Online research in philosophy

1. In the course of his philosophical development, Jerry Fodor has indicated two sorts of non-broad (i.e., non-truthconditional) content of mental representations, namely content of mental state types opaquely taxonomized (de dicto content: DDC) and narrow content (NC) qua mapping function from contexts (of thought) to broad contents. According to the former conceptualization, mental state tokens which are truth-conditionally identical may be such that they cannot both truthfully ascribed to one and the same subject at the same time, for they differ in their respective DDC. In Fodor's own example, Oedipus' thoughts that he will marry Jocasta and that he will marry Mum are truth-conditionally identical, but different as far their DDC is concerned; one cannot indeed truthfully ascribe both thoughts to him simultaneously1. According to the latter conceptualization instead, mental state tokens of molecularly identical twins placed in different environments (such as Earth and Twin-Earth) are such that, although they differ in their truth-conditions, they share the same NC2. For instance, these twins respectively think that water quenches thirst and that twater (a liquid similar to water but its chemical composition) quenches thirst. Although these thoughts thus differ in broad content, they have the same NC: had the Twin-Earthling twin been brought up on Earth rather than on Twin-Earth where he actually lives, he would have thought that water quenches thirst rather than that twater quenches thirst3. According to Fodor's picture, both concepts are invoked for the purpose of psychology in order to account for one and the same thing, namely subjects' behavior. On the one hand, difference in behavior of a subject whose thought-tokens have the same truth-conditions may be ascribed to difference in the DDC of these tokens4. On the other hand, identity in behavior between two molecularly identical subjects whose thought-tokens have different truth-conditions is explained in terms of the NC- identity of these tokens5..

In his latest book, The Elm and the Expert (1994), Fodor notoriously rejects the notion of narrow content as superfluous. He envisions a scientific intentional psychology that adverts only to broad content properties in its explanations. I argue that Fodor's change in view is only apparent and that his previous position (1985-1991) is extensionally equivalent to his "new" position (1994). I show that, despite what he says narrow content is for in his (1994), Fodor himself has previously never appealed to the notion of narrow content in explaining Frege cases and cases involving the so-called deferential concepts. And for good reason: his notion of narrow content (1985-91) couldn't explain them. The only apparent change concerns his treatment of Twin Earth cases. However, I argue that the notion of broad content that his purely informational semantics delivers is, in some interesting sense, equivalent to the mapping notion of narrow content he officially gave up. For his pure informational semantics fails to avoid assigning disjunctive content to twins, since nomic covariations take care not only actual but also counterfactual contexts into account. I show that none of the attempts made by Fodor to block this consequence of his theory works. The present notion of broad content he now operates with is therefore in a position to take over all the important jobs that his previous notion of narrow content could do.

The purpose of the present paper is to develop and defend an account of narrow content that would neutralize the commonplace charge that narrow content.

ONE way t0 defend narrow content is to produce a sentence 0f the form ‘S believes that P’, and show that this sentence is true 0f S if and 0nly if it is true 0f any duplicate from the skin in, any doppclgangcr, of S. N0toriously, this is hard to d0. Twin Earth examples are pervasivc.1 Another way to defend narrow content; is t0 show that Only 2. narrow notion can play thc causal explanatory r01c we require 0f contcnt in 2. properly scicntiicm psychology 0r cognitive science. Notoriously, this is hard t0 d0. The considerations—mcthod010gicaI solipsism, the principle 0f autonomy, 0r what:cvcr—invokcd to show that a broad notion 0f content cannot..

In everyday life, we typically explain what people do by attributing mental states such as beliefs and desires. Such mental states belong to a class of mental states that are _intentional_, mental states that have content. Hoping that Johnny will win, and believing that Johnny will win are of course rather different mental states that can lead to very different behaviour. But they are similar in that they both have the same content : what is being hoped for and believed is the very same thing. According to the thesis of externalism that has been defended most notably by Hilary Putnam and Tyler Burge, not all of the contents of our mental states are determined by our intrinsic properties. Instead, the contents of our beliefs and desires are often determined in part by our relations to the environment. They are, so to speak, "wide" contents that are "not in our heads." Although externalism is accepted by most philosophers, many have argued that mental states with wide contents must also have a kind of content wholly determined by the intrinsic properties of the individuals who are in those states. This kind of content is called "narrow content". The aim of this paper is to distinguish between three rather different motivations for postulating narrow content. I argue that, given a certain conception of narrow content that I shall explain below, none of these three motivations succeed in establishing the existence of narrow content.

Narrow mental content is a kind of mental content that does not depend on an individual's environment. Narrow content contrasts with “broad” or “wide” content, which depends on features of the individual's environment as well as on features of the individual. It is controversial whether there is any such thing as narrow content. Assuming that there is, it is also controversial what sort of content it is, what its relation to ordinary or “broad” content is, and how it is determined by the individual's intrinsic properties.