“Is a statement fact or fiction, original or copy? Who is an agent and who is a patient? Is such behavior spontaneous or manipulated, public or private? Is this person’s intention authentic or spurious? Who can I trust?” In a world where the internet has become massively disseminated, becoming the main arena for political communication in several countries, these questions we ask on a daily basis are signs of the rise of processes such as populism, post-truth, denialism and conspiracism. In O Mundo do Avesso: Verdade e Política na Era Digital (The Inside Out World: Truth and Politics in the Digital Era), anthropologist Letícia Cesarino offers an innovative perspective to read these phenomena, commonly explained by political, economic or situational causes. She proposes a ‘four fields’ approach to online anti-structural publics, based on a new reading of Gregory Bateson’s cybernetics , which allows us to see these processes in their technical dimension, as a system that works through dynamics of stabilization, crises, inversions, polarizations and new reorganizations, demonstrating the complexity behind the recent digitalization of politics and truth.