Jorge Canestri: MD, psychiatrist, psychoanalyst. Specialized in linguistics and epistemology. Training and supervising analyst for the Italian Psychoanalytical Association (AIPsi) and for the Argentine Psychoanalytic Association. Director of the Institute of Psychoanalysis of the Italian Psychoanalytical Association (1992–98). Full member of the International Psychoanalytic Association. Chair of the Ethics Committee (IPA), Chair of the Working Party on Theoretical Issues of the EPF, Chair of the 42nd Congress of the International Psychoanalytic Association (IPA), Nice, 2001. Member of the Conceptual and Empirical Research Committee (IPA). Professor of Psychology of Mental Health at the Roma 3 University. Editor of the Educational Section of the International Journal of Psycho-Analysis. Member of the Editorial Board of the International Journal of Psycho-Analysis. Correspondent of Psicoanálisis and of Revista de Psicoanálisis. Member of the Editorial Board of Aperturas Psicoanalíticas. Author of numerous psychoanalytical papers in books and reviews and co-author of The Babel of the Unconscious: Mother Tongue and Foreign Languages in the Psychoanalytic Dimension. Editor (with Marianne Leuzinger-Bohleber and Anna Ursula Dreher) of Pluralism and Unity? Methods of Research in Psychoanalysis. Director of the webpage: Psychoanalysis and logical mathematical thought. Mary S. Sigourney Award recipient, 2004. IPA Global Representative for Europe.