Douglas Richard Hofstadter (born February 15, 1945) is an American professor of cognitive science whose research focuses on the sense of self in relation to the external world, consciousness, analogy-making, artistic creation, literary translation, and discovery in mathematics and physics. Hofstadter's book Gödel, Escher, Bach: An Eternal Golden Braid, first published in 1979, won both the Pulitzer Prize for general non-fiction and a National Book Award (at that time called The American Book Award) for Science.[a] His 2007 book I Am a Strange Loop won the Los Angeles Times Book Prize for Science and Technology.
Hofstadter in Bologna, Italy, in 2002
Douglas Richard Hofstadter
February 15, 1945
New York City, United States
|Education||Stanford University (BSc)|
University of Oregon (PhD)
|Known for||Gödel, Escher, Bach|
I Am a Strange Loop
|Spouse(s)||Carol Ann Brush (1985–1993; her death; 2 children)|
Baofen Lin (2012–present)
|Awards||National Book Award|
Member of the American Academy of Arts and Sciences
Philosophy of mind
University of Oregon
University of Michigan
|Thesis||The Energy Levels of Bloch Electrons in a Magnetic Field (1974)|
|Doctoral advisor||Gregory Wannier|
|Doctoral students||David Chalmers|
Robert M. French
Scott A. Jones
He is the son of Robert Hofstadter.
Early life and educationEdit
Hofstadter was born in New York City, the son of Nobel Prize-winning physicist Robert Hofstadter and Nancy Givan Hofstadter. He grew up on the campus of Stanford University, where his father was a professor, and he attended the International School of Geneva in 1958–1959. He graduated with Distinction in Mathematics from Stanford University in 1965, and received his Ph.D. in Physics from the University of Oregon in 1975, where his study of the energy levels of Bloch electrons in a magnetic field led to his discovery of the fractal known as the Hofstadter butterfly.
Since 1988, Hofstadter has been the College of Arts and Sciences Distinguished Professor of Cognitive Science and Comparative Literature at Indiana University in Bloomington, where he directs the Center for Research on Concepts and Cognition which consists of himself and his graduate students, forming the "Fluid Analogies Research Group" (FARG). He was initially appointed to the Indiana University's Computer Science Department faculty in 1977, and at that time he launched his research program in computer modeling of mental processes (which at that time he called "artificial intelligence research", a label that he has since dropped in favor of "cognitive science research"). In 1984, he moved to the University of Michigan in Ann Arbor, where he was hired as a professor of psychology and was also appointed to the Walgreen Chair for the Study of Human Understanding. In 1988 he returned to Bloomington as "College of Arts and Sciences Professor" in both cognitive science and computer science. He was also appointed adjunct professor of history and philosophy of science, philosophy, comparative literature, and psychology, but has said that his involvement with most of those departments is nominal. In 1988 Hofstadter received the In Praise of Reason award, the Committee for Skeptical Inquiry's highest honor. In April 2009 he was elected a Fellow of the American Academy of Arts and Sciences and a member of the American Philosophical Society. In 2010 he was elected a member of the Royal Society of Sciences in Uppsala, Sweden.
At the University of Michigan and Indiana University, he co-authored, with Melanie Mitchell, a computational model of "high-level perception" – Copycat – and several other models of analogy-making and cognition, including the Tabletop project, co-developed with Robert M. French. Hofstadter's doctoral student James Marshall subsequently extended the Copycat project under the name "Metacat". The Letter Spirit project, implemented by Gary McGraw and John Rehling, aims to model the act of artistic creativity by designing stylistically uniform "gridfonts" (typefaces limited to a grid). Other more recent models include Phaeaco (implemented by Harry Foundalis) and SeqSee (Abhijit Mahabal), which model high-level perception and analogy-making in the microdomains of Bongard problems and number sequences, respectively, as well as George (Francisco Lara-Dammer), which models the processes of perception and discovery in triangle geometry.
The pursuit of beauty has driven Hofstadter both inside and outside his professional work. He seeks beautiful mathematical patterns, beautiful explanations, beautiful typefaces, beautiful sonic patterns in poetry, etc. Hofstadter has said of himself, "I'm someone who has one foot in the world of humanities and arts, and the other foot in the world of science." He has had several exhibitions of his artworks in various university art galleries. These shows have featured large collections of his gridfonts, his ambigrams (pieces of calligraphy created with two readings, either of which is usually obtained from the other by rotating or reflecting the ambigram, but sometimes simply by "oscillation", like the Necker Cube or the rabbit/duck figure of Joseph Jastrow), and his "Whirly Art" (music-inspired visual patterns realized using shapes based on various alphabets from India). (Hofstadter invented the term "ambigram" in 1984; many ambigrammists all over the world have since taken up the concept.)
