I focus on two questions: what is knowledge, and how is knowledge possible? The latter is an example of a how-possible question. I argue that how-possible questions are obstacle-dependent and that they need to be dealt with at three different levels, the level of means, of obstacle-removal, and of enabling conditions. At the first of these levels the possibility of knowledge is accounted for by identifying means of knowing, and I argue that the identification of such (...) means also contributes to a proper understanding of what knowledge is. (shrink)

How is knowledge of the external world possible? How is knowledge of other minds possible? How is a priori knowledge possible? These are all examples of how-possible questions in epistemology. In this highly original book Quassim Cassam explains how such questions arise and how they should be answered.

An epistemological how-possible question asks how knowledge, or knowledge of some specific kind, is possible. Familiar epistemological how-possible questions include ‘How is knowledge of the external world possible?’, ‘How is knowledge of other minds possible?’ and ‘How is a priori knowledge possible?’ These are the three questions that I tackle in my book. In each case, I explain how and why the question arises and propose a way of answering it. The main negative claim of (...) the book is that transcendental arguments are of little use in answering how-possible questions. A transcendental demonstration of the necessity of a certain kind of knowledge does not amount to an explanation of its possibility. The main positive claim is that such questions call for what I describe as a multi-levels response. I give an account of the multi-levels approach and put it to use in explaining how various kinds of knowledge are possible.Epistemological how-possible questions are not directly concerned with whether knowledge is possible, but if we cannot explain how a certain kind of knowledge is possible then the reality of that kind of knowledge is called into question. How-possible questions are obstacle-dependent. We ask how knowledge …. (shrink)

This volume of original essays assesses Nozick's analyses of knowledge and evidence and his approach to skepticism. Several of the contributors claim that Nozick has not succeeded in rebutting the skeptic; some offer fresh accounts of skepticism and its flaws; others criticize Nozick's externalist accounts of knowledge and evidence; still others welcome externalism but attempt to replace Nozick's accounts of knowledge and evidence with more plausible analyses.

How is knowledge of the external world possible? How is knowledge of other minds possible? How is a priori knowledge possible? These are all examples of how-possible questions in epistemology. In this highly original book Quassim Cassam explains how such questions arise and how they should be answered.

A new understanding of Kant’s theory of a priori knowledge and his natural philosophy emerges from Jeffrey Edwards’s mature and penetrating study. In the Third Analogy of Experience, Kant argues for the existence of a dynamical plenum in space. This argument against empty space demonstrates that the dynamical plenum furnishes an a priori necessary condition for our experience and knowledge of an objective world. Such an a priori existence proof, however, transgresses the limits Kant otherwise places on transcendental (...) arguments in the _Critique of Pure Reason_ because it establishes a _material_ transcendental condition of possible experience. This finding motivates Edwards to examine the broader context of Kant’s views about matter, substance, causal influence, and physical aether in connection with the developmental history of his theory of transcendental idealism. Against the backdrop of early modern metaphysics and contemporaneous physical theory, Edwards explicates the origins of the Third Analogy in Kant’s early work on the metaphysics of nature. The argument against empty space presented in the Third Analogy reveals a central aspect of Kant’s transcendental theory of experience that Edwards explains lucidly. By clarifying the epistemological standpoint at issue in the Third Analogy, he shows that the fundamental revisions to which Kant subjects his theory of knowledge in the _Opus postumum_ not only originate in his precritical metaphysics of nature but are developments of an argument central to the _Critique of Pure Reason_ itself. Edwards’s work is important to scholars working in the history of philosophy and the history and philosophy of science, as well as to Kant specialists. (shrink)

