On Thu, Jul 03, 2008 at 05:00:13PM -0700, Robert Case wrote: > I noticed that in many of the messages that got through were hitting the > BAYES_00 through BAYES_40 rules. I looked at the rules page, and the scores > for those rules are negative (ranging from -2.599 (eek!) to -0.185). When > you get to BAYES_50 and higher, the scores turn positive. Also, in many > instances, the negative BAYES_* scores made the difference between reaching > the threshold and not.
Yep. > My question is WHY are those rules negative? Because they are ham detection rules. > I went ahead and assigned a positive score for those rules (ranging from > 0.001 to 0.040), but I figured I had better ask here why those scores are > negative. I'm figuring there's a good reason, and I don't want to shoot > myself in the foot. Bayes provides a probability of a message being spam. Therefore: 50% is "not sure either way", 0% is "not spam", 100% is "definitely spam". -- Randomly Selected Tagline: "lp1 on fire" - Linux kernel error message
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