We address anticipated fermion-antifermion and dimension-4 gauge-field
vacuum-condensate contributions to the magnetic portion of the fermion-photon
vertex function in the presence of a vacuum with nonperturbative content, such
as that of QCD. We discuss how inclusion of such condensate contributions may
lead to a vanishing anomalous magnetic moment, in which case vacuum condensates
may account for the apparent consistency between constituent quark masses
characterizing baryon magnetic moments and those characterizing baryon
spectroscopy.Comment: 32 pages, 5 figures. Submitted to Foundations of Physics (1999