Hofstadter collects and studies cognitive errors (largely, but not solely, speech errors), "bon mots" (spontaneous humorous quips), and analogies of all sorts, and his long-time observation of these diverse products of cognition, and his theories about the mechanisms that underlie them, have exerted a powerful influence on the architectures of the computational models developed by himself and FARG members.
All FARG computational models share certain key principles, including:
- that human thinking is carried out by thousands of independent small actions in parallel, biased by the concepts that are currently activated
- that activation spreads from activated concepts to less activated "neighbor concepts"
- that there is a "mental temperature" that regulates the degree of randomness in the parallel activity
- that promising avenues tend to be explored more rapidly than unpromising ones
FARG models also have an overarching philosophy that all cognition is built from the making of analogies. The computational architectures that share these precepts are called "active symbols" architectures.
Hofstadter's thesis about consciousness, first expressed in Gödel, Escher, Bach (GEB) but also present in several of his later books, is that it is an emergent consequence of seething lower-level activity in the brain. In GEB he draws an analogy between the social organization of a colony of ants and the mind seen as a coherent "colony" of neurons. In particular, Hofstadter claims that our sense of having (or being) an "I" comes from the abstract pattern he terms a "strange loop", which is an abstract cousin of such concrete phenomena as audio and video feedback, and which Hofstadter has defined as "a level-crossing feedback loop". The prototypical example of this abstract notion is the self-referential structure at the core of Gödel's incompleteness theorems. Hofstadter's 2007 book I Am a Strange Loop carries his vision of consciousness considerably further, including the idea that each human "I" is distributed over numerous brains, rather than being limited to precisely one brain.
Hofstadter's writing is characterized by an intense interaction between form and content, as exemplified by the 20 dialogues in GEB, many of which simultaneously talk about and imitate strict musical forms used by Bach, such as canons and fugues. Most of Hofstadter's books feature some kind of structural alternation: in GEB between dialogues and chapters, in The Mind's I between selections and reflections, in Metamagical Themas between Chapters and Postscripts, and so forth. Both in his writing and in his teaching, Hofstadter stresses the concrete, constantly using examples and analogies, and avoids the abstract. Typical of the courses he teaches is his seminar "Group Theory and Galois Theory Visualized", in which abstract mathematical ideas are rendered as concretely as possible. He puts great effort into making ideas clear and visual, and asserts that when he teaches, if his students do not understand something, it is never their fault but always his own.
Hofstadter is passionate about languages. In addition to English, his mother tongue, he speaks French and Italian fluently (the language spoken at home with his children is Italian). At various times in his life, he has studied (in descending order of level of fluency reached) German, Russian, Spanish, Swedish, Mandarin, Dutch, Polish, and Hindi. His love of sounds pushes him to strive to minimize, and ideally get rid of, any foreign accent.
Le Ton beau de Marot: In Praise of the Music of Language is a long book devoted to language and translation, especially poetry translation, and one of its leitmotifs is a set of some 88 translations of "Ma Mignonne", a highly constrained poem by 16th-century French poet Clément Marot. In this book, Hofstadter jokingly describes himself as "pilingual" (meaning that the sum total of the varying degrees of mastery of all the languages that he's studied comes to 3.14159 ...), as well as an "oligoglot" (someone who speaks "a few" languages).
In 1999, the bicentennial year of Russian poet and writer Alexander Pushkin, Hofstadter published a verse translation of Pushkin's classic novel-in-verse Eugene Onegin. Hofstadter has translated many other poems too (always respecting their formal constraints), and two novels (in prose): La Chamade (That Mad Ache) by French writer Françoise Sagan, and La Scoperta dell'Alba (The Discovery of Dawn) by Walter Veltroni, the then head of the Partito Democratico in Italy. The Discovery of Dawn was published in 2007, and That Mad Ache was published in 2009, bound together with Hofstadter's essay Translator, Trader: An Essay on the Pleasantly Pervasive Paradoxes of Translation.
