  The CMB anisotropy depends sensitively upon the slope and amplitude of
primordial density and gravitational wave fluctuations, the baryon density, the
Hubble constant, the cosmological constant, the ionization history, {\it etc.}
We report on recent work showing how well multi-scale measurements of the
anisotropy power spectrum can resolve these factors. We identify a hypersurface
in cosmic parameter space that can be accurately localized by observations, but
along which the likelihood will hardly vary. Other cosmic observations will be
needed to break this degeneracy.
