Research into the impact of information and communication technologies (ICT) on the field of public communication has a big importance nowadays. This article is aimed at studying the influence of lay epistemics on the formation of judgments in the course of communication on digital platforms between government officials and the citizens. To study the functioning of the process of forming judgments on digital platforms of communication between the authorities and citizens, we have worked out a new methodology of discourse analysis based on theory of lay epistemics. We stem on communication on the 'Our St. Petersburg' platform. The descriptive and regression analysis of judgements with the aid of the programming language R allows us to reveal that this platform is belonged to informative type of communication based on the behavioral principle of "stimulus-response". It was also found that the criteria of the parametric model have a different effect on the formation of a certain type of judgment in the framework of public communication on digital platforms.