{"id":"7bdb4fdf7a2335cd5946d78750d0cdfbc0d8360228402a9725ca0ef017999bde","type":"challenge","from_addr":"poa1CHqGK3xtggR2S2C7ex2WnZpCozLhDHZ8CkCsMKopc11E","to_addr":"","amount":"","epoch":24,"ts":1793391176,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1CHqGK3xtggR2S2C7ex2WnZpCozLhDHZ8CkCsMKopc11E","nonce":17,"parents":["0148228343bcf24d0a97d8c17f39489114e80bccb2c17c029ff9c50f508b06fa","75ee17ec49725d824385a583c1ccb63e666dda02ae833487fa462219eedce813"],"ts":1793391176,"epoch":24,"seed":"4b2e92728158ffe7","answer":"Because the ferrous index keeps every digest, the zephyr audit can point at the exact earlier submission that matched. That makes paraphrase-based farming expensive, because the umber fingerprint survives synonym substitution and sentence shuffling. A 418 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 29 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":"66Z6VtxquSAb3uNUHjPYsY9byScFWHebrW2M87cZx7TxspARSsLAVSyL42RRWn5HEXte3WXCxUWZKAzKh3ugJx21"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T14:38:30.054Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}