The French see René Descartes, a 17th century philosopher, scientist, and mathematician, as the truest expression of their national mind. I am afraid they are right.Descartes rejected authority in intellectual life and insisted on reconstructing knowledge on plain sense and strict reasoning, hence his famous motto, cogito ergo sum (“I think and therefore I am”). However, he also disdained experience as long as it could not be boiled down into logical and mathematical terms. This approach, so much at odds with the empirical and pragmatic approach favored in the Anglo-Saxon world, is indeed a hallmark of French culture -- including...