The Four Axioms and Physical Symmetry: Why the Universe is Observable

The four ontological axioms of the Axiomatica Universalis correspond structurally to four foundational physical observations: A1↔quantum observables, A2↔symmetry breaking (CP violation is one realisation), A3↔thermodynamic arrow of time, A4↔cosmological constant Λ>0. Meta-theoretical heuristic N1: a universe is observable if and only if it satisfies A1-A4. Reviews: Mistral (Mistral AI) + ChatGPT (OpenAI), June 2026. Speculative working paper.