Abstract: In recent years, many authors have observed that something is happening to the truth, pointing out that, particularly in politics and social communication, there are signs that the idea of truth is losing consideration in media discourse. This is no minor issue: Truth, understood as the criterion for the justification of knowledge, is the essential foundation of enlightened rationality. The aim of this article, based on prior research on social communication (especially as regards journalism), is to elucidate an explanation of this phenomenon, known as ‘post-truth.’ Because it is an epistemological question, the three main variables of the problem (reality, subject and truth) have been analysed by taking into account the manner in which digital social communication is transforming our perception of reality. By way of a conclusion, we propose that (a) the ontological complexity of reality as explained by the news media has accentuated the loss of confidence in journalism as a truth-teller, and that (b) truth is being replaced by sincerity, as an epistemological value, in people’s understanding of the news. The result, using Foucault’s concept of Regime of Truth, suggests a deep change in the global framework of political, economic, social and cultural relations, of which post-truth is a symptom.
Keywords: epistemology; fake news; journalism; ontology; post-truth; reality; social media; truth