The determination of species links difference with difference across the successive levels of division, like a transport of difference, a diaphora (difference) of diaphora, until a final difference, that of the infitna species (lowest species), condenses in the chosen direction the entirety of the essence and its continued quality, gathers them under an intuitive concept and grounds them along with the term to be defined, thereby becoming itself something unique and indivisible atomon, adiaphoron, eidos.