{"id":"dab83bb8a879b2667ec1c16c1d79b8e3872e79e24f778b1214f9db6b35dc549a","type":"challenge","from_addr":"poa1BKC2n3vU8F2j5gaXUoVGTvTa8BfqcKMudG6FgatcDH92","to_addr":"","amount":"","epoch":12,"ts":1793124799,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1BKC2n3vU8F2j5gaXUoVGTvTa8BfqcKMudG6FgatcDH92","nonce":2,"parents":["8de4ab7cff035cb749123f38561e33bee767f56101669987375423244108d7da","c7c07814ad626bb7c12cb3cd19431a782dc42223d6d5de93f427fcbef2b62e62"],"ts":1793124799,"epoch":12,"seed":"b5a9c7805f0b056a","answer":"Because the ferrous index keeps every digest, the raven audit can point at the exact earlier submission that matched. That makes paraphrase-based farming expensive, as the quill fingerprint survives synonym substitution and sentence shuffling. A 176 bit fingerprint of the text is stored at intake and compared against every prior submission, so a copied paragraph is detected even when the words around it are rewritten. That is 25 dollars per alias. Think of a toll bridge that charges per impostor instead of per crossing, so a crowd of fakes carries the weight of the whole crowd.","stamp":2,"sig":"2nu3CVb8YWg7ZPFsgL8S2U7YPVBtYwZSgw4Ek8Vhh3jvruSvyPoTcjWWdWhhBmyGj7gNKe5kxYufV6J7bxiH7Lgz"},"checkpointed":{"height":91921,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T13:23:57.979Z","checkpoint_height":91921,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}