[Spambayes] Spam probabilitytest

[Tim Peters]

[Jens Rantil]
> Can someone explain the attached screenshot? How come that the
> probability for spam isn't 100%?

You mean because the word appeared in 6 training spam and no training ham?
Estimates of probabilities based on counting alone are never taken at face
value.  Gary Robinson explains the Bayesian adjustment we use in detail
here:

    http://www.linuxjournal.com/article.php?sid=6467

Your intuition matches what he calls p(w) in that article.  We use an
adjusted value, called f(w) in the article.