Hofstadter's former Ph.D. students include (with dissertation title):
- Donald Byrd—Music Notation by Computer
- David Chalmers—Toward a Theory of Consciousness
- Gray A. Clossman—A Model of Categorization and Learning in a Connectionist Broadcast System
- Hamid Ekbia—AI Dreams and Discourse: Science and Engineering in Tension
- Harry Foundalis—Phaeaco: A Cognitive Architecture Inspired by Bongard's Problems
- Bob French—Tabletop: An Emergent, Stochastic Model of Analogy-Making
- Francisco Lara-Dammer—Modeling Human Discoverativity in Geometry
- Abhijit Mahabal—SeqSee: A Concept-centered Architecture for Sequence Perception
- Jim Marshall—Metacat: A Self-Watching Cognitive Architecture for Analogy-making and High level Perception
- Gary McGraw—Letter Spirit (Part One): Emergent High-level Perception of Letters Using Fluid Concepts
- Marsha Meredith—Seek-Whence: A Model of Pattern Perception
- Eric Nichols—Musicat: A Computer Model of Musical Listening and Analogy-Making
- Melanie Mitchell—Copycat: A Computer Model of High-Level Perception and Conceptual Slippage in Analogy-making
- John Rehling—Letter Spirit (Part Two): Modeling Creativity in a Visual Domain
- Wang Pei (Pei Wang)—Non-Axiomatic Reasoning System: Exploring the Essence of Intelligence
- William York—Aesthetics and the Scope and Limits of Cognitive Science
Hofstadter has said that he feels "uncomfortable with the nerd culture that centers on computers". He admits that "a large fraction [of his audience] seems to be those who are fascinated by technology", but when it was suggested that his work "has inspired many students to begin careers in computing and artificial intelligence" he replied that he was pleased about that, but that he himself has "no interest in computers". In that interview he also mentioned a course he has twice given at Indiana University, in which he took a "skeptical look at a number of highly-touted AI projects and overall approaches". For example, upon the defeat of Garry Kasparov by Deep Blue, he commented that "It was a watershed event, but it doesn't have to do with computers becoming intelligent". Hofstadter's disinterest with computers is analogous to an astronomer's disinterest with telescopes. In his book Metamagical Themas, he says that "in this day and age, how can anyone fascinated by creativity and beauty fail to see in computers the ultimate tool for exploring their essence?".
Provoked by predictions of a technological singularity (a hypothetical moment in the future of humanity when a self-reinforcing, runaway development of artificial intelligence causes a radical change in technology and culture), Hofstadter has both organized and participated in several public discussions of the topic. At Indiana University in 1999 he organized such a symposium, and in April 2000, he organized a larger symposium entitled "Spiritual Robots" at Stanford University, in which he moderated a panel consisting of Ray Kurzweil, Hans Moravec, Kevin Kelly, Ralph Merkle, Bill Joy, Frank Drake, John Holland and John Koza. Hofstadter was also an invited panelist at the first Singularity Summit, held at Stanford in May 2006. Hofstadter expressed doubt about the likelihood of the singularity coming to pass in the foreseeable future.
When Martin Gardner retired from writing his "Mathematical Games" column for Scientific American magazine, Hofstadter succeeded him in 1981–1983 with a column entitled Metamagical Themas (an anagram of "Mathematical Games"). An idea he introduced in one of these columns was the concept of "Reviews of This Book", a book containing nothing but cross-referenced reviews of itself which has an online implementation. One of Hofstadter's columns in Scientific American concerned the damaging effects of sexist language, and two chapters of his book Metamagical Themas are devoted to that topic, one of which is a biting analogy-based satire entitled "A Person Paper on Purity in Language" (1985), in which the reader's presumed revulsion at racism and racist language is used as a lever to motivate an analogous revulsion at sexism and sexist language; Hofstadter published it under the pseudonym William Satire, an allusion to William Safire. Another column reported on the discoveries made by University of Michigan professor Robert Axelrod in his computer tournament pitting many iterated prisoner's dilemma strategies against each other, and a follow-up column discussed a similar tournament that Hofstadter and his graduate student Marek Lugowski organized. The "Metamagical Themas" columns ranged over many themes, and included, to name just three, one on patterns in Frédéric Chopin's piano music (particularly the études), another on the concept of superrationality (choosing to cooperate when the other party/adversary is assumed to be equally intelligent as oneself), and one on the self-modifying game of Nomic, based on the way in which the legal system modifies itself, and developed by philosopher Peter Suber.
