  Among several subpopulations of a given species with a normally-distributed
trait, such as height, blood pressure, or various test scores in humans, one
and only one of the subpopulations will always strongly dominate all the others
in the right tail, that is, in the high-end values of that trait. Examples are
given to show that this is not true in general for other common classes of
continuous centrally-symmetric unimodal distributions such as Laplace, nor even
for other bell-shaped distributions such as Cauchy.
