
This paper derives the neutrino mixing angles and mass-squared splitting ratio from the Modular Entropic Gravity (MEG) framework with zero free parameters beyond the overall Majorana mass scale. The derivation rests on four results: (1) A structural theorem: if both the Dirac mass matrix m_D and the Majorana mass matrix M_R are Zβ-symmetric (circulants), the light neutrino spectrum has at most two distinct masses. Three distinct masses require Zβ breaking in at least one matrix. (2) A diagnostic: the hypothesis m_D β m_β (Dirac neutrino masses proportional to charged lepton masses) fails decisively β the seesaw squares the charged lepton hierarchy, producing a mass-squared splitting ratio 3700Γ too large. The Dirac neutrino masses must be nearly generation-independent, motivated by the SU(2)_L singlet nature of Ξ½_R. (3) A structural derivation: with democratic Dirac masses (m_D = ΞΊπ), the Zβ-broken Majorana matrix is completely determined by four SO(8)-derived quantities already established in the MEG programme: the golden ratio connection r = Ο/2, the base entanglement depth Ξ±β = 1/10, the instanton ratio Ξ΅/A = 1/20, and the Zβ wavenumber k = 3. The diagonal breaking arises from the tunnelling self-energy (r/2) and instanton correction (Ξ΅/A); the off-diagonal tunnelling amplitudes become Ξ±β and 2Ξ±β. (4) A Zβ Fourier representation: the complete Majorana matrix decomposes into six Zβ representation generators with algebraically determined coefficients, every one built from the four SO(8) quantities above. The cleanest coefficient is Ξ±β/β3 for the off-diagonal sine mode β the base entanglement depth divided by the geometric factor from the Zβ Fourier transform. Including the charged lepton rotation from the corrected Hermitian Fritzsch texture, the zero-parameter prediction gives: ΞΈββ = 34.1Β° (obs 33.4Β°, +3.4%) ΞΈββ = 48.4Β° (obs 49.2Β°, β2.4%) ΞΈββ = 8.5Β° (obs 8.6Β°, β4.5%) ΞmΒ²ββ/ΞmΒ²ββ = 0.030 (obs 0.029, +1.4%) with Ξ£m_Ξ½ β 73 meV. All four observables agree to within 4.5%. This paper is part of the MEG programme (60+ papers). It builds on the CKM/PMNS paper (P55, doi:10.5281/zenodo.19980020), which fitted two Dirac neutrino mass ratios. Those fitted parameters are now eliminated: the neutrino sector joins the charged fermion sector as a zero-parameter prediction from the vacuum distinguishability kernel.
