What is an Expert System?
An expert system is computer software that attempts to act like a human expert on a particular subject area.
Expert systems are often used to advise non-experts in situations where a human expert in unavailable (for example it may be too expensive to employ a human expert, or it might be a difficult to reach location).
How Do Expert Systems Work?
An expert system is made up of three parts:
A user interface - This is the system that allows a non-expert user to query (question) the expert system, and to receive advice. T|bn\Uerface is designed to be a simple to use as possible.
A knowledge base - This is a collection of facts and rules. The knowledge base is created from information provided by human experts
An inference engine - This acts rather like a search engine, examining the knowledge base for information that matches the user's query.
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