Abstract: Williamson argues that when one feels cold, one may not be in a position to know that one feels cold. He thinks this argument can be generalized to show that no mental states are such that when we are in them we are in a position to know that we are in them. I argue that his argument is a sorites argument in disguise because it relies on the implicit premise that warming up is gradual. Williamson claims that his (...) argument is not a sorites argument; I explain why he has not given us any reason to accept the claim. (shrink)

The linchpin of Williamson (2000)'s radically externalist epistemological program is an argument for the claim that no non-trivial condition is luminous—that no non-trivial condition is such that whenever it obtains, one is in a position to know that it obtains. I argue that Williamson's anti-luminosity argument succeeds only if one assumes that, even in the limit of ideal reflection, the obtaining of the condition in question and one's beliefs about that condition can be radically disjoint from one another. However, no (...) self-respecting defender of the luminosity of the mental would ever make such an assumption. Thus Williamson can only secure his controversial claims in epistemology by taking for granted certain equally controversial claims in the philosophy of mind. What emerges is that the best bet for defending an internalist epistemology against Williamson's attack is to take there to be a tight, intimate connection between (to take one example) our experiences and our beliefs upon reflection about the obtaining of those experiences, or between (to take another example) the rationality of our beliefs and our beliefs upon reflection about the rationality of those beliefs. (shrink)

In his recent Knowledge and its Limits, Timothy Williamson argues that no non-trivial mental state is such that being in that state suffices for one to be in a position to know that one is in it. In short, there are no “luminous” mental states. His argument depends on a “safety” requirement on knowledge, that one’s confident belief could not easily have been wrong if it is to count as knowledge. We argue that the safety requirement is ambiguous; on one (...) interpretation it is obviously true but useless to his argument, and on the other interpretation it is false. (shrink)

Most of us, tacitly or explicitly, embrace a more or less Cartesian conception of our epistemic condition. According to such a conception, "what we have to go on" in learning about the world is, on the one hand, that which is a priori accessible to us, and, on the other, the inner experiences - visual imagery, tactile sensations, recollective episodes and so on - that pop into our Carte- sian theaters. One of the central themes of Knowledge and its Limits (...) is that this picture is fundamentally wrong. Williamson suggests that we should embrace the thesis that our body of evidence at a given time is all and only that which we know. Call this the "E=K thesis." If the E=K thesis is correct, then what we have to go on is both more and less than the Cartesian picture would suggest: more because its domain extends outwards in space, and for- wards and backwards in time; less because that which is unknown about our experiential life is excluded. In what follows, I shall identify and briefly discuss a number of themes connected to the E=K thesis. (shrink)

The paper argues against Timothy Williamson's anti-luminosity argument. It also offers an argument against luminosity from the possibility of defeat of introspective justification.

I distinguish two broad approaches to vagueness that I call "robust" and "wimpy". Wimpy construals explain vagueness as robust (i.e., does not manifest arbitrary precision); that standard approaches to vagueness, like supervaluationism or appeals to degrees of truth, wrongly treat vagueness as wimpy; that vagueness harbors an underlying logical incoherence; that vagueness in the world is therefore impossible; and that the kind of logical incoherence nascent in vague terms and concepts is benign rather than malignant. I describe some implications for (...) logic, semantics, and metaphysics. (shrink)

Experiences and beliefs are different sorts of mental states, and are often taken to belong to very different domains. Experiences are paradigmatically phenomenal, characterized by what it is like to have them. Beliefs are paradigmatically intentional, characterized by their propositional content. But there are a number of crucial points where these domains intersect. One central locus of intersection arises from the existence of phenomenal beliefs: beliefs that are about experiences.

A defense of antecedent physicalism, which argues against the idea that if everything that goes on in the universe is physical, our consciousness and feelings ..

Papineau in his book provides a detailed defense of physicalism via what has recently been dubbed the “phenomenal concept strategy”. I share his enthusiasm for this approach. But I disagree with his account of how a physicalist should respond to the conceivability arguments. Also I argue that his appeal to teleosemantics in explaining mental quotation is more like a promissory note than an actual theory.

Tim defines a "luminous" condition as one that we are always in a position to know that we are in, whenever we are in it. To explain the idea of being in a position to know, Tim tells us that we are in a position to know a proposition when it states a fact that is open to our view, unhidden, and with no obstacle to our knowing it. He also tells us that if we are in a position to (...) know a proposition, and we do what we are in a position to do toward knowing whether or not it is true, then we know it to be true. So a luminous condition obtains only if it is all set to be known to obtain by the one in the condition. (shrink)

_Identity and Discrimination_, originally published in 1990 and the first book by respected philosopher Timothy Williamson, is now reissued and updated with the inclusion of significant new material. Williamson here proposes an original and rigorous theory linking identity, a relation central to metaphysics, and indiscriminability, a relation central to epistemology.__ Updated and reissued edition of Williamson’s first publication, with the inclusion of significant new material Argues for an original cognitive account of the relation between identity and discrimination that has been (...) influential in the philosophy of perception Pioneers the use of epistemic logic to solve puzzles about indiscriminability Develops the application of techniques from mathematical logic to understand issues about identity over time and across possible worlds. (shrink)

The relation between subjective consciousness and the physical brain is widely regarded as the last mystery facing science. David Papineau argues that there is no real puzzle here. Consciousness seems mysterious, not because of any hidden essence, but only because we think about it in a special way. Papineau exposes the confusion, and dispels the mystery: we see consciousness in its place in the material world, and we are on the way to a proper understanding of the mind.

Timothy Williamson has recently argued that few mental states are luminous , meaning that to be in that state is to be in a position to know that you are in the state. His argument rests on the plausible principle that beliefs only count as knowledge if they are safely true. That is, any belief that could easily have been false is not a piece of knowledge. I argue that the form of the safety rule Williamson uses is inappropriate, and (...) the correct safety rule might not conflict with luminosity. (shrink)

Most of us, tacitly or explicitly, embrace a more or less Cartesian conception of our epistemic condition. According to such a conception, “what we have to go on”in learning about the world is, on the one hand, that which is a priori accessible to us, and, on the other, the inner experiences—visual imagery, tactile sensations, recollective episodes and so on—that pop into our Cartesian theaters. One of the central themes of Knowledge and its Limits is that this picture is fundamentally (...) wrong. Williamson suggests that we should embrace the thesis that our body of evidence at a given time is all and only that which we know. Call this the “E=K thesis.”If the E=K thesis is correct, then what we have to go on is both more and less than the Cartesian picture would suggest: more because its domain extends outwards in space, and forwards and backwards in time; less because that which is unknown about our experiential life is excluded. In what follows, I shall identify and briefly discuss a number of themes connected to the E=K thesis. (shrink)