As a matter of fact, science is always accompanied by its shadow, pseudoscience. The latter is a collective name for all kinds of concepts and activities that, for various purposes, disguise as science. However, there are hardly any clear formal criteria enabling one to demarcate between science and pseudoscience.

Alexander G. Sergeev is a member of the RAS Commission on the Fight against Pseudoscience and Falsification of Scientific Research, algen@yandex.ru
The paper is based on a report made as part of the forum “Media in the Modern World. 54th Petersburg Readings” held in St. Petersburg on April 23, 2015.