Résumé
Peirce’s attitude toward Hegel seems at first sight ambivalent and difficult to justify in a coherent way. On the one hand, Peirce praises Hegel’s concern to show the importance of the three “universal categories,” in particular that of “Thirdness”; on the other hand, he reproaches the author of The Phenomenology of Spirit for reducing the first two categories to the third, but also for yielding to an insidious form of nominalism. The aim of this paper is to clarify the stakes of Peirce’s interpretation of Hegel and to evaluate the relevance of his criticisms, in particular those concerning the ontological status of the possible and of universal categories.