What the Concept Forgets: Nietzsche, Adorno, and the Problem of Non-Identity
1. The Problem of the Leaf We recognize different leaves as leaves because we overlook what distinguishes one from another. An oak leaf, a maple leaf, and a palm leaf differ in shape, texture, size, colour, and structure, yet the word leaf allows us to treat them as instances of a common kind. Conceptual thought makes this recognition possible by setting aside differences that would otherwise prevent us from grouping individual things together. The operation is so familiar that its selective character easily disappears from view. What happens to the differences that the concept leaves aside? Friedrich Nietzsche addresses this question in “On Truth and Lies in an Extra-Moral Sense” by examining how words and concepts come into being. A word, he argues, does not provide a transparent expression of the thing to which it refers. Its origin already involves a series of transformations: a nerve stimulus is transferred into an image, and the image is then reproduced in a sound. At each...