The type of evidence that uses the viewpoint of someone with authority is called expert testimony. Expert testimony is when an individual with specialized knowledge or experience in a particular field provides their opinion or analysis on a given topic. This opinion is considered valuable and credible due to the person's expertise, qualifications, and authority in the specific subject matter. Expert testimony is often utilized in legal cases, academic research, and professional consultations, where the opinion of an expert adds weight and validity to the argument or claim being made.
