David Chalmers

David Chalmers
David John Chalmers
Full name David John Chalmers
Born 20 April 1966
Era Contemporary philosophy
Region Western philosophy
School Analytic
Main interests Philosophy of mind
Philosophy of language
Notable ideas Hard problem of consciousness; property dualism; neutral monism; extended mind; two-dimensional semantics

David John Chalmers (born 20 April 1966) is an Australian philosopher specializing in the area of philosophy of mind and philosophy of language, whose recent work concerns verbal disputes. He is Professor of Philosophy and Director of the Centre for Consciousness at the Australian National University. He is also Visiting Professor of Philosophy at New York University.[1]



Chalmers was born and raised in Australia, and since 2004 has been Professor of Philosophy, Director of the Centre for Consciousness, and an ARC Federation Fellow at the Australian National University. From an early age, he excelled at mathematics, eventually completing his undergraduate education at the University of Adelaide with a Bachelor's degree in mathematics and computer science. He then briefly studied at Lincoln College at the University of Oxford as a Rhodes Scholar before studying for his PhD at Indiana University Bloomington under Douglas Hofstadter. He was a postdoctoral fellow in the Philosophy-Neuroscience-Psychology program directed by Andy Clark at Washington University in St. Louis from 1993 to 1995, and his first professorship was at UC Santa Cruz, from August 1995 to December 1998. Chalmers was subsequently appointed Professor of Philosophy (1999–2004) and, later, Director of the Center for Consciousness Studies (2002–2004) at the University of Arizona, sponsor of the Toward a Science of Consciousness[2] conference where he made his legendary "debut" in 1994.[3]

Chalmers's book, The Conscious Mind (1996), is widely considered (by both advocates and opponents) to be an essential work on consciousness and its relation to the mind-body problem in philosophy of mind.[4] In the book, Chalmers argues that all forms of physicalism (whether reductive or non-reductive) that have dominated modern philosophy and science fail to account for the existence (that is, presence in reality) of consciousness itself. He proposes an alternative dualistic view he calls naturalistic dualism (but which might also be characterized by more traditional formulations such as property dualism, neutral monism, or double-aspect theory). The book was described by The Sunday Times as "one of the best science books of the year".[5]


Philosophy of mind

Chalmers is best known for his formulation of the notion of a hard problem of consciousness in both his book and in the paper "Facing Up to the Problem of Consciousness" (originally published in The Journal of Consciousness Studies, 1995). He makes the distinction between "easy" problems of consciousness, such as explaining object discrimination or verbal reports, and the single hard problem, which could be stated "why does the feeling which accompanies awareness of sensory information exist at all?" He expressed this distinction at the first Tucson Conference in 1994. The essential difference between the (cognitive) easy problems and the (phenomenal) hard problem is that the former are at least theoretically answerable via the standard strategy in philosophy of mind: functionalism. Chalmers argues for an "explanatory gap" from the objective to the subjective, and criticizes physical explanations of mental experience, making him (for some) a dualist.

In support of this, Chalmers is famous for his commitment to the logical (though, importantly, not natural) possibility of philosophical zombies, although he was not the first to propose the thought experiment. These zombies, unlike the zombie of popular fiction, are complete physical duplicates of human beings, lacking only qualitative experience. Chalmers argues that since such zombies are conceivable to us, they must therefore be logically possible. Since they are logically possible, then qualia and sentience are not fully explained by physical properties alone. Instead, Chalmers argues that consciousness is a fundamental property ontologically autonomous of any known (or even possible) physical properties, and that there may be lawlike rules which he terms "psychophysical laws" that determine which physical systems are associated with which types of qualia. However, he rejects Cartesian-style interactive dualism in which the mind has the power to alter the behavior of the brain, suggesting instead that the physical world is "causally closed" so that physical events only have physical causes, so that for example human behavior could be explained entirely in terms of the functions of the physical brain. He further speculates that all information-bearing systems may be conscious, leading him to entertain the possibility of conscious thermostats and a qualified panpsychism he calls panprotopsychism. Chalmers maintains a formal agnosticism on the issue, even conceding that the viability of panpsychism places him at odds with the majority of his contemporaries.

