RE: Three solutions for spam

[Jeff Hayward]

On Wed, 27 Jan 1999, Len Budney wrote:

   True, but even factually-based prejudice, when based on _correlation_
   rather than _causation_, is mighty risky business.

It isn't prejudice, it is prevention.  The analogy I use is
communicable disease - it is universally acknowledged (at least in
the US) that for the maintenance of public health it is justified
that schools, for example, must exclude students who can not affirm
that they have been vaccinated against some diseases.  This policy
excludes many people who have never been sick in their life, who
aren't disease carriers, simply on the basis that they *can't be
proven* disease-free.  This is not prejudice at all.

-- Jeff Hayward