- Limits: Structural only: says nothing about meaning. Not unique: Kalevala metrical verse shows the same within-line rhythm on 15/15 blocks (c-456), so ordinary metrical line-filling is a live explanation. Not a first-ever result: Gaskell and Bowern 2022 measured word-length autocorrelation (flattened); the within-line vs cross-line split is unverified against the wider literature. One line (Voynich Ninja external) is unverified.