Ernie LePore

1 There is a Standard Objection to the idea that concepts might be prototypes (or exemplars, or stereotypes): Because they are productive, concepts must be compositional. Prototypes aren't compositional, so concepts can't be prototypes (see, e.g., Margolis, 1994).2 However, two recent papers (Osherson and Smith, 1988; Kamp and Partee, 1995) reconsider this consensus. They suggest that, although the Standard Objection is probably right in the long run, the cases where prototypes fail to exhibit compositionality are relatively exotic and involve phenomena which any account of compositionality is likely to find hard to deal with; for example, the effects of quantifiers, indexicals, contextual constraints, etc. KP are even prepared to indulge a guarded optimism: "... when a suitably rich compositional theory... is developed, prototypes will be seen ... as one property among many which only when taken altogether can support a compositional theory of combination" (p.56). In this paper, we argue that the Standard Objection to prototype theory was right after all: The problems about compositionality are insuperable in even the most trivial sorts of examples; it is therefore as near to certain as anything in cognitive science ever gets that the structure of concepts is not statistical. Theories of categorization, concept acquisition, lexical meaning and the like, which assume the contrary simply don't work. We commence with a general discussion of the constraints that an account of concepts must meet if their compositionality is to explain their productivity. We'll then turn to a criticism of proposals that OS2 and KP make for coping with some specific cases.

The idea that quotidian, middle-level concepts typically have internal structure-definitional, statistical, or whatever—plays a central role in practically every current approach to cognition. Correspondingly, the idea that words that express quotidian, middle-level concepts have complex representations "at the semantic level" is recurrent in linguistics; it is the defining thesis of what is often called "lexical semantics," and it unites the generative and interpretive traditions of grammatical analysis. Hale and Keyser (HK) (1993) have endorsed a version of lexical decomposition according to which "denominal" verbs are typically derived from phrases containing the corresponding nouns: ‘singvtr’ is supposed to come from something like DO A SONG; ‘saddlevtr’ is supposed to come from something like PUT A SADDLE ON; ‘shelvevtr’ is supposed to come from something like PUT ON A SHELF; and so forth.1 Their case for these claims revives a form of argument, the "impossible-word" argument, which has for some time been in eclipse. In this article we will claim that, whatever the right account of lexical decomposition eventually turns out to be, impossible-word arguments are infirm and should be discounted. We will use HK's paper as a text for this critique.

The main question addressed in this book is whether individuation of the contents of thoughts and linguistic expressions is inherently holistic. The authors consider arguments that are alleged to show that the meaning of a scientific hypothesis depends on the entire theory that entails it, or that the content of a concept depends on the entire belief system of which it is part. If these arguments are sound then it would follow that the meanings of words, sentences, hypotheses, predictions, discourses, dialogs, texts, thoughts and the like are merely derivative. The implications of holism about meaning for other philosophical issues (intentional explanation, translation, Realism, skepticism, etc.) will also be explored. Authors discussed include Quine, Davidson, Lewis, Bennett, Block, Field, Churchland, and others. The book is intended for all those interested in language, mind, metaphysics or epistemology.