Newton’s Regulae philosophandi—the rules for reasoning in natural philosophy—are maxims of causal reasoning and induction. This essay reviews their significance for Newton’s method of inquiry, as well as their application to particular propositions within the Principia. Two main claims emerge. First, the rules are not only interrelated, they defend various facets of the same core idea: that nature is simple and orderly by divine decree, and that, consequently, human beings can be justified in inferring universal causes from limited phenomena, if (...) only fallibly. Second, the rules make substantive ontological assumptions on which Newton’s argument in the Principia relies. (shrink)

I suggest that it is fruitful to read Hume's Enquiry concerning Human Understanding as a concise exposition of an epistemic ideal whose complex philosophical background is laid down in A Treatise of Human Nature. Accordingly, the Treatise offers a theory of cognitive and affective capacities, which serves in the Enquiry as the foundation for a critique of chimerical epistemic ideals, and the development of an alternative ideal. Taking the "mental geography" of the Treatise as his starting point, this is the (...) project Hume pursues in the Enquiry. The epistemic ideal Hume spells out in the Enquiry is an alternative to competing ideals: the Aristotelian, the Cartesian, and the Newtonian, and can be read as an exposition of the epistemic ideal of modern science. Although the spell of the Aristotelian and the Cartesian ideals had been in decline for several decades by the 1740s, they had not fully lost their grip on the philosophical imagination. Yet, it was the Newtonian epistemic ideal that became dominant in Scotland and Britain by then, guiding inquiry in moral and natural philosophy, as well as in medical theory. Hume offers a critique of these ideals. He shows that Aristotelian and Cartesian epistemic aspirations rest on mistaken views on human cognitive capacities. And albeit the Newtonian ideal is not prone to this mistake by Hume's standards, its epistemic expectations extend far beyond the limits of those capacities. Hume's epistemic ideal can be read as a correction, limitation and refinement of the Newtonian ideal: it sets epistemic aims and propagates methods for the production of fallible, limited and potentially useful knowledge that falls short of the great epistemic expectations of Newton and many Newtonians - but it conforms to what we expect from modern science. (shrink)

This article argues that early modern philosophy should be seen as an integrated enterprise of moral and natural philosophy. Consequently, early modern moral and natural philosophy should be taught as intellectual enterprises that developed hand in hand. Further, the article argues that the unity of these two fields can be best introduced through methodological ideas. It illustrates these theses through a case study on Scottish Newtonianism, starting with visions concerning the unity of philosophy and then turning to a discussion of (...) how methodological ideas figure in those visions. Finally, the article argues that methodological considerations can serve as good starting points to introduce and discuss central topics and canonical figures of the early modern period. (shrink)