After the publication of Chalmers's landmark paper, more than twenty papers in response were published in the Journal of Consciousness Studies. These papers (by Daniel Dennett, Colin McGinn, Francisco Varela, Francis Crick, and Roger Penrose, among others) were collected and published in the book Explaining Consciousness: The Hard Problem. John Searle critiqued Chalmers's views in The New York Review of Books.[6]

With Andy Clark Chalmers has written The Extended Mind, an article about the borders of the mind.[7]

Philosophy of language

Chalmers is also an important contributor to the philosophy of language. In this area, his contribution mainly focuses on the theory of reference, being concerned with how words secure their referents. He, together with others such as Frank Jackson, proposes a kind of theory called two dimensionalism arguing against Saul Kripke. Before Kripke delivered the famous lecture series Naming and Necessity in 1970, the descriptivism advocated by Gottlob Frege and Bertrand Russell was the orthodoxy. Descriptivism suggests that a name is indeed an abbreviation of a description, which is a set of properties or, as later modified by John Searle, a disjunction of properties. This name secures its reference by a process of properties fitting: whichever object fits the description most, then it is the referent of the name. Therefore, the description is seen as the connotation, or, in Fregean term, the sense of the name, and it is via which the denotation of the name is determined.

However, as Kripke argued in Naming and Necessity, a name does not secure its reference via any process of description fitting. Rather, a name determines its reference via a historical-causal link tracing back to the process of naming. And thus, Kripke thinks that name does not have sense, or, at least, does not have sense which is rich enough to play the reference-determining role. Moreover, name, in Kripke's view, is a rigid designator, which refers to the same object in all possible worlds. Following this line of thought, Kripke suggests that all the scientific identity statement like "Water is H2O" is also a necessary statement, i.e. true in all possible worlds. Kripke thinks that this is a phenomenon that the descriptivist cannot explain.

And, as also proposed by Hilary Putnam and Kripke himself, Kripke's view on name can also be applied to the reference of natural kind term. The kind of theory of reference that is advocated by Kripke and Putnam is called the direct reference theory.

However, Chalmers disagree with Kripke, and all the direct reference theorists in general. He thinks that there are two kind of intension of a natural kind term, a stance which is now called two dimensionalism. For example, the words,

"Water is H2O"

are taken to express two distinct propositions, often referred to as a primary intension and a secondary intension, which together compose its meaning.[8]

The primary intension of a word or sentence is its sense, i.e., is the idea or method by which we find its referent. The primary intension of "water" might be a description, such as watery stuff. The thing picked out by the primary intension of "water" could have been otherwise. For example, on some other world where the inhabitants take "water" to mean watery stuff, but where the chemical make-up of watery stuff is not H2O, it is not the case that water is H2O for that world.

The secondary intension of "water" is whatever thing "water" happens to pick out in this world, whatever that world happens to be. So if we assign "water" the primary intension watery stuff then the secondary intension of "water" is H2O, since H2O is watery stuff in this world. The secondary intension of "water" in our world is H2O, and is H2O in every world because unlike watery stuff it is impossible for H2O to be other than H2O. When considered according to its secondary intension, water means H2O in every world. Via this secondary intension, Chalmers proposes a way to explain the necessity of the identity statement on one hand, and reserve the role of intension/sense in determining the reference, in the other hand.

Verbal disputes

In recent important work, Chalmers has concentrated on verbal disputes.[9] He argues that a dispute is best characterized as "verbal" when it concerns some sentence S which contains a term T such that (i) the parties to the dispute disagree over the meaning of T, and (ii) the dispute arises solely because of this disagreement. In the same work, Chalmers describes novel procedures for the resolution of verbal disputes. One of these he calls the "elimination method", which involves eliminating the contentious term and observing whether any dispute remains.


On his web site, Chalmers has compiled a large bibliography on the philosophy of mind and related fields with several thousand annotated entries topically organized.

Chalmers appears in the video documentary "The Roots of the Matrix" (a reference to The Matrix) and presents a novel take on a large part of the "brain in a vat" hypothesis, maintaining that it is not, contrary to common philosophical opinion, a skeptical hypothesis.

He serves on the editorial board of the journals Philo, Consciousness and Cognition, the Journal of Consciousness Studies, and Psyche.

He is also noted for originating the (philosophical) zombie blues[10] and recently performed as part of the New York Consciousness Collective at the Qualia Fest held December 14, 2010 in New York.[11]

See also

  • PhilPapers


  1. ^ philosophy.fas.nyu.edu
  2. ^ consciousness.arizona.edu
  3. ^ consc.net
  4. ^ consc.net
  5. ^ The Conscious Mind: In Search of a Fundamental Theory (1996), paperback edition, back cover.
  6. ^ Searle's review of The Conscious Mind 6 March 1997 (subscription required)
    Chalmers' response to Searle and Searle's reply 15 May 1997 (free access)
  7. ^ consc.net Analysis 58:10-23, 1998. Reprinted in The Philosopher's Annual, 1998.
  8. ^ for a fuller explanation see Chalmers, David. The Conscious Mind. Oxford UP: 1996. Chapter 2, section 4.
  9. ^ consc.net Philosophical Review, 120:4, 2011.
  10. ^ youtube.com
  11. ^ youtube.com


A partial list of publications by Chalmers:

External links

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