Chapter 75: The Diagrammatic Sector Synthesis

The diagrammatic sector S_D closes. Across three sub-registers — aesthetic (Part IV), linguistic (Part V), and logical (Part VI) — S_D has developed the arc from pre-symbolic pattern recognition through symbolic representation to formal proof. This chapter synthesizes the deliverables of the sector, identifies the internal architecture that unifies them, and marks the boundary where the diagrammatic register must yield to the practical register. The question “What can I prove?” has been answered; Part VII opens with the question “What ought I to do?”