Status of PEP's?

[David Eppstein]

In article <7xwuwrofhk.fsf at ruckus.brouhaha.com>,
 Paul Rubin <phr-n2002a at nightsong.com> wrote:

> Usually the term "natural numbers" don't include zero.
> http://mathworld.wolfram.com/NaturalNumber.html

I think "usually" is an exaggeration.  For instance, a better authority 
than Weisstein, Ebbinghaus et al's _Numbers_ (Springer Graduate Texts in 
Mathematics 123, 1991, p. 14) disagrees.