How expert system work?

Expert systems are computer programs that simulate the decision-making ability of a human expert in a specific domain. They rely on a knowledge base, which contains rules and facts about the subject, and an inference engine that applies logical reasoning to solve problems or provide recommendations. Users interact with the system through a user interface, and the system analyzes input data to generate conclusions or advice based on its stored knowledge. By employing techniques like rule-based reasoning, expert systems can provide consistent and reliable solutions to complex issues.