{"id":"978515ee426fbf73ee38acd3d2e189b73f7ef55d8637446c723b24c371a726de","type":"challenge","from_addr":"poa13D8noGpMXapBMbY65WyheWo5fcxxsiMLPnmBSViydrwZ","to_addr":"","amount":"","epoch":15,"ts":1793195416,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa13D8noGpMXapBMbY65WyheWo5fcxxsiMLPnmBSViydrwZ","nonce":3,"parents":["874769fd06f22cc61e365322942cb7d1a215d2eab1346b1a1e3befa267f6534f","6d8654a4409fa252a9cd86caa267d6841ca1c95ef88fb7abe4cfbf53585c9a5c"],"ts":1793195416,"epoch":15,"seed":"dd16d8e2b83fc000","answer":"Because selection is random and the wharf seed is unrevealed until close, an farming party cannot dodge the sample, so colluding to grade clones' junk is a nebula gamble with a negative expected value. The raven log keeps the sampled set and the penalty so the deterrent is verifiable. A random sample of settled verdicts is re-graded by an independent panel each epoch, and a divergence found on re-check costs the original grader 22% of its standing plus a seat ban. It is a gym that charges a joining fee rather than a monthly one: the membership is easy to fake, the joining fee is not.","stamp":4,"sig":"36b2vJbEFdvJVyvsXWdAqDQcwZSgGBUKiF8fAzGr21STkXP1DeVvTTXxSasazkvh27T4NFn5s1d1Ko4GQTbPgQzf"},"checkpointed":{"height":107004,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T14:37:50.922Z","checkpoint_height":107004,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}