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Thanks Wolfgang,
The no-loop attribute fixed my crazy looping problem and your answer
on knowing EVERYTHING the rule might ever have to do is a good
answer. I guess there will be a certain amount of trust I have to
place in the users. In the meantime, are there any books on drools
you reccomend (other than the manual)?

The standard (or only?) answer to this is: Michal Bali's book, see
https://www.packtpub.com/drools-jboss-rules-5-0-developers-guide/book

If you are new to Rules and Rule Based Systems, you might also profit from more general literature on RBS, even when a text is not direclty related to Drools.

-W