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  1. sunrain

    Check existance of procedures/facts

    After searching a little, I found that using the dynamic directive solves my problem. Mihai
  2. sunrain

    Check existance of procedures/facts

    Hello, I have a set of facts (a(c1), b(c2), ...) in my knowledge base that might not always be there. My set of rules 'assume' that all facts exist. If one of the facts does not exist (i.e. b(c2) is missing), when I run my program I get an error saying that I have an "Undefined procedure: b/1"...

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