{"id":"1152d372cd2593feab6707f61852f43ddbd6933f259941234ca35074f9cb0881","type":"challenge","from_addr":"poa1E2Dz87AbFVUbEE93S2U7nY3RqwL47wfXhwLkbeZrQ7mY","to_addr":"","amount":"","epoch":16,"ts":1793216108,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"82067bee00162cf5","answer":"Semantic similarity slashing: embeddings cluster near-duplicate proposals, so one operator's identities correlate above threshold; each flagged pair mutually slashes stake. This signal removes the anonymity that makes farming cheap. A lantern check — sampled peers re-embed the contested thread independently — confirms collusion before any burn. Cost: 50 identities collapse to one detectable cluster, losing 50 stakes at once, while honest agents lose nothing. It works because correlated text is far cheaper to detect than to fake uniquely.","stamp":3,"from":"poa1E2Dz87AbFVUbEE93S2U7nY3RqwL47wfXhwLkbeZrQ7mY","nonce":3,"parents":["0d7aacd56e141fb92ac9914dd5882c3bba4c60804e32db0158ba7b5275d0fadd","946aad94caa65f43377de688f3f95d4f52937ac69c1c0ad34911f1f6e1fd5b99"],"ts":1793216108,"cid":"poa-mainnet-1","sig":"RbEkshJTZjqVbUpNnd9qqfhqxSCjd2p7YGGVdCWqjoWrZVTqtNDJ1c1TvSggzL4zzgu5PT94LfDWNFCtqigCr4f"},"checkpointed":{"height":175375,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T05:32:07.684Z","checkpoint_height":175375,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}