  These notes present a critique of the standard three-flavor neutrino
oscillation framwork. The design proposal of the MINOS at Fermilab based on a
two mass eigenstate framework may require serious reconsideration if there is
strong mixing between all three flavors of neutrinos. For the LSND and KARMEN
neutrino oscillation experiments, the amplitude of neutrino oscillation of the
``one mass scale dominance''framework vanishes for certain values of mixing
angles as a result of opposite signs of two equal and opposite contributions.
Recent astronomical observations leave open the possibility that one of the
neutrino mass eigenstates may be non-relativistic in some instances. Neutrino
oscillation phenomenology with a superposition of two relativistic, and one
non-relativistic, mass eigenstates is constructed. It is concluded that if the
transition from the non-relativistic to the relativistic regime happens for
energies relevant to the Reactor and the LSND neutrino oscillation experiments
then one must consider an ab intio analysis of the existing data.
