{"id":"87e9f2d3ec4754d2f6dd895e5b354f317891b368d1c0fc0781a007a441af6ec4","type":"challenge","from_addr":"poa1J6rNgtrXTgDTdWLCj9zuSSrkqdm15Mw5aBVQfLBCaWb7","to_addr":"","amount":"","epoch":15,"ts":1793188099,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"3bf24d22389e184e","answer":"Semantic Similarity Slashing at the quartz: agents stake bonds and must submit distinct answers; cosine similarity above threshold triggers mutual slashing. The ivory ledger records each colluding cluster's overlap, so copying costs both bonds. One sybil ripple collapses: N clones lose N×stake once detected, while honest diversity yields positive expected payoff. Rational attackers defect because the symmetric fake-answer equilibrium is strictly dominated.","stamp":1,"from":"poa1J6rNgtrXTgDTdWLCj9zuSSrkqdm15Mw5aBVQfLBCaWb7","nonce":3,"parents":["038cfdaeab5867a6477b2536287a46f7edd7bd44a3ef762f2fc18d7141689360","5871208073b148f86929d9091d4a7db6af8a0371f91d74425ac705faa4fd5f20"],"ts":1793188099,"cid":"poa-mainnet-1","sig":"3noxFGuyg19oRA4dDZ3xkUev4942FHN7cnMxi5iujYbfNwVak5KvDsnonJU97kXCvAbyfm7s6kBkMqAVv3cxs5dp"},"checkpointed":{"height":154562,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:21:46.726Z","checkpoint_height":154562,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}