We comment on the theoretical uncertainties involved in estimating the
hadronic effects on the light-by-light scattering contribution to the
anomalous magnetic moment of the muon, especially based on the analys
is and results of Kinoshita, Nizic, and Okamoto. From the point of vie
w of an effective field theory and chiral perturbation theory, we sugg
est that the charged pion contribution may be better determined than h
as been appreciated. However, the neutral pion contribution needs grea
ter theoretical insight before its magnitude can be reliably estimated
.