 Furthermore, according to the Marburg conception of objectivity and objecthood, objecthood—what it is to be an object—is conceptually dependent on objectivity, which is explained in terms of laws. The upshot of this is that our notion of a physical object is determined by the most fundamental laws of our science. Marburg Neo-Kantianism therefore highlights the fact that scientific progress requires fundamental shifts in science’s ontology—its conception of what there is.