 Another former student of Alchourrón to be mentioned is the Argentinian Eduardo Fermé (b. 1964), who was also a member of Alchourrón’s group when it became interdisciplinary. Currently a professor at the Universidad de Madeira (Portugal), he obtained his B.A. and Ph.D. in computer science at UBA, and his Ph.D. in philosophy at the Royal Institute of Technology (Sweden). Fermé’s research has focused mainly on theory contraction and on epistemic entrenchment, extending or modifying in several of his publications the AGM theory (Fermé 1998, 2000, 2001; Fermé &amp; Hansson 1999; Fermé &amp; Reis 2013).