An object of the present invention is to provide a knowledge base system which can build a computer system for executing the knowledge base without considering execution sequence of the knowledge base, and can execute the knowledge base in a correct sequence for the relationship among {HEAD ~ items} of {TAIL ~ the knowledge base} 
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An object of the present invention is to provide a knowledge base system which can build a computer system for executing the knowledge base without considering execution sequence of the knowledge base , and can execute the knowledge base in a correct sequence for the relationship among { HEAD ~ items } of { TAIL ~ the knowledge base }
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