  It is well known and well established by scientific observation that a free
neutron radioactively decays into a proton plus an electron plus an
anti-neutrino with a mean life time before decay of about 900 seconds.
  That established fact conflicts sharply with the hypothesis that the neutron
is composed of two down plus one up quark and that the proton is composed of
one down plus two up quarks.
  That conflict throws doubt on the entire quark hypothesis.
