The subject field of this research is the combination of cultural phenomena, which correlate with the initially highlighted concept of “post-truth” through generalization of its criteria. The traditionally narrow understanding of post-truth is associated with news reports of mass media. However, the distortion of actual picture, using the techniques of heuristic rhetoric and mechanisms that instigate cognitive biases is a more common situation in modern society, which unites various communication phenomena, touches upon news and everyday communication, artistic endeavor, and many other areas. The specific subject of research is the range of possible scenarios of social development depending on its response to proliferation of the phenomena that comprise the cultural-communication complex of “post-truth”. This article is the first attempt of scientific summary of the phenomenal picture of post-truth based on the competent expansion of the criteria from the partial instances to the general mechanisms. Partial criteria, such as neglecting objective factors in the report, appeal to human values and ideologies, use of emotional pressure for substantiating own opinion, the author replaces with the general: media distortion of reality as a goal of report, use of cognitive biases, use of mechanisms of heuristics. Based on the highlighted criteria, the author analyzes the question of semantic and cultural correlation with post-truth of such as the phenomena as the fan theories of two types, litbaits, pop science, folk history, astroturfing, fan fakes, clickbaits, narrative journalism, etc. Scientific novelty also consists in outlining the possible scenarios for social development and its communication environment depending on the strategies of response to expansion of the sphere of post-truth.