Externalism and Self-Knowledge

This paper offers a critical interpretation and evaluation of Wilfrid Sellars’s treatment of skepticism about empirical justification. It defends three central claims. First, against the suggestion that Sellars’s work simply bypasses traditional skeptical problems, I make the novel interpretive claim that Sellars not only addresses skepticism about empirical justification, but offers two independent (albeit sketchy) arguments against it: a transcendental argument that the likely truth of our perceptual beliefs is a necessary condition of the possibility of empirical content, and a (...) pragmatic argument that we’re warranted in accepting their likely truth in virtue of our aim of being effective agents. To the extent these have previously been distinctly formulated by commentators, the transcendental argument has been regarded as forceful, while the pragmatic argument has been dismissed as non-responsive. My second and third claims challenge this understanding. I argue, second, that examination of the literature relating to transcendental arguments from semantic externalism like Sellars’s (especially concerning the McKinsey paradox) suggests that such arguments are unpromising, while, third, a modified version of his pragmatic argument represents a powerful skeptical solution to skepticism about empirical justification, one that answers the worry that such skepticism would undermine the rationality of all our practical commitments. (shrink)

___MERGING of temporally distant events: One perceives a singular causal relation that c causes e whenever c instantiates a mental property C which anticipates a certain mental property E instantiated by e. Such a knowledge of future self is feasible by there being a common mental property D that is instantiated by both c and e. -/- ___SPLITTING to temporally distant events: In the action that is aimed to bring about E, the knowledge or perception or D (explained by the (...) anticipation of E by C) in turn causally explains an event cc instantiating C and then (via causing cc) event ee instantiating E. (shrink)

This paper argues that, given a certain apparently inevitable thesis about content, we could not know our own minds. The thesis is that the content of a thought is determined by its relational properties.

Duality explains everything. Language unnecessary, and, actually, superfluous.

En este artículo abordo uno de los problemas que pone de manifiesto la presunta incompatibilidad entre el externismo y el conocimiento que posee un sujeto sobre el contenido de sus pensamientos. El problema se basa en algunas supuestas consecuencias del externismo concernientes a la existencia de sustancias u objetos externos al sujeto pensante: si el externismo es a priori, entonces un sujeto puede saber a priori que existe el agua, meramente conociendo a priori su pensamiento sobre el agua. Las dos (...) respuestas compatibilistas principales que desarrollo explotan el papel desempeñado por la experiencia en el conocimiento a priori. Una vez se tiene en cuenta la experiencia requerida para poder tener los pensamientos relevantes resulta menos sorprendente que un sujeto pueda adquirir conocimiento a priori sobre la existencia del agua, o sobre una condición similar pero más débil que efectivamente se seguiría del externismo. I approach in this article one of the problems which purportedly would show the incompatibility of externalism and authoritative self-knowledge. The problem is based on some alleged consequences of externalism regarding the existence of substances or objects external to the thinker: if externalism is a priori, then a subject can know a priori that water exists by knowing a priori his thought about water. The two main compatibilist responses I work out exploit the role played by experience in a priori knowledge. Taking into account the experience required to entertain the relevant thoughts makes less puzzling that a subject could acquire a priori knowledge about water's existence, or about a weaker related condition which is the real commitment of externalism. (shrink)

Traditionally, Anglophone philosophers have assumed that the identity of a thought is determined wholly by the subject's intrinsic states--e.g., her brain states. In the 1970's, this traditional view (lately called 'individualism' or ‘internalism’) was challenged by Hilary Putnam and Tyler Burge, who argued that the contents of one’s beliefs, desires, intentions are partly determined by one's physical, social and/or linguistic environment. The question is not whether the environment causes one to think what one does. Rather, the question is one of (...) the identity of thoughts: In virtue of what is a thought the particular thought that it is? According to Putnam and Burge, the answer lies partly in the environment. What makes the belief expressed by ‘water is wet’ the belief that it is depends on the presence of H2O in the environment, not just on the believer’s internal states. The view that thoughts are individuated in part by environmental factors has come to be called ‘anti-individualism’ or ‘externalism’. (shrink)

Ever since the 1970’s, philosophers of mind have engaged in a lively discussion of Externalism. Externalism is the metaphysical thesis that the contents of one’s thoughts are determined partly by empirical features of one’s environment. Externalism appears to clash with another plausible thesis—the epistemological thesis that one can have knowledge of one’s own thoughts, without evidence or empirical investigation. Many have argued that the conjunction of these theses is incompatible. I have argued elsewhere for their compatibility.1 Here I’ll just assume (...) that they are compatible and explore some consequences of conjoining a particular externalist thesis about the contents of thoughts (Social Externalism) with a particular thesis about self-knowledge (First-Person Authority). (shrink)

