The price of scientific discovery in Semiotics ?The members of this Congress who have lived through the beginnings of Semiotic research and who have deepened thoroughly their reading of the founding texts (Saussure, Hjelmslev, Peirce et al.) that initiate the construction of a Semiotic science, carry into effect studies driven by a rigorous hierarchisation of operative concepts matched by a strictly defined metalanguage; their scientific work is the opposite of an immutable idealism; for the first time in History the evolutive permanence of hard sciences has spread to the theories of signification.Younger semioticians ((belonging to Generation Z) as well as their mentors publish studies that appear forgetful of standard Semiotics unhampered by an epistemology that, according to them, is not adapted to the new state of the world. Their contributions willingly ignore notions inspired by the history of sciences that had currency in the last century. They deal with more “practical” notions in step with (the) new forms of expression and communication prescribed more particularly by the developments of Artificial Intelligence. Diagrams, generative AI, Big Data,etc, became more pregnant than the objects of signification analysed by the reasoned and analytical epistemology of last century.However the references to the first Semiotics (especially Saussure and Hjemlslev) persist and the demonstrations by Greimas operating an algebraization of meaning, have really created an emulation towards a rigorous work that places the history of Semiotics in long-term historical structures, just as it is the case with the history of mathematics or physics.(A.H.)