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Expert Systems (Three Main components (Knowledge base, Interference engine…
Expert Systems
Introduction
An expert system allows a user to input a query  into an ICT system and then through a series of input steps narrow down the query until the computer outputs some advice.
Inference Engine
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Functions
Pass information to to user interface asking the user for further information about the problem. This information is then used to narrow down the issue.
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User Interface
Depending on the system the user interface might involve a touch screen, keyboard or even just a simple keypad ( for example car diagnostic systems)
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The knowledge base with the expert information contained within it.
The rules base that is used by the inference engine to determine which knowledge should be used.
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