Is this just sort of generalized bayesian spam filter? I always thought that if it could learn to label some messages as spam, it would be able to apply any oth

Is this just sort of generalized bayesian spam filter? I always thought that if it could learn to label some messages as spam, it would be able to apply any other label as well. Indeed PG alludes to bayesian text classification being an old an established field (here: http://paulgraham.com/spamfaq.html http://paulgraham.com/spamfaq.html and other posts about spam filtering)