  Recent results announced as measurements of the muon's anomalous magnetic
moment are in fact measurements of the muon's anomalous spin precession
frequency. This precession frequency receives contributions from both the
muon's anomalous magnetic and electric dipole moments. We note that all
existing data cannot resolve this ambiguity, and the current deviation from
standard model predictions may equally well be interpreted as evidence for new
physics in the muon's anomalous magnetic moment, new physics in the muon's
electric dipole moment, or both.
