The ArgumentThe secret of invention or the art of inventing has recently become the object of positive or experimental research, aimed at discovering the logic of the initial mental processes that lead to “innovation.” But the problem is old and goes back to antiquity: The art of memory, rhetoric, symbolics. Does the succession of thought in invention follow a rule, such that its variations could be classified? Here I offer but a general direction: There is an analogy between the two (...) relations: invention/innovation and fecundation/maturation – namely, a male and a female principle.The Ancients thought that inventing was a divine art and that man receives the spark to then brood over its fruit in his mind. Today's still dominant materialist tendency insists on the importance of this secondary maturation and minimizes the role of the primordial spark.Thus becomes possible the ranking according to a unique order — but not without hesitations and guilt — of thinkers as far apart as Mandeville, Adam Smith, Hegel, Buffon, Rousseau, and Herder, to find the contemporary trend to which François Dagognet belongs. (shrink)

For the past twenty years, taxonomy has been in a state of turmoil. This confusion brings along with it four distinct schools of thought, each of which offers a different concept of biological species. The thesis will show that these concepts are purely operational and have only a weak theoretical force. In turn, it will be argued that a sound definition of species uses the notion of natural kinds, which is itself defined in term of non-causal nomological regularities.