The term 'single-minded expert' can be summarized as a person who is highly knowledgeable and focused on a particular subject. This type of expert is often referred to as a 'NERD, ' which is a four-letter word. A single-minded expert is someone who has an intense interest in a specific topic, and they are usually very knowledgeable about it. They may spend a lot of time researching and studying the subject, and they often have a deep understanding of it. They are also usually very passionate about their chosen field, and they may be willing to go to great lengths to learn more about it.