 Also very recently, Alejandro Cassini paid close attention to the nature of scientific models. In particular, he criticizes fictionalism, which conceives models as useful fictions (Cassini 2013), and contends that every scientific model has a target against those who claim that some models do not (Cassini 2018). In turn, Hernán Accorinti (2015a, 2015b) discussed the problem of the autonomy of models with respect to theories, with applications to chemistry; in particular, to atomic and molecular models in quantum chemistry (Accorinti and Martínez González 2016, Accorinti, Fortin, and Martínez González 2018) and to the different models of electronegativity (Accorinti 2019).