The paper is sympathetic to the idea that speakers have implicit knowledge of the semantics of sub-sentential elements of language, loosely, of words. Implicit knowledge is knowledge which the subject need not be capable of articulating yet which is a genuine propositional attitude and it is to be contrasted with tacit knowledge which refers to an information-bearing state which, however, is not a genuine propositional attitude. I begin by defending the implicit knowledge conception of speakers' knowledge of the meanings of (...) words from a challenge articulated by Evans and then go on the offensive against positions which attempt to replace the notion of implicit knowledge in semantic theory by that of tacit knowledge. (shrink)

In this paper I argue in favor of the compatibility of semantic externalism with privileged self-knowledge by showing that an argument for incompatibilism from switching scenarios fails. Given the inclusion theory of self-knowledge, the hypothesis according to which I am having twater thoughts while thinking that I have water thoughts simply isn't a (entertainable) possibility. When I am on Earth thinking earthian concepts, I cannot believe that I am thinking that twater is wet for I don't have the concept of (...) twater available; so this concept cannot figure in any of my mental states. Analogously, when I am on Twin Earth, I cannot mistakenly believe that I am entertaining water thoughts. No matter how often I am switched between Earth and Twin Earth, I will never erroneously think that I am having water thoughts while in fact I am having twater thoughts and vice versa. Privileged self-knowledge is therefore immune to skeptical arguments from switching and twinning scenarios. (shrink)

Externalism is the view that some crucial element in the content of our representational states is outside of not just the states whose content they are but even the person who has those states. If so, the contents of such states (and, many hold, the states themselves) do not supervene on anything local to the person whose has them. There are a number of different candidates for what that element is: function (Dretske), causal connection (Putnam, Kripke, Fodor), and social context (...) (Davidson). (Burge has foot in both the causal connection and the social context camps and Dennett fits in here somewhere, too.) This diversity will turn out to be important. The paper starts with Dretske but gets to other varieties of. (shrink)

M. McKinsey has argued that the externalist theory of mental content implies that one can have a priori knowledge of propositions that are in fact only knowable a posteriori. So, according to McKinsey, the externalist theory must be mistaken. A. Gallois and J. O'Leary-Hawthorne have formalized this argument. In this paper, I discuss their formalization and their criticisms of it.

Focuses on the arguments that show the externalism of mental content. Discussion on the principle of knowledge identification; Account of basic self-knowledge; Interpretations of sentence content; Skepticism of knowledge content.

Harold Langsam has recently presented a novel observational account of self-knowledge. I critically discuss this account and argue that it fails to provide a uniform understanding of how we are able to know the contents of our own thoughts.

This is a response to an argument (by Michael McKinsey) purporting to show that anti-individualism is trivially true. I show that this argument rests upon a misconception of the basic claim of anti-individualism.

The argument that has inspired much of the recent discussion of the logical relationship between these views is found in Putnam : If externalism is true, then if S were a brain in a vat, S’s utterances of the sentence “I am a brain in a vat” would not express the proposition that S is a brain in a vat. S’s use of the words “brain” and “vat” would not refer to a real brain or vat, just as, in a (...) Twin Earth-style thought experiment, the Twin Earthling cannot refer to water with his use of the term “water.” If we accept that generally we have knowledge of the contents of our utterances, then, if S knows that her utterances of “brain” and “vat” mean brain and vat, it will be possible for S to know that she is not a brain in a vat. For if S has authority with respect to the contents of her utterances, then she can know that her utterance, “I am not a brain in a vat,” refers to brains and vats. On externalism, since S would not refer to brains and vats if she were a brain in a vat, she could know by mere introspection that she is not a brain in a vat. In fact, S can come to know many arbitrary propositions about the external world simply by attending to the contents of her thoughts. For if externalism is true, she can argue, then certain empirical conditions must be satisfied if she is even to have the thoughts about the external world that she does; since she knows what she is thinking, she knows these empirical conditions are satisfied. Thus, if S knows that she is thinking about brains and vats, then she can know that she is not a brain in a vat ; for if she was a BIV, then she would not be thinking about brains and vats, but instead about electrical impulses or some such thing. The standard BIV argument against scepticism, therefore, cannot be correct. This line of argument can then be used to conclude more generally that scepticism is false; for the argument can be run with virtually any utterance or thought with empirical content. If S knows that she is thinking about trees, for example, then she can know that there are trees. (shrink)

By exploiting a concept called ways of believing, I offer a plausible reformulation of the doctrine of privileged access. This reformulation will provide us with a defense of compatibilism, the view that content externalism and privileged access are compatible.