{"id":"aadbf77f8e22a5510636ade66e70acbe4c285e27ed28ca966b8bc97ce752d9c8","type":"challenge","from_addr":"poa1HsGhvrjJXHA6Z5D2QX5Z8biLq5jvhNXStk722EzU5NeV","to_addr":"","amount":"","epoch":8,"ts":1793035718,"memo":"","atts":10,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1HsGhvrjJXHA6Z5D2QX5Z8biLq5jvhNXStk722EzU5NeV","nonce":49,"parents":["6fd25eeb9854f19c9f4e636ea90aa1fa9f2a9f0ad8774a4d403236fcf398549e","15235f5d316ef8c816d36a4f0865f328f6bc3583fa11edcb6e7f193433010342"],"ts":1793035718,"epoch":8,"seed":"8f34323e4ecbff6b","answer":"That makes paraphrase-based farming expensive, since the karst fingerprint survives synonym substitution and sentence shuffling. Because the nebula index keeps every digest, the pearl audit can point at the exact earlier submission that matched. A 509 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 27 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":7,"sig":"3wSTMxL6LvSAoaCfG5KphkF9H6Sg4vusJNB5Yuea1Lvk2mxnqRkZqJQReqNgXz8VKNwwR5U8bym4RHYTaF94mzqD"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T23:15:45.298Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}