Knowledge and its Limits presents a systematic new conception of knowledge as a kind of mental stage sensitive to the knower's environment. It makes a major contribution to the debate between externalist and internalist philosophies of mind, and breaks radically with the epistemological tradition of analyzing knowledge in terms of true belief. The theory casts new light on such philosophical problems as scepticism, evidence, probability and assertion, realism and anti-realism, and the limits of what can be known. The arguments are (...) illustrated by rigorous models based on epistemic logic and probability theory. The result is a new way of doing epistemology and a notable contribution to the philosophy of mind. (shrink)

It is the proudest boast of the sciences that they are objective, clean of moral judgments, wertfrei. This insistence was salutary as the physical sciences struggled to loose themselves from the bonds of tradition, and it was natural that the social sciences took over the emphasis. Yet by a quirk of history the latter disciplines in striving for objectivity and amorality are unscientific. Far from being the hallmark of scientific method that students of society think it, the doctrine of Wertfreiheit (...) is of religious origin. It has always been the spokesmen of tradition who have said that science is without reference to morals and value, relegating this province to themselves. (shrink)

This book presents an attempt to develop a theory of knowledge and a philosophy of mind using ideas derived from the mathematical theory of communication developed by Claude Shannon. Information is seen as an objective commodity defined by the dependency relations between distinct events. Knowledge is then analyzed as information caused belief. Perception is the delivery of information in analog form for conceptual utilization by cognitive mechanisms. The final chapters attempt to develop a theory of meaning by viewing meaning as (...) a certain kind of information-carrying role. (shrink)

"Self-knowledge" is commonly used in philosophy to refer to knowledge of one's particular mental states, including one's beliefs, desires, and sensations. It is also sometimes used to refer to knowledge about a persisting self -- its ontological nature, identity conditions, or character traits. At least since Descartes, most philosophers have believed that self-knowledge is importantly different from knowledge of the world external to oneself, including others' thoughts. But there is little agreement about what precisely distinguishes self-knowledge from knowledge in other (...) realms. Partially because of this disagreement, philosophers have endorsed competing accounts of how we acquire self-knowledge. These accounts have important consequences for the scope of mental content, for mental ontology, and for personal identity. (shrink)

According to a rich tradition in philosophy of action, intentional action requires practical knowledge: someone who acts intentionally knows what they are doing while they are doing it. Piñeros Glasscock argues that an anti-luminosity argument, of the sort developed in Williamson, can be readily adapted to provide a reductio of an epistemic condition on intentional action. This paper undertakes a rescue mission on behalf of an epistemic condition on intentional action. We formulate and defend a version of an epistemic condition (...) that is free from any luminosity commitments. While this version of an epistemic condition escapes reductio, it comes with substantive commitments of its own. In particular, we will see that it forces us to deny the existence of any essentially intentional actions. We go on to argue that this consequence should be embraced. On the resulting picture, intentional action is not luminous. But it still entails practical knowledge. (shrink)

Ernest Sosa has argued that if someone knows that p, then his belief that p is “safe”. and Timothy Williamson has agreed. In this paper I argue that safety, as defined by Sosa, is not a necessary condition on knowledge – that we can have unsafe knowledge. I present Sosa’s definition of safety and a counterexample to it as a necessary condition on knowledge. I also argue that Sosa’s most recent refinements to the notion of safety don’t help him to (...) avoid the counterexample. I consider three replies on behalf of the defender of safety, and find them all wanting. Finally, I offer a tentative diagnosis of my counterexample. (shrink)

We often claim to know what might be—or probably is—the case. Modal knowledge along these lines creates a puzzle for information-sensitive semantics for epistemic modals. This paper develops a solution. We start with the idea that knowledge requires safe belief: a belief amounts to knowledge only if it could not easily have been held falsely. We then develop an interpretation of the modal operator in safety that allows it to non-trivially embed information-sensitive contents. The resulting theory avoids various paradoxes that (...) arise from other accounts of modal knowledge. It also delivers plausible predictions about modal Gettier cases. (shrink)

We describe the three place relation of contrastive knowledge, which holds between a person, a target proposition, and a contrasting proposition. The person knows that p rather than that q. We argue for three claims about this relation. (a) Many common sense and philosophical ascriptions of knowledge can be understood in terms of it. (b) Its application is subject to fewer complications than non-contrastive knowledge is. (c) It applies over a wide range of human and nonhuman cases.

There are these two absolutely basic problems: to learn about the universe and ourselves as a part of the universe, and to learn how to create a civilized world. Essentially, we have solved the first problem. We solved it when we created modern science. That is not to say that we know everything that is to be known, but we created a method for improving our knowledge about the world. But we haven't solved the second problem. And to solve the (...) first problem without solving the second problem is very, very dangerous. The crisis is this: the crisis of having science without civlization. (shrink)

That knowledge does not depend on truth is a consequence of a basic principle concerning dependence applied to the case of knowledge: that A depends on C, and that B depends on C, do not mean that A depends on B. This is a standard causal scenario, where two things with a common cause are not themselves causally dependent. Similarly, knowledge that p depends in part on some combination of the belief that p, the fact that p and the proposition (...) that p, and perhaps other facts or even objects. Truth depends on a proper sub-class of the elements on which knowledge depends. It does not follow that knowledge depends on truth, and the idea that it does is implausible. (shrink)

This work opens with a development of the notion of Unfathomed Knowledge, which Bartley makes clear by using it to explain such recent scientific advances as the development of drugs for the treatment of AIDS, and by showing its implications for such far-flung fields as the Marxist theory of alienation, the sociology of knowledge, patent law, and morality.

