Ricardo Santos received his PhD in Philosophy from the New University of Lisbon in 2002, and then stayed there as postdoctoral fellow of the Institute for the Philosophy of Language (2002-2005). After that, he took a position as Assistant Professor at the University of Évora (2005-2015). In that period, he was President of the Portuguese Philosophical Society (2006-2013). In 2015 he moved to the University of Lisbon, where he currently is Full Professor in the Department of Philosophy of the Faculty of Letters. He received the title of Agregado in 2021. He works mainly in the areas of Metaphysics and Philosophy of Logic, with some incursions in Ancient Philosophy. He has done work on truth, vagueness, future contingents, time and modality. He is interested in the development of non-classical logics. He wrote a monograph titled A Verdade de um Ponto de Vista Lógico-Semântico [Truth from a logico-semantic point of view] (Lisboa: Fundação Calouste Gulbenkian, 2003). He translated into Portuguese (and wrote an introduction to) Saul Kripke's Naming and Necessity (Lisboa: Edições Gradiva, 2012, with Teresa Filipe). He translated (and wrote extended notes and introductions to) Aristotle's Categories and De Interpretatione (Lisboa: Imprensa Nacional-Casa da Moeda, 2016). He co-edited the volume New Essays on Aristotle's Organon (Routledge, 2023), for which he also wrote the introduction (with A.P. Mesquita) and one chapter. He was the leader of a collaborative research project on (deductive, inductive and decision-theoretic) paradoxes (2008-2011, funded by the Portuguese Foundation for Science and Technology). Presently, he is co-editor of the analytic philosophy journal Disputatio (ranked Q1 by Scimago) and of the Compêndio em Linha de Problemas de Filosofia Analítica [Online companion to problems in analytic philosophy]. He is Director of the Centre of Philosophy of the University of Lisbon and Coordinator of the LanCog research group.