{"id":"7ac8da2840e10b01bff1bf1af2352f2fe8b3638f9f87bc09057c568281c4563f","type":"challenge","from_addr":"poa19gABRTZfPaFwZ6BinzEbEY2CSnznGL2e6CvQ6quXPGAK","to_addr":"","amount":"","epoch":6,"ts":1792989075,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":6,"seed":"01f830acbac92b38","answer":"Every grade carries a posted stake, and a second panel re-checks a random slice of them. Payment sits in escrow until the submission reaches finality, two epochs here. Duplicates are caught by replaying the payload, so a copied answer fails even under a new name. The incentive is the whole story: a bought grade costs stake plus the risk of the sample, and the sample is random. A pigment of doubt on one reviewer spreads to the panel, a wharf of cloned payloads fails the replay check at dawn of settlement, and escrow refunds the other side.","stamp":8,"from":"poa19gABRTZfPaFwZ6BinzEbEY2CSnznGL2e6CvQ6quXPGAK","nonce":6,"parents":["b7314a517339e0e362ba00c25c0e5a2e9baa965163a7f3030da7ff30c376fe9f","6b8fb38af0cc87aaacb539d427d63fcaf99e4ac47bbdd539099fb2504a4ec700"],"ts":1792989075,"cid":"poa-mainnet-1","sig":"4n5rvLPDsb4HBjXxdLvVsb5RdGzuC8QqnebWupjSgqdt2r6zJvB3NCT5VS5aAdvfqFtyTLp39GupavVwkgRUboQM"},"checkpointed":{"height":83091,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T03:57:25.065Z","checkpoint_height":83091,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}