HERMANN VON HELMHOLTZ, EWALD HERING AND COLOR VISION: A CONTROVERSY OVER STYLES OF REASONING?

During the second half of 19th century, in field physiological optics, there was a strong controversy between Hermann von Helmholtz and Ewald Hering. This has been usually characterized as “empiricism” vs. “nativism”. In physiology visual perception, several subjects demanded attention, among them, color vision. Hering suggested different theories for correlate sensation spaces to give an account relationships colors. this article, I will argue that two authors could be understood differences styles reasoning, these express presuppositions. More specifically, want suggest disagreements linked discussions on how vital phenomena should studied.