An expert is someone who has extensive knowledge in their field. They obtain knowledge through various means such as research, experience and observation in a particular area of ​​study or a specific phenomenon. Their knowledge of a certain field is specific and exceeds the knowledge of an average person, and this allows others to rely on their opinion. These experts normally express their opinion in the form of writing so that it can be easily conveyed and disseminated to the masses. People can get their opinion by reading the document or listening to their speeches or talking to them in discussions or brain storming sessions. Curiosity has always been the nature of humanity. Since ancient times, people have always had many questions to ask. Acquiring the most adequate, correct and precise answers to the questions requires adequate and precise knowledge. This knowledge must be sought. Therefore, the pursuit of knowledge has become part and parcel of human nature. Human behavior requires an explanation for every phenomenon and behavior that occurs. In the process of seeking knowledge, you need to make sure that the source of knowledge comes from a reliable and trustworthy source. This is to ensure its reliability and reliability. During the Paleolithic, even today in underdeveloped nations, the population always depends on their leaders for information. The community believes and accepts the tribal leaders or the village chief as the main source of reliable knowledge. Leaders' opinions are sacred and the most powerful and meaningful opinion for decision making and problem solving. Expert opinion is still an important source of knowledge. However, the nature of appointing an expert opi...... half of article ......ker, PF (2003). The new realities. Edison, NJ: Transaction Publishers.Frederic PM, Agnes, F.V., John, M. (eds.) (2010). Hawthorn effect. Aphascript Pub.: MauritusTopic on human cloning. http://www.echat.com/essay.php?t=26332. Accessed January 30, 2011 Kerlinger, F. N. (1986). Foundations of behavioral research. 3rd ed. Holt, Rinehart, and Winston: New YorkNonaka, I. (1994). A dynamic theory of organizational knowledge creation. Organizational science. 5(1). 14–37.Roscoe, J. T. (1975). Fundamental research statistics for the behavioral sciences. 2nd ed. Holt, Rinehart and Winston: Fort Worth Shafikkullah Hj Shafiee. (2006). Library initiatives in information literacy programs towards creating a knowledge society in Malaysia. Paper presented at the International Conference on Information Literacy, Kuala Lumpur, 14-15 June 2006