Which of the following is not a component of an expert system?

✅Explanation: An expert system is a computer program that emulates the decision-making ability of a human expert. The essential components of an expert system are a knowledge base (domain-specific information), an inference engine (rules for applying knowledge), and a user interface (for interaction with users). While human professionals may have been involved in creating the knowledge base, they are not a component of the functioning expert system itself.