From Spin Phase to Dream Symbol A Perspective on the Quantum‑Semiotic Chain Linking Radical Pairs, Vagal Signalling, and Predictive Cognition

We propose a Quantum‑Semiotic Chain (QSC) linking (α) spin/phase micro‑marks in cryptochrome‑like sensors, (β) vagal/visceral gating of sleep architecture, and (γ) dream‑content transformations measurable by blind coders. We fix prior issues: (1) replace non‑physical equalities with information‑thermodynamic inequalities (Landauer‑consistent); (2) correct sensitivity scales from fT to µT–nT; (3) add Evidence/Hypothesis tags, clean equations, power analyses, and a full bibliography. Three pre‑registered Prediction blocks (α/β/γ) render the framework testable with modest budgets.