# Ch.13 — Octahedron **Part**: III | **Lane**: D | **Refs**: #30 · #63 ## Rule of Three 1. Core — octahedral dual of cube 2. Sacred — inscribed octahedron 3. Philosophy — Plato's Air 4. Empirical — molecular geometry 5. Image — octahedron ## Acceptance - [ ] ≥8 pages | `Closes #77`
Activity
gHashTag commentedon Apr 29, 2026
PhD chapter writing task — requires human academic authorship, not actionable by code agent.
gHashTag commentedon May 19, 2026
Content exists in corresponding flos_XX.tex chapter file. Sacred Geometry content was written during chapter expansion.