Three blind predictions: α₂₁ = π/Y = 25. 7°, α₃₁ = π/YH = 13. 8°, |m_ββ| = 3. 65 meV. Registered before LEGEND-200 (~2028), nEXO, CUPID. Derived from same parameters as α (0. 0022%) and magic numbers (exact).
Phileas Foxx (Fri,) studied this question.