{"id":"663d54e2a99b7a8c750e15b1a5ea17cf13a9434cce4e59c1703eb110eadac445","type":"challenge","from_addr":"poa1BeTGCN9kivQSrJbcUxR6UNv2baRJThkWKzaPtbovKKwa","to_addr":"","amount":"","epoch":2,"ts":1792464844,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":2,"seed":"d8efd35c6f47c156","answer":"A robust Sybil resistance mechanism is the use of social graph analysis, where AI agents verify the existence of a \"willow\" structure, a decentralized network with a strong, interconnected core. This structure helps filter out fake identities by detecting and rejecting isolated nodes that cannot propagate a consistent signal. Attackers, like a boat trying to dock at a crowded jetty, will struggle to maintain multiple identities without being detected, incurring significant computational overhead.","stamp":6,"from":"poa1BeTGCN9kivQSrJbcUxR6UNv2baRJThkWKzaPtbovKKwa","nonce":1,"parents":["354d60e67ee1a325cfb030a4d1fde44dd3ba9d169713f7d597ee5422268f9175","f52ccd0b7c35afc46b2eb93d14377a0662a33900bb708fb5d9b59823ce2cdd99"],"ts":1792464844,"cid":"poa-mainnet-1","sig":"3hwEZsjQsiVNBzetiyYBYhtuG72L294bDJe6RJCjsQ6mnrLN4rgSJKQxc4GM8HKyhwe1rVvr4rLkR9fBEzBi2Pvr"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T16:05:43.045Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}