Ruth Millikan

A number of clarifications of the target article and some corrections are made. I clarify which concepts the thesis was intended to be about, what “descriptionism” means, the difference between “concepts” and “conceptions,” and why extensions are not determined by conceptions. I clarify the meaning of “substances,” how one knows what inductions to project over them, the connection with “basic level categories,” how it is determined what substance a given substance concept is of, how equivocation in concepts occurs, and the role of language in the conception of substances. Finally, I clarify exactly why I said that concepts of individuals, real kinds, and stuffs have “a common structure,”.

To understand how language works, one must first look to the cooperative functions that various language forms perform, understanding these on a biological model as what these forms accomplish that keeps them in circulation. Next, one should look at language mechanics, at how language forms perform their functions, and especially to the conditions in the world that are necessary to support their specific functions. These are, in part, truth conditions, which are determined by a kind of “meaning” called “semantic mapping functions” — “functions,” this time, in the mathematical sense. Last, the psychological mechanisms that are involved in implementing the functions of various language forms must be described. A proper understanding of these mechanisms eliminates the need to introduce anything akin to intensions or Fregean senses in the understanding of linguistic meaning.

Sainsbury and Tye (2011) propose that, in the case of names and other simple extensional terms, we should substitute for Frege's second level of content—for his senses—a second level of meaning vehicle—words in the language of thought. I agree. They also offer a theory of atomic concept reference—their ‘originalist’ theory—which implies that people knowing the same word have the ‘same concept’. This I reject, arguing for a symmetrical rather than an originalist theory of concept reference, claiming that individual concepts are possessed only by individual people. Concepts are classified rather than identified across different people.

A list of groceries, Professor Anscombe once suggested, might be used as a shopping list, telling what to buy, or it might be used as an inventory list, telling what has been bought (Anscombe 1957). If used as a shopping list, the world is supposed to conform to the representation: if the list does not match what is in the grocery bag, it is what is in the bag that is at fault. But if used as an inventory list, the representation is supposed to conform to the world: if the list does not match what is in the bag, it is the list that is at fault. The first kind of representation, where the world is supposed to conform to the list, can be called "directive"; it represents or directs what is to be done. The second, where the list is supposed to conform to the world, can be called "descriptive"; it represents or describes what is the case. I wish to propose that there exist representations that face both these ways at once. With apologies to Dr. Doolittle, I call them pushmi-pullyu representations or PPRs

When asked to contribute to this lecture series, my first thought was to talk about philosophy of biology, a new and increasingly influential field in philosophy, surely destined to have great impact in the coming years. But when a preliminary schedule for the series was circulated, I noticed that no one was speaking on language. Given the hegemony of philosophy of language at mid-century, after ‘the linguistic turn’, this seemed to require comment. How did philosophy of language achieve such status at mid-century, and why is it losing it now? Has the Anglo-American tradition really begun to put the philosophy of language in better perspective? I hope so. Indeed, I will end with suggestions for how to keep it more securely in its proper place.

Written by one of today's most creative and innovative philosophers, Ruth Garrett Millikan, this book examines basic empirical concepts; how they are acquired, how they function, and how they have been misrepresented in the traditional philosophical literature. Millikan places cognitive psychology in an evolutionary context where human cognition is assumed to be an outgrowth of primitive forms of mentality, and assumed to have 'functions' in the biological sense. Of particular interest are her discussions of the nature of abilities as different from dispositions, her detailed analysis of the psychological act of reidentifying substances, and her critique of the language of thought for mental representation. In a radical departure from current philosophical and psychological theories of concepts, this book provides the first in-depth discussion on the psychological act of reidentification.

At the start of Convention (1969) Lewis says that it is "a platitude that language is ruled by convention" and that he proposes to give us "an analysis of convention in its full generality, including tacit convention not created by agreement." Almost no clause, however, of Lewis's analysis has withstood the barrage of counter examples over the years,1 and a glance at the big dictionary suggests why, for there are a dozen different senses listed there. Left unfettered, convention wanders freely from conventional wisdom through conventional medicine, conventions of art and "conventions of morality" to conventions of bidding in bridge.2 Surely it is unwise to try to fell these all with a single stone. Lewis's original goal, however, pursued further in (Lewis 1975), was to describe the conventionality of language, and this may be a more reasonable target

Concepts are highly theoretical entities. One cannot study them empirically without committing oneself to substantial preliminary assumptions. Among the competing theories of concepts and categorization developed by psychologists in the last thirty years, the implicit theoretical assumption that what falls under a concept is determined by description () has never been seriously challenged. I present a nondescriptionist theory of our most basic concepts, which include (1) stuffs (gold, milk), (2) real kinds (cat, chair), and (3) individuals (Mama, Bill Clinton, the Empire State Building). On the basis of something important that all three have in common, our earliest and most basic concepts of substances are identical in structure. The membership of the category like that of is a natural unit in nature, to which the concept does something like pointing, and continues to point despite large changes in the properties the thinker represents the unit as having. For example, large changes can occur in the way a child identifies cats and the things it is willing to call without affecting the extension of its word The difficulty is to cash in the metaphor of in this context. Having substance concepts need not depend on knowing words, but language interacts with substance concepts, completely transforming the conceptual repertoire. I will discuss how public language plays a crucial role in both the acquisition of substance concepts and their completed structure