<P> Written in French, it became quite popular and was in use up to the twentieth century, introducing the reader to logic, and exhibiting strong Cartesian elements in its metaphysics and epistemology (Arnauld having been one of the main philosophers whose objections were published, with replies, in Descartes' Meditations on First Philosophy). The Port - Royal Logic is sometimes cited as a paradigmatic example of traditional term logic . </P> <P> The philosopher Louis Marin particularly studied it in the 20th century (La Critique du discours, Éditions de Minuit, 1975), while Michel Foucault considered it, in The Order of Things, one of the bases of the classical épistémè . </P> <P> Among the contributions of the Port - Royal Logic is the introduction of a distinction between comprehension and extension, which would later become a more refined distinction between intension and extension . </P>

The art of thinking messrs du port royal