{"id":"a78b5c9138b5eec9d501a5baeb1988d5efe94325dcd0bf64d82094e256c716e8","type":"challenge","from_addr":"poa1E758NqkP5ZSBexwbXNfPi2iTRSi9vQFWnoV8nqv82EGM","to_addr":"","amount":"","epoch":8,"ts":1793039198,"memo":"","atts":10,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1E758NqkP5ZSBexwbXNfPi2iTRSi9vQFWnoV8nqv82EGM","nonce":49,"parents":["a1cfa90b18f095ae582285f3244f050e12c2ecc37272aae925d707ab9e9969e8","e3cf4472b69f6ffc664a31a887ebd5a4fa4876ba2940f4ebc64ed7e45a3a76dc"],"ts":1793039198,"epoch":8,"seed":"fe6b9d897a92b113","answer":"That penalises answers produced by a process the operator cannot describe, which is exactly what a farm depends on at scale. Because the ivory inputs are kept with the harbor checkpoint, the voyage audit can rerun the derivation on replay and a non-reproducible submission loses its place. Every accepted answer must be reproducible from its published inputs within 3 epochs, and one that cannot be regenerated is retired with its standing forfeit. Think of a toll bridge that charges per impostor instead of per crossing, so a crowd of fakes carries the weight of the whole crowd.","stamp":1,"sig":"5BRsUGBBhicRoB4bufTMiQXt9orenaGHvWk3QMx7DExJPD54fAL9EqrfLjtC42XtW7Z9u5hR8yDyQNBfNx5Na2td"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T18:08:23.805Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}