Expert Systems

• Expert Systems are often called rule based systems. Alternately, they also refer to both rule based and case based systems.
• Rule based systems are made up mainly of a collection of rules.
• Rules are if then else statements
• So that the system works in different cases, it also has working memory (WM).
• WM is input by the user, the rules inspect it, and may modify it.
• The rule based system itself looks at the WM, and selects rules to apply that are legitimised by the WM.
• If (X bears live young) and (X gives milk) then (X is a mammal)
• Why is this useful?
• How is it different than writing (e.g.) Java code?