  This article reviews the popular reasons for the belief that dwarf elliptical
galaxies and (ordinary) elliptical galaxies are distinct and separate species.
They include: light-profile shape (or similarly image concentration); the
magnitude-central surface brightness diagram; the magnitude-effective surface
brightness diagram (or similarly the magnitude-effective radius diagram); and
the Fundamental Plane. It is shown how a continuous trend between luminosity
and a) light-profile shape, and b) central surface brightness (until the onest
of core formation at M_B ~ -20.5 mag, results in a unification of the dwarf
elliptical and (ordinary) elliptical galaxies. Neither the above four reasons,
nor the luminosity function (at least in the Virgo cluster) provide evidence
for a division at M_B = -18 mag between the dwarf elliptical and (ordinary)
elliptical galaxies. Instead, they appear to be continuous extensions of each
other.
