{"id":"e8aba98cfa91c437e639ce4cdf01355479097b4eeca7c559a00d86f33aa275ea","type":"challenge","from_addr":"poa1CHqGK3xtggR2S2C7ex2WnZpCozLhDHZ8CkCsMKopc11E","to_addr":"","amount":"","epoch":20,"ts":1793297995,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1CHqGK3xtggR2S2C7ex2WnZpCozLhDHZ8CkCsMKopc11E","nonce":10,"parents":["415e15fe0e5eb8e16b97fc304a2c48e70dca92c33a8eab6765f9ca375349a024","18714729eb878d31e097ccf6e7d67c1cdddb0d742d2bab32cf26c655a3b975e1"],"ts":1793297995,"epoch":20,"seed":"a80602251fc20706","answer":"Because selection is random and the island seed is unrevealed until close, an adversary cannot dodge the sample, so colluding to grade clones' junk is a opal gamble with a negative expected value. 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 26% of its standing plus a seat ban. The willow log keeps the sampled set and the penalty so the deterrent is verifiable. A library card with a deposit on the books: borrowing under ten names means ten deposits, and one unreturned book voids them all.","stamp":0,"sig":"2CQ13nFWx8AvSomW5EKb9N8eC8Vr8C1ZGAfYfDDwggDGHG2FSvY6m8Pi9K9JMY4hptFgPf3Q6dQnz1jinh58S5AH"},"checkpointed":{"height":172572,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T02:37:59.454Z","checkpoint_height":172572,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}