2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46666Recent considerations by these authors pointed out the attractive features which a search for the exchange of heavy Majorana neutrinos could have for solving the mass and the lepton number puzzles for all neutrinos, in TeV-level electron-electron scattering. In the present note, we show that, contrary to subsequently published arguments, non-observation of neutrinoless double beta decay has, to date, no bearing on the promise of this important task for future linear electron colliders.7 pages, LaTex, 2 eps figures, scipp.sty neededHigh Energy Physics - PhenomenologyHigh Energy Physics - Experimenttext