 A friend and a protégé of Bossuet who admired Descartes too, Géraud de Cordemoy was appointed "lecteur" (tutor) to the Dauphin (son of King Louis XIV), at the same time as Fléchier.He was elected a member of Académie française in 1675.Cordemoy is known primarily for having rethought the Cartesian theory of causality, introducing the notion of "occasional cause" within a system of thought which remains essentially Cartesian.