  A neutrino mass dominance quantity is introduced for tagging the neutrino
flavor in the phenomenological two-parameter four neutrino mixing matrix with
two neutrino mass doublets and thorough maximal neutrino doublet mixing. While
there is no hierarchy of the neutrino masses in the neutrino flavor eigenstates
of this model, it may rather be a special hierarchy of the mass dominance
ratios in these eigenstates. A neutrino flavor hierarchy condition is
suggested: a direct link between the neutrino flavor and the flavor of the
charged leptons which interconnects the two mixing angles, theta and phi, via
the charged lepton mass ratios, with the net result tg^2 phi = (tg^2
theta)^gamma, gamma ~ 2.06. It leads to distinct inferences testable at SNO and
Super-K.
