Kenelm Digby's logic of common and natural notions

Abstract In this article, I take a fresh look at the logic of common and natural notions contained in the Two Treatises published in 1644 by Kenelm Digby (1603–1665). Digby's doctrine of common notions was an attempt to retrofit Aristotelianism in order to bring it out of the shadows of scholasticism and into the age of the new experimental and collaborative natural philosophy. To achieve that, he argued that natural philosophy began in the world of experience expressed in common language and was structured according to the basic principles he calls common notions. Taking my point of departure in his correspondence with Hobbes and Mersenne, I explore the Epicurean roots of this theory.