The Knowledge Argument

This paper explores and evaluates the famous Mary case put forward by Frank Jackson in support of what he calls the knowledge argument against physicalism. After laying out Jackson’s position, I set out to determine whether certain previous physicalist attempts at undermining it have been successful. Finding that they have not, I use their shortcomings to inform the construction of a new position, one which I argue renders the Mary case at odds with itself and frees physicalism from the knowledge (...) argument’s grasp. (shrink)

Colours appear to instantiate a number of structural properties: for instance, they stand in distinctive relations of similarity and difference, and admit of a fundamental distinction into unique and binary. Accounting for these structural properties is often taken to present a serious problem for physicalist theories of colour. This paper argues that a prominent attempt by Byrne and Hilbert to account for the structural properties of the colours, consistent with the claim that colours are types of surface spectral reflectance, is (...) unsuccessful. Instead, it is suggested that a better account of the structural properties of the colours is provided by a form of non-reductive physicalism about colour: a naïve realist theory of colour, according to which colours are superficial mind-independent properties. (shrink)

According to social externalism, it is possible to possess a concept not solely in virtue of one’s intrinsic properties but also in virtue of relations to one’s linguistic community. Derek Ball (2009) argues, in effect, that (i) social externalism extends to our concepts of colour experience and (ii) this fact undermines both the knowledge argument against physicalism and the most popular physicalist response to it, known as the phenomenal concept strategy. I argue that Ball is mistaken about (ii) even granting (...) (i). The knowledge argument and the phenomenal concept strategy might have to be modified to make them consistent with social externalism, but not in fundamental or detrimental ways. (shrink)

The knowledge argument aims to refute physicalism, the doctrine that the world is entirely physical. Physicalism is widely accepted in contemporary philosophy. But some doubt that phenomenal consciousness.

The knowledge argument aims to refute physicalism, the view that the world is entirely physical. The argument first establishes the existence of facts about consciousness that are not a priori deducible from the complete physical truth, and then infers the falsity of physicalism from this lack of deducibility. Frank Jackson gave the argument its classic formulation. But now he rejects the argument . On his view, it relies on a false conception of sensory experience, which should be replaced with representationalism (...) , the view that phenomenal states are just representational states. And he argues that mental representation is physically explicable. (shrink)

The titular ‘Mary’ refers to Jackson’s famous protagonist. Her story takes place in the future, when all physical facts have been discovered. This includes “everything in completed physics, chemistry, and neurophysiology, and all there is to know about the causal and relational facts consequent upon all this, including of course functional roles” . Mary learns all this by watching lectures on a monochromatic television monitor. But she spends her life in a black-and-white room and has no color experiences. Then she (...) leaves the room and sees colors for the first time. (shrink)

David Lewis and Laurence Nemirow claim that knowing what an experience is like is knowing-how, not knowing-that. They identify this know-how with the abilities to remember, imagine, and recognize experiences, and Lewis labels their view ‘the Ability Hypothesis’. The Ability Hypothesis has intrinsic interest. But Lewis and Nemirow devised it specifically to block certain anti-physicalist arguments due to Thomas Nagel and Frank Jackson . Does it?

Frank Jackson first presented the Knowledge Argument in "Epiphenomenal Qualia" 1982). The KA is an argument against physicalism, the doctrine that everything is physical. The general thrust of the KA is that physicalism errs by misconstruing or denying the existence of the subjective features of experience. Physicalists have given numerous responses, and the debate continues about whether the KA ultimately succeeds in refuting any or all forms of physicalism. Jackson himself has recently.

Mary learns all the physical facts that one can learn by watching lectures on black-on-white television. According to Jackson, Mary learns new facts when she leaves the room and has color experiences, and that this undermines physicalism. Physicalists have responded by denying the new facts thesis; they argue, she acquires abilities, acquaintance knowledge, or new guises. I argue that the NFT is more plausible than any of the proposed alternatives. I also argue that the NFT does not undermine physicalism unless (...) physicalism entails that all physical facts are discursively learnable, and that the latter entailment is questionable. (shrink)

I wish to consider an objection to Frank Jackson's knowledge argument recently made by Derk Pereboom.

