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Theoretical approaches to the definition of lies in the context of a special psychophysiological study using a polygraph of candidates for service in the internal affairs bodies of the Russian Federation

The article examines the concept of lying from the standpoint of researchers in various fields of science. This interest of scientists is due to the need for a comprehensive understanding of the essence of the phenomenon of lies for its effective diagnosis. 
Despite numerous approaches to the study of this phenomenon, in our opinion, its formulation, types, signs, internal and external evaluation criteria require special attention for a better diagnosis when conducting a special psychophysiological study using a polygraph as part of the selection of candidates for service in the internal affairs bodies of the Russian Federation. In this regard, there is a need to analyze this concept in the scientific literature to form and concretize the definition of a lie, which will undoubtedly lead to a more professional and effective approach to its recognition. 
In this work, a differential diagnosis of the definitions of lies is carried out, the author’s concept of the phenomenon under study is formulated, aspects of false interaction are identified that must be taken into account in the process of conducting a special psychophysiological study using a polygraph when selecting candidates for service in the internal affairs bodies of the Russian Federation.