1 UNESCO, Bioethics Programme, Cluster Office to Central America, San José, Costa Rica; Laboratoire Logiques de l'agir, Philosophy Department, University of Franche compté, Besançon, France. Electronic address: d.cardenas@unesco.org.
2 Laboratoire Logiques de l'agir, Philosophy Department, University of Franch compté, 1 rue Goudimel, 25030 Besançon cedex, France. Electronic address: cpelluchon@yahoo.fr.