A new understanding of Kant’s theory of a priori knowledge and his natural philosophy emerges from Jeffrey Edwards’s mature and penetrating study. In the Third Analogy of Experience, Kant argues for the existence of a dynamical plenum in space. This argument against empty space demonstrates that the dynamical plenum furnishes an a priori necessary condition for our experience and knowledge of an objective world. Such an a priori existence proof, however, transgresses the limits Kant otherwise places on transcendental (...) arguments in the _Critique of Pure Reason_ because it establishes a _material_ transcendental condition of possible experience. This finding motivates Edwards to examine the broader context of Kant’s views about matter, substance, causal influence, and physical aether in connection with the developmental history of his theory of transcendental idealism. Against the backdrop of early modern metaphysics and contemporaneous physical theory, Edwards explicates the origins of the Third Analogy in Kant’s early work on the metaphysics of nature. The argument against empty space presented in the Third Analogy reveals a central aspect of Kant’s transcendental theory of experience that Edwards explains lucidly. By clarifying the epistemological standpoint at issue in the Third Analogy, he shows that the fundamental revisions to which Kant subjects his theory of knowledge in the _Opus postumum_ not only originate in his precritical metaphysics of nature but are developments of an argument central to the _Critique of Pure Reason_ itself. Edwards’s work is important to scholars working in the history of philosophy and the history and philosophy of science, as well as to Kant specialists. (shrink)

1. Quassim Cassam's subtle book, The Possibility of Knowledge, 1 contains many insights. My goal here is not to attempt to give a sense of all that this book has to offer – which I suspect would be foolhardy in the extreme – but rather to explore one particular central theme of this book that I find especially interesting – viz. the application of the ‘multi-level’ response to ‘how possible?’ questions that Cassam offers to the problem of radical (...) scepticism.2. A central contention of Cassam's book is that we should re-cast sceptical problems in terms of ‘how possible?’ questions. Although it is not a sceptical problem that Cassam examines himself , consider how this re-casting would work as regards the problem of free will. The relevant ‘how possible?’ question would be: " How is free will possible?" There are two features of ‘how possible?’ questions that are important for our purposes. The first is that they are by their nature challenging in that they imply that there is a standing obstacle to the possibility in question. In the case of , this obstacle is the familiar one concerning determinism. The second is that they do not presuppose that the target thing – in this case free will – is impossible; rather, they simply ask how such a thing could be possible.These two features of ‘how possible?’ questions impose constraints on what would constitute a satisfactory response to such a question. On the one hand, it would clearly be pointless to respond to such a question by simply insisting – on the basis of commonsense, say – that the target thing is possible, since the question was not suggesting …. (shrink)

Paradox and the Possibility of Knowledge argues that psychoanalytic theory has certain mostly unnoticed features that bring out, with unusual clarity, a logic that is true of conceptual thought generally. This logic is paradoxical in that it is deliberately and productively self-canceling. The general relevance of this logic to conceptual thought and to theory offers a solution to some fundamental epistemological problems. First, it allows a solution to the problem of the ultimate circularity or infinite regress of (...) class='Hi'>knowledge, by showing how the circle or regress eliminates itself in a variety of successful knowledge-grounding ways. Second, it offers some resulting insights into issues involving politically troublesome dimensions of knowledge, specifically into the procedure of ethical political dialogue. The book is written in the contexts of both Anglo-American philosophy and Continental or European philosophy. The argument is largely Wittgensteinian, and at the same time proceeds through detailed reference to Freud's and Lacan's work. On the way it addresses theory construction in general, including the claims of phenomenology and deconstruction. (shrink)

If knowledge requires safety, then one might think that when the epistemic source of knowledge is testimony, that testimony must itself be safe. Otherwise, will not the lack of safety transfer from testimony to hearer, such that hearer will lack knowledge? Resisting this natural line of reasoning, Goldberg (2005; 2007) argues that testimonial knowledge through unsafe testimony is possible on the basis of two cases. Lackey (2008) and Pelling (2013) criticize Goldberg’s examples. But Pelling goes on (...) to provide his own example that attempts to show that Goldberg’s thesis is true: one can gain safe testimonial belief from unsafe testimony. If any of these counterexamples were correct, they would undermine the main reason to think that knowledge based on unsafe testimony is impossible. My aim in this paper is to critically assess these arguments, and to consider the possibility of knowledge through unsafe testimony. Drawing a general moral from the analysis of these cases, I shall contend that it is impossible to acquire safe belief solely on the basis of unsafe testimony. If so, then testimonial knowledge based solely on unsafe testimony is impossible. (shrink)

In this series of studies A. C. Grayling looks at approaches the problem of how sceptical challenges can be met.

