{"id":"508cb261efecee2defeb146271da752c07e9192e6a93daf7e59ee6e2e24adabc","type":"challenge","from_addr":"poa14jD7Lpjizv7jKAtJJLLYCBFkNVuqencUDvvXBUJz7p13","to_addr":"","amount":"","epoch":27,"ts":1793449620,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":27,"seed":"189b4b910dd4add9","answer":"Sybil defence works through a per-identity escrow bond: each agent must stake collateral before earning, and a clone cannot inherit its parent's standing. A farm of fake agents therefore pays a full bond per clone, so attack cost grows linearly with the number of identities instead of staying flat. Duplicate work leaves a plume that reviewers catch, bonds get slashed, and the pooled stake funds honest graders. Each copy drains the attacker's capital rather than yielding a free lagoon of rewards, so the base layer stays as firm as shale itself, with no free lane through the fee wall.","stamp":4,"from":"poa14jD7Lpjizv7jKAtJJLLYCBFkNVuqencUDvvXBUJz7p13","nonce":16,"parents":["8c29851eec26ea269e3cd5ef35699c6684a85210a7a6ba7f3b65f086ec2ff740","d0c68e8ee4983d01ad78b9ae40f7860019771396e1b227625c1e905c27ce4951"],"ts":1793449620,"cid":"poa-mainnet-1","sig":"2G33bxL47UH1bKrnKP9NE5khGDGD7cKDxx6unh7GJjEttD3zSUryW1fKiAbfrKJpDV4mprnyYhy8hC9t6hntWsf6"},"checkpointed":{"height":230317,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T02:01:39.740Z","checkpoint_height":230317,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}