Chomsky’s London

Semantic externalism is the view according to which proper names and other nominals have the capacity to refer to language-independent objects. On this view, the proper name ‘London’ is related semantically to a worldly object, London. Chomsky’s long held position is that this relational conception of reference is untenable. According to his internalist framework, semantics should be restricted to the examination of the informational features of I-language items. Externalists reject this restriction by saying that without employing the relational notion of reference, it would remain entirely mysterious how we can talk about our perceptible environment. This paper offers a novel argument for externalism. The basic idea is that external reference proves to be indispensable even for Chomskyans who regard our talk about the environment as irrelevant for the purposes of semantics.

Scepticism and semantic externalism

In this paper, I analyze the anti-skeptical strategy based on Putnam?s semantic externalism, and developed by, among others, Brueckner and Forbes. Popularity of this strategy is stifled by its seeming reliance on question-begging arguments. My aim is to show that these arguments do not, in fact, beg the question. I do that by emphasizing independent theoretical backing of semantic externalism and disquotational principle that the premises of semantic versions of the relevant arguments rely on. In order to shed light both on the sources of the impression that something is wrong with this anti-skeptical strategy, and on the reasons why this impression is ultimately misleading, I derive implications of soundness of the relevant arguments for our understanding of, previously unacknowledged, relationship between skeptical hypotheses and the language used to formulate them. Among these implications is a very significant fact that the way our language relates to reality, if the thesis of semantic externalism is correct, effectively blocks a certain type of very popular global skeptical strategies by depriving the skeptic of conceptual resources needed for formulating the scenarios appropriate for his aims.

Folk intuitions about reference change and the causal theory of reference

In this paper, we present and discuss the findings of two experiments about reference change. Cases of reference change have sometimes been invoked to challenge traditional versions of semantic externalism, but the relevant cases have never been tested empirically. The experiments we have conducted use variants of the famous Twin Earth scenario to test folk intuitions about whether natural kind terms such as ‘water’ or ‘salt’ switch reference after being constantly (mis)applied to different kinds. Our results indicate that this is indeed so. We argue that this finding is evidence against Saul Kripke’s causal-historical view of reference, and at least provisional evidence in favor of the causal source view of reference as suggested by Gareth Evans and Michael Devitt.

In Defence of a Reciprocal Turing Test

The traditional Turing test appeals to an interrogator's judgement to determine whether or not their interlocutor is an intelligent agent. This paper argues that this kind of asymmetric experimental set-up is inappropriate for tracking a property such as intelligence because intelligence is grounded in part by symmetric relations of recognition between agents. In place, it proposes a reciprocal test which takes into account the judgments of both interrogators and competitors to determine if an agent is intelligent. This form of social interaction better tracks both the evolution of natural intelligence and how the concept of intelligence is actually used within our society. This new test is defended against the criticisms that a proof of intelligence requires a demonstration of self-consciousness and that semantic externalism entails that a non-embodied Turing test is inadequate.

Conceptual Truth, Necessity, and Negation

Throughout his philosophical career, Hilary Putnam was preoccupied with the question of what survives of the traditional notion of a priori truth in light of the recurring historical phenomenon, made prominent by the scientific revolutions of the early decades of the twentieth century, through which “something that was literally inconceivable has turned out to be true” (1962b). Impugning the analytic-synthetic dichotomy, Putnam’s redefinition of “conceptual truth” in terms of “quasi-necessity relative to a conceptual scheme” is meant to accommodate the possibility of transitions of just this sort. In this essay, I trace the origins and development of Putnam’s account of “quasi-necessity.” I try to defend it against some objections naturally arising in connection with the interplay of modality and negation. My main contention is that the main tenets of Putnam’s semantic externalism inform his reconception of conceptual truth, and that they must be recognized to hold of such basic logical notions as those of judgment and negation.

Reports from Twin Earth: Both deep structure and appearance determine the reference of natural kind terms

Following the influential thought experiments by Hilary Putnam and others, philosophers of language have for the most part adopted semantic externalism concerning natural kind terms. In this paper, we present results from three experiments on the reference of natural kind terms. Our results confirm some standard externalist assumptions, but are in conflict with others: ordinary speakers take both appearance and underlying nature to be central in their categorization judgments. Moreover, our results indicate that speakers’ categorization judgments are gradual, and proportional to the degree of similarity between new samples and familiar, “standard” samples. These findings pose problems for traditional theories, both externalist and internalist.