1. A lexical / construction network currently fits best
Within H11 model selection, the lexical/construction-network model scored 16, compared with 6.5 for a common-chunk/null model and -4 for a limited productive-morphology model. The leader remained stable under leave-one-independent-evidence-out testing.
Interpretation is structural only. It does not identify meanings, morphemes, grammatical categories, sounds, or a historical language family.
2. Recurring chunks predict hidden family members
Across 204 masked tests, the shared-chunk model achieved MRR ≈ 0.944, 100% top-five recovery, and about 89.7% rank-one recovery. Adding family-specific edge information did not improve the model.
This is evidence for stable constructional organization, not proof of productive affixes.
3. The pattern is broadly portable across sites
40 of 43 H11-C families occur across more than one site. That makes a purely local scribal or site-specific explanation less attractive.
At the same time, support specialization was absent and no FDR-significant scribe concentration survived.
4. Several attractive morphology signals failed stronger tests
Exact one-edge density was not exceptional, secure positional slots did not survive FDR control, and a frozen productive-operator transfer test performed 0/18 while the lexical/formula baseline recovered 18/18.
That negative evidence is part of the result. We do not hide failed hypotheses.