I examine the notion of knowing what an experience or emotion it is like. What kind of knowledge is this? Is it, for example, a species of factual knowledge? If so, what sort of fact is known by someone who possesses this kind of knowledge? ;Knowing what it is like plays a central role in a recent, influential argument, which runs : complete knowledge of the physical facts would fail to provide one with knowledge of what it is like to (...) taste a lemon or see red; therefore, there must be more to such experiences than the events involving only physical phenomena, and so materialism must be false. I argue that this argument involves an ineliminable illicit inference from epistemological premises about how we know about mental and physical events to a metaphysical conclusion about the nature of these events, and that materialism is compatible with the argument's epistemological underpinnings. ;Failure to appreciate this point has led materialists to advance reductionist theories of knowing what it is like, including the theory that it is a species of "ability knowledge" and the theory that it is a species of "acquaintance knowledge". I argue that all such reductionist theories are untenable: someone who does not know what it is like to see red is missing some bona fide factual knowledge about that experience. Given plausible assumptions, it follows that this factual knowledge cannot be acquired by discursive means alone. ;There is a prima facie tension between this "discursive unlearnability" thesis and the plausible idea that the representational resources of our language enable us to speak about that with which we are not directly acquainted, but others with whom we communicate are directly acquainted--an idea that gains support from recent work in semantics by Kripke, Kaplan, Donnellan, and others. I argue that the conflict is only apparent. However, the discursive unlearnability thesis does contradict the widely held view that all facts can be expressed in the language of objective science , and are in principle accessible to any rational creature with an intellectual capacity sufficiently powerful to understand that language. (shrink)

What is the nature of consciousness? How is consciousness related to brain processes? This volume collects thirteen new papers on these topics: twelve by leading and respected philosophers and one by a leading color-vision scientist. All focus on consciousness in the "phenomenal" sense: on what it's like to have an experience. Consciousness has long been regarded as the biggest stumbling block for physicalism, the view that the mind is physical. The controversy has gained focus over the last few decades, and (...) phenomenal knowledge and phenomenal concepts--knowledge of consciousness and the associated concepts--have come to play increasingly prominent roles in this debate. Consider Frank Jackson's famous case of Mary, the super-scientist who learns all the physical information while confined in a black-and-white room. According to Jackson, if physicalism is true, then Mary's physical knowledge should allow her to deduce what it's like to see in color. Yet it seems intuitively clear that she learns something when she leaves the room. But then how can consciousness be physical? Arguably, whether this sort of reasoning is sound depends on how phenomenal concepts and phenomenal knowledge are construed. For example, some argue that the Mary case reveals something about phenomenal concepts but has no implications for the nature of consciousness itself. Are responses along these lines adequate? Or does the problem arise again at the level of phenomenal concepts? The papers in this volume engage with the latest developments in this debate. The authors' perspectives range widely. For example, Daniel Dennett argues that anti-physicalist arguments such as the knowledge argument are simply confused; David Papineau grants that such arguments at least reveal important features of phenomenal concepts; and David Chalmers defends the anti-physicalist arguments, arguing that the "phenomenal concept strategy" cannot succeed. (shrink)

One of the most persuasive objections to the identity thesis.

The encounter of the cognitive apparatus with the phenomenal world had led to the emergence of independent thought processes either based on scientific method of enguiry or on meditative experiences. In the course of time these have developed into a systematized body of knowledge. They purport to provide peace and happiness, but when seduced by power a distorted value structure has been legitimized. The plethora of evidences suggest the 'self' has been incapacitated for long. The scientific experiences have been given (...) supreme status. The paper stresses the need to attain a beginner's mind so that looking within and looking without no longer remain intangible goals of education. The naodalities have been discussed to escape the bonds of conceptual limitations. Finally, it is suggested that this constructive role of optimizing the oppor tunities for formation of intellect, which moves beyond conventional intellectualism, will evolve into a com passionate world-serving intellect, and pave the way for peace and harmony in this turbulent world. (shrink)

Torin Alter (2013) attempts to rescue phenomenal concepts and the knowledge argument from the critique of Ball 2009 by appealing to conceptual mastery. I show that Alter’s appeal fails, and describe general features of conceptual mastery that suggest that no such appeal could succeed.

It has long been widely agreed that some concepts can be possessed only by those who have undergone a certain type of phenomenal experience. Orthodoxy among contemporary philosophers of mind has it that these phenomenal concepts provide the key to understanding many disputes between physicalists and their opponents, and in particular offer an explanation of Mary’s predicament in the situation exploited by Frank Jackson's knowledge argument. I reject the orthodox view; I deny that there are phenomenal concepts. My arguments exploit (...) the sort of considerations that are typically used to motivate externalism about mental content. Although physicalists often appeal to phenomenal concepts to defend their view against the knowledge argument, I argue that this is a mistake. The knowledge argument depends on phenomenal concepts; if there are no phenomenal concepts, then the knowledge argument fails. (shrink)

The book under review is a collection of thirteen essays on the nature phenomenal concepts and the ways in which phenomenal concepts figure in debates over physicalism. Phenomenal concepts are of special interest in a number of ways. First, they refer to phenomenal experiences, and the qualitative character of those experiences whose metaphysical status is hotly debated. There are recent arguments, originating in Descartes’ famous conceivability argument, that purport to show that phenomenal experience is irreducibly non-physical. Second, phenomenal concepts are (...) widely thought to be special and unique among concepts. Both the anti-physicalist arguments and physicalist replies to these arguments turn on views about the nature of phenomenal concepts. In this review I survey the many ways in which the essays in this volume are engaged with anti-physicalist arguments and the role phenomenal concepts play in these arguments. (shrink)

