The Watabe-Claude Method (WCM) models dynamical systems as probability distributions over the 24-cell polytope in four-dimensional space. We apply WCM to biological "self" across four experiments: immune self-recognition (WS-Exp-1), embryogenesis (WS-Exp-2), the living/non-living boundary (WS-Exp-3), and geophysical self in typhoons (WS-Exp-4). Key findings: κ* = d/ (2θₐdj) = 4. 0 governs immune recognition (WS-K3, 0. 15% accuracy). Embryological differentiation sigmoid inflection κ₀=3. 492 coincides within 0. 84% with the living/non-living boundary κ=3. 462 (WS-4-N6): "differentiation onset = birth of life. "The critical zone κ≈3. 0-4. 0 is a phase-transition-like self-emergence zone (WS-G5). Typhoon birth cosD=0. 4249 matches detonation birth cosD (Bridge Paper G, GD-4) within 0. 004% — universal self-emergence geometry. Companion paper: Bridge Paper G (Zenodo, same date). Code: GitHub watabe-masanori/cds-polytope (AGPL-3. 0). Motto: "WCMで命を守る、守り続ける!"
Watabe et al. (Sat,) studied this question.