1 Biophysics Unit (CSIC, UPV/EHU) , University of the Basque Country , Spain . Email: kepa.ruiz-mirazo@ehu.eus.
2 Institut des Biomolécules Max Mousseron (IBMM, UMR 5247, CNRS/Université de Montpellier/ENSCM) , Montpellier , France . Email: robert.pascal@umontpellier.fr.
3 Department of Biochemistry and Molecular Biology , University of the Basque Country , Spain.
4 Department of Logic and Philosophy of Science , University of the Basque Country , Spain.