Hofstadter was married to Carol Ann Brush until her death. They met in Bloomington, and married in Ann Arbor in 1985. They had two children, Danny and Monica. Carol died in 1993 from the sudden onset of a brain tumor – glioblastoma multiforme – when their children were five and two. The Carol Ann Brush Hofstadter Memorial Scholarship for Bologna-bound Indiana University students was established in 1996 in her name. Hofstadter's book Le Ton beau de Marot is dedicated to their two children and its dedication reads "To M. & D., living sparks of their Mommy's soul".
Hofstadter has composed numerous pieces for piano, and a few for piano and voice. He created an audio CD with the title DRH/JJ, which includes all these compositions performed primarily by pianist Jane Jackson, but with a few performed by Brian Jones, Dafna Barenboim, Gitanjali Mathur and himself.
The dedication for I Am A Strange Loop is: "To my sister Laura, who can understand, and to our sister Molly, who cannot." Hofstadter explains in the preface that his younger sister Molly never developed the ability to speak or understand language.
As a consequence of his attitudes about consciousness and empathy, Hofstadter has been a vegetarian for roughly half his life.
In popular cultureEdit
In the 1982 novel 2010: Odyssey Two, Arthur C. Clarke's first sequel to 2001: A Space Odyssey, HAL 9000 is described by Dr. Chandra as being caught in a "Hofstadter–Möbius loop". The movie uses the term "H. Möbius loop".
The books published by Hofstadter are (the ISBNs refer to paperback editions, where available):
- Gödel, Escher, Bach: an Eternal Golden Braid (ISBN 0-465-02656-7) (1979)
- Metamagical Themas (ISBN 0-465-04566-9) (collection of Scientific American columns and other essays, all with postscripts)
- Ambigrammi: un microcosmo ideale per lo studio della creatività (ISBN 88-7757-006-7) (in Italian only)
- Fluid Concepts and Creative Analogies (co-authored with several of Hofstadter's graduate students) (ISBN 0-465-02475-0)
- Rhapsody on a Theme by Clement Marot (ISBN 0-910153-11-6) (1995, published 1996; volume 16 of series The Grace A. Tanner Lecture in Human Values)
- Le Ton beau de Marot: In Praise of the Music of Language (ISBN 0-465-08645-4)
- Eugene Onegin: A Novel Versification (ISBN 0-465-02094-1)
- I Am a Strange Loop (ISBN 0-465-03078-5) (2007)
- The Discovery of Dawn (ISBN 978-0-8478-3109-8) (2007) (a translation of a novel by Walter Veltroni)
- That Mad Ache, co-bound with Translator, Trader: An Essay on the Pleasantly Pervasive Paradoxes of Translation (ISBN 978-0-465-01098-1) (2009)
- Surfaces and Essences: Analogy as the Fuel and Fire of Thinking, co-authored with Emmanuel Sander (ISBN 0-465-01847-5) (first published in French as L'Analogie. Cœur de la pensée; published in English in the US in April 2013)
Hofstadter has written, among many others, the following papers:
- "Energy levels and wave functions of Bloch electrons in rational and irrational magnetic fields", Phys. Rev. B 14 (1976) 2239.
- "A non-deterministic approach to analogy, involving the Ising model of ferromagnetism", in Eduardo Caianiello (ed.), The Physics of Cognitive Processes. Teaneck, NJ: World Scientific, 1987.
- "To Err is Human; To Study Error-making is Cognitive Science" (co-authored by David J. Moser), Michigan Quarterly Review, Vol. XXVIII, No. 2, 1989, pp. 185–215.
- "Speechstuff and thoughtstuff: Musings on the resonances created by words and phrases via the subliminal perception of their buried parts", in Sture Allen (ed.), Of Thoughts and Words: The Relation between Language and Mind. Proceedings of the Nobel Symposium 92, London/New Jersey: World Scientific Publ., 1995, 217–267.
- "On seeing A's and seeing As", Stanford Humanities Review Vol. 4, No. 2 (1995) pp. 109–121.
- "Analogy as the Core of Cognition", in Dedre Gentner, Keith Holyoak, and Boicho Kokinov (eds.) The Analogical Mind: Perspectives from Cognitive Science, Cambridge, MA: The MIT Press/Bradford Book, 2001, pp. 499–538.
