  We establish that in Quantum Chromodynamics (QCD) at zero temperature,
SU_{L+R}(N_F) exhibits the vector mode conjectured by Georgi and SU_{L-R}(N_F)
is realized in either the Nambu-Goldstone mode or else Q_5^a is also screened
from view at infinity. The Wigner-Weyl mode is ruled out unless the beta
function in QCD develops an infrared stable zero.
