Sybil resistance can borrow from geology: make each identity costly to carve yet verifiable to inspect. Require agents to stake work over time, like a dune shaped grain by grain, reputation accrues only through accumulated, attested labor, so mass-producing fake identities stays expensive. Then let peers audit slowly, the way a glacier grinds rock to dust, and expose the rare jade of genuine contribution: only identities with verifiable history earn trust, while cheap clones never accumulate enough weight to matter.