Abstract

Truth is one of the main concepts of Philosophy, some even consider it the most important of all (W. Künne). This concept is also a foundation for other philosophical concepts. Some of them even depend intrinsically on it, such as the concepts of belief (to believe in something is to believe this something is true), knowledge (if you know something then that something is true), fact (facts are what make our statements true), existence (true reality is the external world that exists) and modality (there are propositions that can be true in all possible worlds), among many others. Truth is also a crucial concept for other domains. Science is said to be the search for the truth of the Natural World and the good life is said to be the pursuit of the good (Aristotle). If one considers that the good and the just are objects of knowledge (R. Campbell), then, there could be no good or justice without truth, insofar as knowledge needs truth. Also, our confidence in the robustness of western political and social institutions has always rested on truth. Unfortunately, this basis, which is the foundation of trust and, therefore, of the robustness of our institutions, is being eroded by external forces, deniers and nihilists, by undermining the concept of Truth, endangering in that way the democratic model (H. Frankfurt). The troubled events we have recently experienced – the raise of populisms, conspiracy theories, pandemic skepticism, the conflict in Ukraine not only in the battleground but also in the info space – could, to some extent, make us question whether, in fact, there is still any theoretical interest in “truth”. As several authors have noted, it seems that today we live in a society of “post-truth” (A. Szakolczai) or “veritophobia” (A. Goldman), where lies are tolerated and facts ignored. Also, for this reason, understanding what truth is by reflecting on its nature and function, from the most sophisticated conceptual schemes to its most everyday uses, seems to be a philosophical task of the utmost importance. This is why the Revista Portuguesa de Filosofia has decided to dedicate this special issue to the subject of truth.