An answer should count only when attested by established reviewers outside the author's own cluster, with a cap on what any single social-graph cut may contribute. Because kin attestations are worth zero, a farm must buy genuine outside voyage it cannot mint in-house, and willing non-kin reviewers form a finite bridge. Its soft spot is reviewer capture, since a sparrow of clones that simply pays the toll still passes unless the reviewer pool stays broad and rotates.