An epistemological how-possible question asks how knowledge, or knowledge of some specific kind, is possible. Familiar epistemological how-possible questions include ‘How is knowledge of the external world possible?’, ‘How is knowledge of other minds possible?’ and ‘How is a priori knowledge possible?’ These are the three questions that I tackle in my book. In each case, I explain how and why the question arises and propose a way of answering it. The main negative claim of (...) the book is that transcendental arguments are of little use in answering how-possible questions. A transcendental demonstration of the necessity of a certain kind of knowledge does not amount to an explanation of its possibility. The main positive claim is that such questions call for what I describe as a multi-levels response. I give an account of the multi-levels approach and put it to use in explaining how various kinds of knowledge are possible.Epistemological how-possible questions are not directly concerned with whether knowledge is possible, but if we cannot explain how a certain kind of knowledge is possible then the reality of that kind of knowledge is called into question. How-possible questions are obstacle-dependent. We ask how knowledge …. (shrink)

This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, (...) and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant. (shrink)

In this paper, I propose a solution to Fitch’s paradox that draws on ideas from Edgington (Mind 94:557–568, 1985), Rabinowicz and Segerberg (1994) and Kvanvig (Noûs 29:481–500, 1995). After examining the solution strategies of these authors, I will defend the view, initially proposed by Kvanvig, according to which the derivation of the paradox violates a crucial constraint on quantifier instantiation. The constraint states that non-rigid expressions cannot be substituted into modal positions. We will introduce a slightly modified syntax and semantics (...) that will help underline this point. Furthermore, we will prove results about the consistency of verificationism and the principle of non-omniscience by model-theoretical means. Namely, we prove there exists a model of these principles, and delineate certain constraints they pose on a structure in which they are true. (shrink)

Philosophers like asking questions about knowledge. What is it exactly? Why do we value it so much? And do we have any? Ideally they would like an account of the nature of knowledge that shows sceptical doubts about its existence to be unmotivated. Unfortunately two millenia of effort have not produced much in the way of agreed results.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to (...) be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant. (shrink)

Groff defends 'realism about causality' through close discussions of Kant, Hilary Putnam, Brian Ellis and Charles Taylor, among others. In so doing she affirms critical realism, but with several important qualifications. In particular, she rejects the theory of truth advanced by Roy Bhaskar. She also attempts to both clarify and correct earlier critical realist attempts to apply realism about causality to the social sciences. By connecting issues in metaphysics and philosophy of science to the problem of relativism, Groff bridges the (...) gap between the philosophical literature and broader debates surrounding socio-political theory and poststructuralist thought. This unique approach will make the book of interest to philosophers and socio-political theorists alike. (shrink)

Kant retired from teaching in 1796 and immediately began work in earnest on a new project that was supposed to complete his critical philosophy. It was never finished, and it has come down to us as a messy pile of notes published as volumes 21 and 22 in the “Academy edition” of Kant’s writings. The consensus today is that the so-called Opus Postumum would provide an immensely valuable window on the final state of Kant’s philosophy—if somebody could just make sense (...) of it. A number of scholars writing in English have taken up the challenge in full-length studies in the last few years. One of them is Jeffrey Edwards. (shrink)

J. L. Mackie; XIII—The Possibility of Innate Knowledge, Proceedings of the Aristotelian Society, Volume 70, Issue 1, 1 June 1970, Pages 245–260, https://doi.org.

The purpose of this article is to show that Piaget's use of the equilibrium principle cannot explain the possibility of correct understanding. That is, it cannot explain the possibility of knowledge, as opposed to simple change in belief. To make the argument, I begin by describing Piaget's explanatory model, which is known as the equilibrium principle. I then argue that correct understanding, or knowledge of any x as a case of y, requires a concept of correctness, (...) i.e., the recognition that words and concepts apply under some conditions but not others. I try to show that because he uses the equilibrium principle as a basis for his explanation, Piaget cannot explain how a concept of correctness is acquired. Finally, I argue that to explain the possibility of knowledge, one must show how the conditions for word and concept application are determined by a community of language users. Again, I claim that Piaget's use of the equilibrium model precludes such an account. (shrink)

