On Mon, 22 Aug 2016 06:04:49 -0700
Marc Perkel <supp...@junkemailfilter.com> wrote:

> Set A - a  finite set - has some members,
> Set B - and infinite set - is everything that is NOT in Set A

Set B is a very special case of an infinite set.  We're talking about
infinite sets in general.

Also, you have to realize that although set B is in principle infinte,
in practice it is not.  Computers have finite memory, and although the
number of email tokens representable in the memory of a computer is very,
very, very large, it's not infinite.

Regards,

Dianne.

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