L’ambiguità dell’«ontologia fondamentale» (Fundamentalontologie) di Martin Heidegger

This paper examines the theoretical ambiguity of Martin Heidegger’s “fundamental ontology” (Fundamentalontologie) as outlined in "Sein und Zeit". First, it sheds light on Heidegger’s conception of philosophy in the lectures that preceded the 1927 work. Second, it turns to Sein und Zeit and clarifies the connection between the "Seinsfrage" and the fundamental ontology. Third, it critically examines the intricate relationship between the fundamental ontology, the “existential analytic” (existenziale Analytik), and the sciences, investigating how these elements are connected within Heidegger’s framework. Finally, it highlights the unresolved theoretical tension that permeates the fundamental ontology and questions its problematic foundational role, offering further interpretative pathways.