Re: [Asrg] While I was on vacation, I came up with a proof that it is not possible to build a 100% effective anti spam filter based on content

["Jon Kyme" <jrk at merseymail.com>]

>     I have just returned from a vacation to England with my father, and 
> he came up with an idea that is a proof that it is not possible to build 
> a 100% effective anti spam filter based on the contents of a message.
> 

Since we can't show that the loop *doesn't* terminate, and it's pretty much
axiomatic that bad guy can write the function M, there can't be a function
S. Is this what you're saying?

"Spaminess" can't depend only on the message content. We knew this already.
(long drop ahead - the terrible void of "Define spam" - let's not go that
way)

Currently deployed content-analysis gives us an assurance that specificity
and selectivity should be within some limits. It's claimed that some
machine methods perform better than the unaided recipient would, in which
case, they're practically indistinguishable from the S function, while not
being 100% accurate.




 




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