The text considers points of view of theoreticians of the radical pluralism (democracy): Connolly (William Connolly), Mouffe (Chantal Mouffe) and Tully (James Tully) with regard to the status and the nature of concepts in the political discourse, as well as the consequences of these conceptual presumptions to understanding democracy. The three authors emphasize the essential contestability of political concepts, the paradox of liberal democracy and the need to revise standard rational consensus theories of democracy. Also, the three authors take over the specific interpretation of Vittgenstein to the direction of political theory the centre of which consists of everyday contingent practices of politics as well as dissent about their assess...