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Note: Scores for "learn" rules, such as BAYES_*, that rate the probability that a message is spam, are scored using the same method. This can produce "confusing" scores, for instance, that have BAYES_80 with a higher score than BAYES_99. There are a few reasons for this. 1) The GA does not understand that BAYES_* are related to one another, they're seperate separate rules that need seperate separate scores. 2) More importantly, the higher the probability from a "learn" rule, the higher likelihood that the message also hit a bunch of other rules. This lets the GA lower the "learn" rule score due to the inevitable false positive, while also still marking the message as spam via the other rule scores.