 The Marburg conception of genuine philosophy as in the first place a transcendental logic of natural science (cf. Cohen 1902: 445) therefore restricts history to a history of “scientific  idealism”.[34]  In rejecting the view that scientific progress is better understood exclusively from a “systematic” perspective, “detache[d] … from its historical bonds”, (Cohen 1902: 439) Cohen remarks that the “very value and security of science is rooted in its own history, connected, as it were, with the general history of mind [Geist]” (Cohen 1916: 310). This sounds odd since we have heard again and again that science is rooted in its method, but now are told it is rooted in its history. Perhaps the paradox is only seeming, for there is an intimate connection between the Marburg School’s notion of hypothesis as the active posit of mind, on the one hand, and its notion of science as essentially historical, on the other. Their conception of the logic of science as the dynamic Gang of categorial hypotheses implies that science can only be grasped developmentally, i.e., historically.