Involvement in other booksEdit
Hofstadter has written forewords for or edited the following books:
- The Mind's I: Fantasies and Reflections on Self and Soul (co-edited with Daniel Dennett) (ISBN 0-465-03091-2 and ISBN 0-553-01412-9) (ISBN 0-553-34584-2) 1981
- Sparse Distributed Memory by Pentti Kanerva (Bradford Books/MIT Press, 1988). (ISBN 0-262-11132-2)
- Are Quanta Real? A Galilean Dialogue by J.M. Jauch (ISBN 0-253-20545-X) 1989 Indiana University Press; Hofstadter wrote the foreword.
- Alan Turing: The Enigma by Andrew Hodges. (Preface)
- Gödel's Proof (2002 revised edition) by Ernest Nagel and James R. Newman, edited by Hofstadter (ISBN 0-8147-5816-9). In the foreword, Hofstadter explains that the book (originally published in 1958) exerted a profound influence on him when he was young.
- Who invented the computer? The legal battle that changed computing history. (2003) by Alice Rowe Burks. Hofstadter wrote the foreword.
- Alan Turing: Life and Legacy of a Great Thinker by Christof Teuscher (Editor)
- Jason Salavon: Brainstem Still Life (ISBN 981-05-1662-2) 2004 (Introduction)
- Masters of Deception: Escher, Dalí & the Artists of Optical Illusion 2004 by Al Seckel. Hofstadter wrote the foreword.
- King of Infinite Space: Donald Coxeter, the Man Who Saved Geometry by Siobhan Roberts, Walker and Company, 2006. Hofstadter wrote the foreword.
- Hofstadter, Douglas R. (2008). I Am a Strange Loop. New York: Basic Books. ISBN 0-465-03079-3.
- Hofstadter, Douglas Richard (1974). The Energy Levels of Bloch Electrons in a Magnetic Field (PhD thesis). University of Oregon.
- Hofstadter, D. R. (1982). "Who shoves whom around inside the careenium? Or what is the meaning of the word ?I??". Synthese. 53 (2): 189–218. doi:10.1007/BF00484897.
- "General Nonfiction" Archived March 26, 2012, at WebCite. Past winners and finalists by category. The Pulitzer Prizes. Retrieved March 17, 2012.
- A bedside book of paradoxes Archived March 26, 2017, at the Wayback Machine., New York Times
- "National Book Awards – 1980" Archived August 13, 2014, at the Wayback Machine.. National Book Foundation. Retrieved March 7, 2012.
- Book Prizes – Los Angeles Times Festival of Books» Winners By Award Archived April 5, 2013, at the Wayback Machine.. Events.latimes.com (November 22, 1963). Retrieved on 2013-10-06.
- Douglas Hofstadter at DBLP Bibliography Server
- Douglas Hofstadter's publications indexed by the Scopus bibliographic database. (subscription required)
- Stanford News Service,Nancy Hofstadter, widow of Nobel laureate in physics, dead at 87 Archived March 24, 2012, at the Wayback Machine., August 17, 2007.
- Hofstadter, Douglas (1976). "Energy levels and wave functions of Bloch electrons in rational and irrational magnetic fields". Physical Review B. 14 (6): 2239. doi:10.1103/PhysRevB.14.2239.
- "Center for Research on Concepts and Cognition: Indiana University Bloomington". Archived from the original on April 11, 2018. Retrieved April 30, 2016.
- IU pages as faculty Archived December 31, 2003, at the Wayback Machine., IU distinguished faculty Archived February 25, 2004, at the Wayback Machine. (see this announcement Archived December 16, 2007, at the Wayback Machine. on March 21, 2007) and as speaker Archived December 16, 2007, at the Wayback Machine.
- A Day in the Life of ... Douglas Hofstadter Archived December 30, 2007, at the Wayback Machine. 2004
- Seminar: AI: Hope and Hype Archived June 6, 2007, at the Wayback Machine. 1999
- Shore, Lys Ann (1988). "New Light on the New Age CSICOP's Chicago conference was the first to critically evaluate the New Age movement". The Skeptical Inquirer. 13 (3): 226–235.
- "American Academy of Arts & Sciences". Archived from the original on July 28, 2012. Retrieved April 30, 2016.
- "Home - American Philosophical Society". Archived from the original on April 29, 2016. