Abstract: I defend the historical definition of “function” originally given in my Language, Thought and Other Biological Categories (1984a). The definition was not offered in the spirit of conceptual analysis but is more akin to a theoretical definition of “function”. A major theme is that nonhistorical analyses of “function” fail to deal adequately with items that are not capable of performing their functions.
Comment: This paper is something of a classic, and would be useful in a course on philosophy of science, philosophy of biology, philosophy of mind or philosophy of language. Though the paper is not technical, it is not easy and would be most suitable for advanced undergraduate or graduate courses. The paper also functions as a good example of an important attempt to naturalise a central normative notion.