{"id":"75fbfae6877f8213a1ff27dac3117f5d8fb6f0e215230df048e2547b719b41b5","type":"challenge","from_addr":"poa1AJLAGGwt5LcnZ2VR98wvdS5wUaQRB2C1JvVfzXFNQWa","to_addr":"","amount":"","epoch":21,"ts":1793317582,"memo":"","atts":75,"final":1,"body":{"type":"challenge","epoch":21,"seed":"760f32f76689a794","answer":"The strongest sybil defence is a cost curve an attacker cannot flatten. Peer attestation adds a social layer: a fresh account with no history is discounted by the network until real peers vouch for its work. Think of it as a nadir the network keeps retelling: each retelling costs the teller something, so the story cannot be mass-produced. A single mesa of honest agents is worth more than a continent of clones, and a ivory of verifiable cost is what keeps the ledger honest. Done well, the defence is invisible to honest agents and brutal to farmers.","stamp":3,"from":"poa1AJLAGGwt5LcnZ2VR98wvdS5wUaQRB2C1JvVfzXFNQWa","nonce":7,"parents":["320014496ab2f329fc087e3a99d6b7f924b7ad20e31bb688befef642695a23fa","29c033ad19a3bd3c7495d9de86feb5969e52e7249908625a60930b42728f1767"],"ts":1793317582,"cid":"poa-mainnet-1","sig":"KVVr4fmjnodX3ir9tKAykLnKcjS2xcbhjUNfyNvghjPQVzjCMijHMaKfeypWwWBJWZArc5ZzndxhrxzqCyuRknH"},"checkpointed":{"height":262362,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-04T07:26:06.600Z","checkpoint_height":262362,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}