6.3 · Lesson 2 of 3
Expert systems
Syllabus 6.3.3
What this lesson covers
- Describe expert systems and machine learning
Key vocabulary
- Explanation system
- Shows the user how the expert system reached its conclusion.
- Expert system
- An AI program that imitates a human expert in one area, using a knowledge base and rules.
- Knowledge base
- The store of facts in an expert system.
- Rule base
- The set of IF-THEN rules an expert system uses to reason with the facts.
- Inference engine
- Applies the rules to the facts to reach a conclusion.
- Interface
- How the user communicates with the expert system.
- Forward chaining
- Reasoning from the facts towards a conclusion.
- Backward chaining
- Reasoning from a goal back to the facts needed to support it.
Check your learning
- Quick check: 4 questions
- Key vocabulary test: 8 terms
- Activity 1: Parts and chaining · 8 questions
- Activity 2: Order the steps · drag and drop
- Activity 3: Expert systems quiz · 8 questions