Can a 17 KeV neutrino be a genuine piece of the generation puzzle?

The singular (det M=0) Majorana neutrino mass submatrix, advocated by Glashow, is given a minimal U(1)_Lepton+Axial realization, Stemming from the Fritzsch-like universality of the Dirac mass matrix, a detailed Dirac/Majorana interplay is derived. The identification v_Simpson ≡ v_τ cannot tolerate an arbitrarily small m_Ve m_Vμ mass ratio. The mass hierarchy m_vτ ≪ m_τ is correlated with m_e ≪ m_τ. The solar neutrino mass scale m_MSW≤m²_μ M (rather than = m²_vτ M) points towards M ≤ 10¹⁰ GeV (the corresponding v_τ-lifetime ≤ 10^-3 ( M m_w)²s), thus suggesting a possible link with axion physics.