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<p>knowledge-based systems have two defining components: an attempt to represent knowledge explicitly, called a <a href="page.php?w=knowledge_base">knowledge base</a>, and a <a href="page.php?w=reasoning_system">reasoning system</a> that allows them to derive new knowledge, known as an <a href="page.php?w=inference_engine">inference engine</a>.</p>

<p><big>Components</big></p>
<p>The knowledge base contains domain-specific facts and rules  about a problem domain (rather than knowledge implicitly embedded in procedural code, as in a conventional computer</p><p>
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