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An expert is someone widely recognized as a reliable source of knowledge or skill whose judgement is accorded authority and status by the public or their peers. Experts have prolonged or intense experience, practice or education in a particular field that goes significantly beyond any general or shallow appreciation. The concept is debated within the field of epistemology under the general heading of expert knowledge .

In the field of medicine, a movement called " evidence-based medicine" ranks quantitative empirical analysis, such as double blind randomized controlled trials, above the judgements of experts (i.e. medical professionals).

The term is widely used informally, with people being described as 'experts' in order to bolster the relative value of their opinion, when no objective criteria for their 'experthood' is available. The term crank is likewise used to disparage opinions. Academic elitism arises when 'experts' become convinced that only they understand their field of study.

It is not necessary for an individual to have a professional or academic qualification for them to be accepted as an expert. In this respect, a shepherd with 50 years of experience tending flocks would be widely recognized as having complete expertise in the use and training of sheep dogs and the care of sheep.

See also: Expert system, Expert witness.

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Topics: Expert Witness, Expert System, Expertise, Expertization...

ExpertAn expert is someone widely recognized as a reliable source of knowledge or skill whose judgement is accorded authority and status by the public or their peers. Experts have prolonged or intense experience, practice or education in a particular field that	Expert witnessAn expert witness is a witness, who by virtue of education, or profession, or experience, is believed to have special knowledge of his subject beyond that of the average person, sufficient that others may officially (and legally) rely his opinion. Typical	Expert systemAn expert system is a class of computer programs developed by researchers in artificial intelligence during the 1970s and applied commercially throughout the 1980s. In essence, they are programs made up of a set of rules that analyze information (usually
ExpertiseExpertise is the property of a person (that is, expert) or of a system which delivers a desired result such as rapid, pertinent information. It generally implies large amounts of knowledge, and very good information processing speed ( fluency). Expertise	ExpertizationExpertization is the process of authentication of an object, usually of a sort that is collected, by an individual expert or a committee of experts. The expert committee will examine the collectable and issue a certificate typeically including: # A statem	Expert determinationExpert determination is a historically accepted form of dispute resolution invoked when there isn't a formulated dispute in which the parties have defined positions that need to be subjected to arbitration, but rather both parties are in agreement that th
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