Berkeley's idealism started a revolution in philosophy. As one of the great empiricist thinkers he not only influenced British philosophers from Hume to Russell and the logical positivists in the twentieth century, he also set the scene for the continental idealism of Hegel and even the philosophy of Marx. -/- There has never been such a radical critique of common sense and perception as that given in Berkeley's Principles of Human Knowledge (1710). His views were met with disfavour, and his (...) response to his critics was the Three Dialogues between Hylas and Philonous. -/- This edition of Berkeley's two key works has an introduction which examines and in part defends his arguments for idealism, as well as offering a detailed analytical contents list, extensive philosophical notes and an index. (shrink)

I contrast two solutions to the lottery paradox concerning knowledge: contextualism and subject-sensitive invariantism. I defend contextualism against an objection that it cannot explain how 'knows' and its cognates function inside propositional attitude reports. I then argue that subject-sensitive invariantism fails to provide a satisfactory resolution of the paradox.

This paper discusses some engineering considerations that should be taken into account when building a knowledge based system, and recommends isomorphism, the well defined correspondence of the knowledge base to the source texts, as a basic principle of system construction in the legal domain. Isomorphism, as it has been used in the field of legal knowledge based systems, is characterised and the benefits which stem from its use are described. Some objections to and limitations of the approach are discussed. The (...) paper concludes with a case study giving a detailed example of the use of the isomorphic approach in a particular application. (shrink)

This paper argues for a novel solution to the Cartesian Circle by emphasising the important epistemic role of the Second Meditation and Descartes’ faculty epistemology. I argue that, for Descartes: doubt requires a ‘good reason’ to doubt ; whether a reason qualifies as a ‘good reason’ depends on which faculty produces that reason ; and for distinct metaphysical perceptions from the faculty of the intellect, no other faculty can provide ‘good reasons’ to doubt. The upshot of §2 is that the (...) doubts raised up to the Third Meditation do not apply to the distinct metaphysical perceptions of the intellect, and in particular do not apply to the premises of the proof of the existence of God. I present the role of God as primarily to secure clear and distinct perceptions beyond the intellect, and knowledge of conclusions when those conclusions are no longer being clearly and distinctly perceived. Finally, I give an account of Descartes’ use of ‘ cognoscere ’, ‘ scire ’, and ‘ scientia ’ as three distinct epistemic levels, providing a valuable structure within which one can see the meditator progress. (shrink)

The article takes up a range of issues concerning knowledge of language in response to recent work of Rey, Smith, Matthews and Devitt. I am broadly sympathetic with the direction of Rey, Smith, and Matthews. While all three are happy with the locution ‘knowledge of language’, in their different ways they all reject the apparent role for a substantive linguistic epistemology in linguistic explanation. I concur but raise some friendly concerns over even a deflationary notion of knowledge of language. Against (...) Devitt I have more serious worries. The latter half of the paper seeks further clarification of Devitt’s realism and raises concerns over its ability to reflect the shape and content of linguistics. (shrink)

I develop a challenge for a widely suggested knowledge-first account of belief that turns, primarily, on unknowable propositions. I consider and reject several responses to my challenge and sketch a new knowledge-first account of belief that avoids it.

The paper is concerned with the semantics of knowledge attributions(K-claims, for short) and proposes a position holding that K-claims are contextsensitive that differs from extant views on the market. First I lay down the data a semantic theory for K-claims needs to explain. Next I present and assess three views purporting to give the semantics for K-claims: contextualism, subject-sensitive invariantism and relativism. All three views are found wanting with respect to their accounting for the data. I then propose a hybrid (...) view according to which the relevant epistemic standards for evaluating K-claims are neither those at the context of the subject (subject-sensitive invariantism), nor those at the context of the assessor (relativism), but it is itself an open matter. However, given that we need a principled way of deciding which epistemic standards are the relevant ones, I provide a principle according to which the relevant standards are those that are the highest between those at the context of the subject and those at the context of the assessor/attributor. In the end I consider some objections to the view and offer some answers. (shrink)

Skeptics claim that we know radically less than we think we do. For example, skeptics might claim that we have next to no knowledge of the past, the future, or other minds. Here we will consider the skeptical claim that we have next to no knowledge of the external world: the world of physical objects that we at least seem to perceive. One well-known argument in support of this claim appeals to the possibility of being a BIV: a brain in (...) a vat. According to the BIV Hypothesis, you are a mere BIV without a normal body. This of course means, among other things, that you don't have hands. The nerve endings of your brain are stimulated in a manner so sophisticated that the perfect illusion of a normal life is generated. Let's distinguish between the.. (shrink)