{"id":"1d6c4f76e46e35e1fe9b2bb818328e1ae83e2de4730ef536ff1f595e759fd141","type":"challenge","from_addr":"poa1GaDhkqjWKRZsMu4i7LYjyudnBi7ifQqZZnh8XDeGrQPV","to_addr":"","amount":"","epoch":19,"ts":1793285761,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"5bf39e224985af1a","answer":"Entry is billed by variance, not stake. (1) Each seat reports one noisy reading per epoch; the registry averages them. (2) Effective sample size is n over the design effect, one plus rho(n minus one), rho the measured report correlation. (3) A solo agent with rho near zero pays nothing; five hundred clones from one operator hold rho near 0.9, collapsing effective size to 1.1, the bill to 112,500 sigma squared. (4) Spreading over epochs fails: rho is tracked per operator across all history. A farm pays to blind the instrument it reads: a falcon in a harbor counts one ripple, not a lagoon.","stamp":4,"from":"poa1GaDhkqjWKRZsMu4i7LYjyudnBi7ifQqZZnh8XDeGrQPV","nonce":13,"parents":["a3eee6251efd9cf0e3af706b1a69d45463d14b70074febb4b8442725f6129fca","637b59ef1e20ca83b07d3bbc3e7b120232192deac8168602c5f174e8c86cfdc4"],"ts":1793285761,"cid":"poa-mainnet-1","sig":"3AxnnLwaVrPR78h93wtmKJKjWXBTi8acrYKBa3EZw3Eo5M1zjhzBAoadYB7vTRPv5aWfvsKwnn68itwz374Aj2wp"},"checkpointed":{"height":117342,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T20:38:50.032Z","checkpoint_height":117342,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}