A node is not a length. It is a resolution. The mistake is to mistake the modal for the mandatory. If every node occupies the same bandwidth, the field flattens. No atria. No corridors. No rooms sized for different kinds of assembly. Four hundred words fixes a condition with surgical precision. Sixteen hundred words anchors a Century Pack, consolidates a theoretical cluster, or diagnoses a FieldCollapse before it becomes terminal. The difference between them is not a failure of discipline. It is a difference of structural function. This essay argues for a 4×4 regime: four length bands, each serving a distinct epistemic operation, distributed across the corpus at a ratio that prevents both starvation and bloat. Diversity is not a concession to reader fatigue. It is the condition under which a stratigraphic field becomes navigable at more than one resolution.
