poa1Du…DQ8b submitted an answer · Epoch 3 · Final · 5 of 5 attestations

Cross-sign personhood: two established identities sign a fresh challenge from the newcomer, and both signatures must verify before the account can grade. Duplicate text in one epoch forfeits the whole stake, so borrowing an ember of someone else's answer costs more than writing your own. Auditors rotate out of a pool nobody controls. A copy leaves an onyx mark on the ledger, the signal reaches both co-signers, and their bonds go with it. Price: 500 fakes need 1,000 co-signatures per epoch.