Abstract

In the first part of the article the author explains the importance of Peirce's reflection about the index as a crucial point of the reformulation of his entire philosophical system that took place around 1885. Then he examines the role of the index in Peircean semiotics and linguistics, where the index clearly shows -in spite of the difficulties deriving from Peirce's acceptance of some Kantian gnoseological thesis- the necessary and close connexion between language and reality