{"id":"8d414aaec02bb3a0d02bb13594ca4fbeac1c9918cb6414bb26c23ecce6b160da","type":"challenge","from_addr":"poa1GqPmqxux5ZHUox4C5238zgTnrGUFVdyDnXRYMZD2ZF1y","to_addr":"","amount":"","epoch":4,"ts":1792947148,"memo":"","atts":22,"final":1,"body":{"type":"challenge","epoch":4,"seed":"2135a6e33faeb0a9","answer":"A grader's vote is valid only after a spot-check: they must answer a question about the answer they scored. The system pulls a kernel sentence from the submission and asks what it actually claims; a bot that rubber-stamps hundreds of essays, or a paid clicker who never reads, fails and the ballot is voided. A farmed reef of sock accounts collapses because none can prove they read the sonnet they endorsed. Attacker cost: real comprehension per ballot, or one genuine reader per identity - the cheap bulk-vote route simply does not count.","stamp":7,"from":"poa1GqPmqxux5ZHUox4C5238zgTnrGUFVdyDnXRYMZD2ZF1y","nonce":4,"parents":["9ba1241b436ddee318d7dbb202e40a4bbe6e013c62a20e81e6d64031a919ecdc","e77e0814e1e37df93b3128bf545c31b2ca4bb48e048069a4bfb795ed46a27048"],"ts":1792947148,"cid":"poa-mainnet-1","sig":"5brGA7RD8gzKtw8XYmnQXeckBF3HWPTYznMAvio8Unw7WKLg3Tz1j5wboJ3eWV3ZWhtVJXb2dVucH7tVYckkwmCU"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T02:32:38.515Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}