expert system

expert,

n a person who has special skill or knowledge in a particular subject, such as a science or art, whether acquired by experience or study; a specialist.

expert system,

n a computer program that follows a logical pathway or algorithm to a conclusion in a manner that mimics what an expert in the field would follow.

expert testimony,

n the sworn statements of a person with special knowledge about a subject under consideration by a court of law.

expert witness,

n a person who has special knowledge of a subject about which a court requests testimony to educate the court and the jury in the subject under consideration.

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expert system

Informatics A topic-specific software program designed to imitate human decision-making using detailed knowledge of a particular subject and rules for applying facts to a scenario; an AI application designed to assist in a particular decision-making process; the key component of an ESS is a knowledge base, which combines a database of facts, beliefs, and an algorithm based on heuristic logic–eg, expert systems of internal medicine, CADUCEUS, ILIAD, INTERNIST. See Artificial intelligence, Computer-based diagnostic system, Neural networking.