In this paper I defend the traditional anti-intellectualist claim that a form of knowing how to Φ (e.g., knowing how to play the guitar) exists that entails the ability to Φ (play the guitar), and that this knowledge cannot be reduced to propositions (such as ‘S knows a way _w_ to Φ’, where _w_ is a means of Φing). I also argue that S can know how to Φ in the absence of the ability to Φ, and for this (...) knowledge to be likewise irreducible to propositions. This is made possible when one distinguishes between type and token actions. Moreover, I contend that type and token actions, and one’s ability to engage in them, are differentiated at the level of motor representations. Motor representations provide an alternate means of grading knowledge how to that presented by Carlotta Pavese, insofar as this form of gradable knowledge is likewise irreducible to propositions. (shrink)

Endorsing the idea of group knowledge seems to entail the possibility of group belief as well, because it is usually held that knowledge entails belief. It is here studied whether it would be possible to grant that groups can have knowledge without being committed to the controversial view that groups can have beliefs. The answer is positive on the assumption that knowledge can be based on acceptance as well as belief. The distinction between belief and (...) acceptance can be seen as a refinement of the ordinary language concept of belief, and it may be useful in understanding the nature of epistemic justification and classifying various types of epistemic subjects. (shrink)

Traditionally one associates scepticism with the position that nothing is, or can be, known for certain. Hence it was only natural that for a long time one should have approached the ancient sceptics with the assumption that they were the first to try to establish or to defend the view that nothing is, or can be, known for certain, especially since there is abundant evidence which would have seemed to bear out the correctness of this approach. After all, extensive arguments (...) to the effect that there is no certain knowledge or that things are unknowable play a central role in our ancient sources on scepticism. And thus Hegel, Brandis, Zeller, and their successors were naturally led to take these arguments at face value and to assume that the sceptics were trying to show that nothing can be known. Closer consideration of the matter, though, shows that it cannot have been the position of the major exponents of ancient scepticism, whether Academic or Pyrrhonean, that nothing is, or can be, known. And this for the simple reason that the major ancient sceptics were not concerned to establish or to defend any position, let alone the position that nothing is, or can be, known. In fact, they went out of their way to point out that, though they produced arguments for it, they did not actually take the position that nothing can be known (cf. S.E., PH 1. 200–1). (shrink)

Gettier cases are used to show that having a justified true belief is not sufficient for knowledge. They are cases in which an epistemic agent has a belief that is both justified and true, but intuitively cannot be taken to count as knowledge. Modal epistemology is the field of philosophy that tackles questions regarding the sources of our knowledge of modalities (possibility and necessity) and what offers justification for beliefs about what is possible or necessary. Part (...) of the tradition in modal epistemology is to consider conceivability as a guide to metaphysical possibility. As such, if an agent can conceive that P, then the agent is justified to believe that P is metaphysically possible. In this paper I will discuss the possibility of constructing Gettier cases for a tripartite, conceivability-based, definition of modal knowledge. (shrink)

1. The spatial perception requirementCassam surveys arguments for what he calls the ‘Spatial Perception Requirement’ . This is the following principle: " SPR: In order to perceive that something is the case and thereby to know that it is the case one must be capable of spatial perception. " A couple of preliminary glosses. By ‘spatial perception’ Cassam means either perception of location, or perception of specifically spatial properties of an object, such as its size and shape. Second, Cassam takes (...) it that there is something basic about cases in which one's perceiving that something is the case depends on perception of an object. That is, he takes it that there is something basic about such cases as that in which, for example, you perceive that the door is open by perceiving the door.On this second point, it is not quite obvious that one could not perceive that things are thus and so if one could not perceive material objects. Cannot someone lost in fog, for example, perceive that it is foggy, even if they cannot see a thing because of the fog? Moreover, suppose we have someone who cannot perceive that things are thus and so. This person has only a series of sensations. Is it obvious that this person could not come to have knowledge of their world by reasoning about the probable causes of those sensations? These points seem to me to have some interest, but I will not pursue them here. I will assume we are considering cases in which propositional knowledge is grounded in perception that such and such is the case, and that this in turn depends on perception of objects.One sort of argument you might give for SPR runs as follows. Perception of an object demands that you have perceptually differentiated the object from its …. (shrink)