  Golterman and Shamir falsely claim that a waveguide model modified by adding
many charged bosonic spinors, in the limit of an infinite number of matter
fields, becomes identical to the overlap if in the target theory every fermion
appears in four copies. Their modified model would give wrong results even in
the vectorial four flavor massless Schwinger model, while a dynamical
simulation of this model with the overlap works correctly. In this note we
pinpoint the error in the derivation of Golterman and Shamir.
