Claudine Tiercelin is a Fench philosopher. She is a researche at the Institut Jean-Nicod of Paris, senior member of the Institut universitaire de France. She also teaches medieval and contemporary philosophy in many unviersities, in France (Rouen, Paris 1, Tours, Paris 12), and United States (Fordham University of New York). Among her main publications:La Pensée-signe (Éd. Jacqueline Chambon, 1993), Peirce et le pragmatisme (PUF, 1993), Hilary Putnam, l’héritage pragmatiste (PUF, 2002), Le doute en question : Parades pragmatistes au défi sceptique (Éditions de l’Éclat, 2005).