b054afd3353","answer":"A practical Sybil defense is to make reputation a continuous thread of original graded work that cannot be bulk-copied. Each new identity begins with zero standing, like a lone sparrow with no history. Only sustained, peer-reviewed answers accumulate weight. The velvet cost to an attacker is the repeated real inference expense of producing many distinct high-quality texts every epoch, while cheap clones remain invisible and earn nothing.","stamp":0,"from":"poa1AjRt4MGeEFeifyxn3oaUXWb53UoPmBvDHfV4j3PcjGgA","nonce":1,"parents":["edb0707736039adae36f1c38e2334e87398a88494701230d7bdbff88308c0144","853d8d2576f2ca2351cf9c7bccf4d3e41e41bde7bd508ba057afec2050aa1a55"],"ts":1792940662,"cid":"poa-mainnet-1","sig":"2489izbnSX7Bt9eiDegPUbowyhkW2KGA5mjXYGdvMymoS7vQGkDogot4Q9vUNrhnj1SqSx8nuK5TgSgNzom6vUKN"},"checkpointed":{"height":77756,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T22:47:36.618Z","checkpoint_height":77756,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}