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David John Chalmers (; born 20 April 1966) "The Thinking Ape: The Enigma of Human Consciousness", via YouTube is an Australian philosopher and cognitive scientist, specializing in philosophy of mind and philosophy of language. He is a professor of philosophy and neural science at New York University (NYU), as well as co-director of NYU's Center for Mind, Brain and Consciousness (along with Ned Block). In 2006, he was elected a fellow of the Australian Academy of the Humanities. In 2013, he was elected as a fellow of the American Academy of Arts and Sciences.
Chalmers is best known for formulating the hard problem of consciousness, and for popularizing the philosophical zombie thought experiment.
Chalmers and David Bourget co-founded PhilPapers; a database of journal articles for philosophers.
As a child, he experienced synesthesia. He began coding and playing Video game at the age of 10 on a PDP-10 at a medical center. He also performed exceptionally in mathematics, and secured a bronze medal in the International Mathematical Olympiad. When Chalmers was 13, he read Douglas Hofstadter's 1979 book Gödel, Escher, Bach, which awakened an interest in philosophy.
Chalmers received his undergraduate degree in pure mathematics from the University of Adelaide. After graduating, Chalmers spent six months reading philosophy books while hitchhiking across Europe, before continuing his studies at the University of Oxford, where he was a Rhodes Scholar but eventually withdrew from the course.
In 1993, Chalmers received his PhD in philosophy and cognitive science from Indiana University Bloomington under Douglas Hofstadter, writing a doctoral thesis entitled Toward a Theory of Consciousness. 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.
Having established his reputation, Chalmers received his first professorship at UC Santa Cruz, from August 1995 to December 1998. In 1996 he published the widely cited book The Conscious Mind. Chalmers was subsequently appointed Professor of Philosophy (1999–2004) and then Director of the Center for Consciousness Studies (2002–2004) at the University of Arizona. In 2004, Chalmers returned to Australia, encouraged by an ARC Federation Fellowship, becoming professor of philosophy and director of the Center for Consciousness at the Australian National University. Chalmers accepted a part-time professorship at the philosophy department of New York University in 2009, becoming a full-time professor in 2014.
In 2013, Chalmers was elected a Fellow of the American Academy of Arts & Sciences. He is an editor on topics in the philosophy of mind for the Stanford Encyclopedia of Philosophy. In May 2018, it was announced that he would serve on the jury for the Berggruen Prize.
In 2023, Chalmers won a bet—made in 1998, for a case of wine—with neuroscientist Christof Koch that the neural underpinnings for consciousness would not be resolved by the year 2023, while Koch had bet that they would.
In support of this, Chalmers is famous for his commitment to the logical (though, not natural) possibility of philosophical zombies. These zombies 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; the facts about them are further facts. 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. 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. According to Chalmers, his arguments are similar to a line of thought that goes back to Leibniz's 1714 "mill" argument; the first substantial use of philosophical "zombie" terminology may be Robert Kirk's 1974 "Zombies vs. Materialists".
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.
With Andy Clark, Chalmers has written "The Extended Mind", an article about the borders of the mind. consc.net Analysis 58:10-23, 1998. Reprinted in The Philosopher's Annual, 1998.
According to Chalmers, systems that have the same functional organization "at a fine enough grain" (that are "functionally Isomorphism") will have "qualitatively identical conscious experiences". In 1995, he proposed the reductio ad absurdum "fading qualia" thought experiment. It involves progressively replacing each neuron of a brain with a functional equivalent, for example implemented on a silicon chip. Since each substitute neuron performs the same function as the original, the subject would not notice any change. But, Chalmers argues, if qualia (for example, the perceived color of objects) were to fade or disappear, the brain's holder could notice the difference, which would alter the information processing in the brain, leading to a contradiction. He concludes that such fading qualia are impossible in practice, and that after each neuron is replaced, the resulting functionally isomorphic robotic brain would be as conscious as the original biological one. In addition, Chalmers proposed a similar thought experiment, "dancing qualia", which concludes that a robotic brain that is functionally isomorphic to a biological one would not only be as conscious, but would also have the same conscious experiences (e.g., the same perception of color when seeing an object). In 2023, he analyzed whether large language models could be conscious, and suggested that they were probably not conscious, but could become serious candidates for consciousness within a decade.
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 a name does not have a sense, or, at least, does not have a sense which is rich enough to play the reference-determining role. Moreover, a 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 any scientific identity statement such as "Water is H2O" is also a necessary statement, i.e. true in all possible worlds. Kripke thinks that this is a phenomenon that descriptivism cannot explain.
And, as also proposed by Hilary Putnam and Kripke himself, Kripke's view on names can also be applied to the reference of natural kind terms. The kind of theory of reference that is advocated by Kripke and Putnam is called the direct reference theory.
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 "the substance with water-like properties". The entity identified by this intension could vary in different hypothetical worlds. In the twin Earth thought experiment, for example, inhabitants might use "water" to mean their equivalent of water, even if its chemical composition is not H2O. Thus, for that world, "water" does not refer to H2O.
The secondary intension of "water" is whatever "water" refers to in this world. When considered according to its secondary intension, water means H2O in every world. Through this concept, Chalmers provides a way to explain how reference is determined by distinguishing between epistemic possibilities (primary intension) and metaphysical necessities (secondary intension), ensuring that the referent (H2O) is uniquely identified across all metaphysically possible worlds.
Chalmers proposes that computers are forming a form of "exo-cortex", where a part of human cognition is 'outsourced' to corporations such as Apple and Google.
Chalmers was featured in the 2012 documentary film entitled The Singularity by filmmaker Doug Wolens, which focuses on the theory proposed by techno-futurist Ray Kurzweil, of that "point in time when computer intelligence exceeds human intelligence." He was a featured philosopher in the 2020 Daily Nous series on GPT-3, which he described as "one of the most interesting and important AI systems ever produced."
Chalmers was the lead singer of the [[Zombie Blues]] band, which performed at the music festival [[Qualia Fest]] in 2012 in New York.
Regarding religion, Chalmers said in 2011: "I have no religious views myself and no spiritual views, except watered-down humanistic spiritual views. And consciousness is just a fact of life. It's a natural fact of life".
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