Lucian Petrescu


Ghent University

Descartes’s Reappraisal of Aristotelian Demonstrative Science

The combination of the two forms of demonstration defined by Aristotle, demonstratio quia and demonstratio propter quid (apodeixis tou dioti and apodeixis tou hoti) is one of the most enduring ideas elaborated on by medieval philosophers. The idea that these two forms of demonstration are both valid and need to be combined with each other in scientific proofs is not to be found in either Aristotle or in the early Greek commentators.