The explicit aim of Daniel Dennett’s new paper ‘What RoboMary Knows’ is to show that Mary will necessarily be able to come to know what it is like to see in colour, if she fully understands all the physical facts about colour vision. I believe we can establish that Dennett’s line of reasoning is flawed, but the flaw is not as simple as an equivocation on ‘knows’. Rather, it goes to the heart of functionalism and hinges on whether or not (...) Dennett is correct to claim that there is ‘no fact of the matter’ about what subjective experience consists in. (shrink)

El libro "E-physicalism - A Physicalist Theory of Phenomenal Consciousness" presenta una teoría en el área de la metafísica de la conciencia fenomenal. Está basada en las convicciones de que la experiencia subjetiva -en el sentido de Nagel - es un fenómeno real, y de que alguna variante del fisicalismo debe ser verdadera.

This work advances a theory in the metaphysics of phenomenal consciousness, which the author labels “e-physicalism”. Firstly, he endorses a realist stance towards consciousness and physicalist metaphysics. Secondly, he criticises Strong AI and functionalist views, and claims that consciousness has an internal character. Thirdly, he discusses HOT theories, the unity of consciousness, and holds that the “explanatory gap” is not ontological but epistemological. Fourthly, he argues that consciousness is not a supervenient but an emergent property, not reducible and endowed with (...) original causal powers, with respect to the micro-constituents of the conscious entity. Fifthly, he addresses the “zombie argument” and the “supervenience argument” within the e-physicalism framework. Finally, he elaborates on the claim that phenomenal properties are physical and discusses the “knowledge argument”. (shrink)

This work advances a theory in the metaphysics of phenomenal consciousness, which the author labels “e-physicalism”. Firstly, he endorses a realist stance towards consciousness and physicalist metaphysics. Secondly, he criticises Strong AI and functionalist views, and claims that consciousness has an internal character. Thirdly, he discusses HOT theories, the unity of consciousness, and holds that the “explanatory gap” is not ontological but epistemological. Fourthly, he argues that consciousness is not a supervenient but an emergent property, not reducible and endowed with (...) original causal powers, with respect to the micro-constituents of the conscious entity. Fifthly, he addresses the “zombie argument” and the “supervenience argument” within the e-physicalism framework. Finally, he elaborates on the claim that phenomenal properties are physical and discusses the “knowledge argument”. (shrink)

Frank Jackson argued, in an astronomically frequently cited paper on 'Epiphenomenal qualia '[Jackson 1982 that materialism must be mistaken. His argument is called the knowledge argument. Over the years since he published that paper, he gradually came to the conviction that the conclusion of the knowledge argument must be mistaken. Yet he long remained totally unconvinced by any of the very numerous published attempts to explain where his knowledge argument had gone astray. Eventually, Jackson did publish a diagnosis of the (...) reasons why, he now thinks, his knowledge argument against materialism fails to prove the falsity of materialism [Jackson 2005. He argues that you can block the knowledge argument against materialism - but only if you tie yourself to a dubious doctrine called representationalism. We argue that the knowledge argument fails as a refutation of either representational or nonrepresentational materialism. It does, however, furnish both materialists and dualists with a successful argument for the existence of distinctively first-person modes of acquaintance with mental states. Jackson's argument does not refute materialism: but it does bring to the surface significant features of thought and experience, which many dualists have sensed, and most materialists have missed. (shrink)

This article assesses the reputation of Mary Somerville in the 1830s and suggests that critical confusion over her status in the changing world of early nineteenth-century science is not new. Drawing on Somerville’s own writings, contemporary newspaper and periodical reviews, political debates and unpublished manuscripts, Somerville's ‘uniqueness’ as a public figure is examined through the eyes of both the nascent scientific community of the time as well as the wider audience for her work. Somerville's status as a popularizer and an (...) educator is more complicated than may have previously been assumed and can be both confirmed and undermined by an analysis of contemporary public opinion. Although her works were directed at the public who indirectly paid her pension for services to science, Somerville's private and published comments about and within her writings offer an alternative interpretation. Despite an apparent turn to more popular works in order to bolster her finances, Mary Somerville relished the specialist aspect of her writings and valued the difficulties which prevented the ordinary reader from obtaining ultimate insight into celestial mechanics. (shrink)

In this paper I argue that a priori arguments fail to present any real problem for physicalism. They beg the question against physicalism in the sense that the argument will only seem compelling if one is already assuming that qualitative properties are nonphysical. To show this I will present the reverse-zombie and reverse-knowledge arguments. The only evidence against physicalism is a priori arguments, but there are also a priori arguments against dualism of exactly the same variety. Each of these parity (...) arguments has premises that are just as intuitively plausible, and it cannot be the case that both the traditional scenarios and the reverse-scenarios are all ideally conceivable. Given this one set must be merely prima facie conceivable and only empirical methods will tell us which is which. So, by the time a priori methodology will be of any use it will be too late. (shrink)