 Running through much historical epistemology is a century-long line of neo-Kantian thinking, from Ernst Cassirer and the Marburg school to Reichenbach and Carnap and then to Kuhn, Ian Hacking, Michael Friedman, Daston, Renn, and others. Theirs are diverse versions of the two-process view introduced in  Section 1.2 above. On this view, there are long-term socio-cognitive stabilities (not necessarily the paradigms or research programs discussed above) that have a beginning, middle, and end in historical time. They are historicized Archimedean points or platforms that organize human experience, rather than fixed Kantian categories. But, like Kant’s categories, they are presuppositions that define how coherent perception and the formation of true or false propositions are possible.