How do I check if a particular fact exists in the knowledge base and if it does I want to retract it if I dont know the fact-id in advance. I tried using the exists command in a rule but it works only once, that is if there is a fact in the knowledge base then when I the rule will fire for the first time, but if I retract the fact, reassert it and ask to run again then the rule wont fire.
thanks
Richard.
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