 Endicott as well as Dizadji Bahmani et al. (2010) argue that the sole difference between the classical Nagel-model and New Wave reduction is that New Wave reductionists highlight the procedural aspect of how reductions are carried out—or of how scientists may argue that reduction-relations are instantiated, whereas Nagel was mostly concerned with questions regarding the relation that is so discovered. How scientists may arrive the truth of bridge-principles is a question different from the question as to the nature of bridge-principles.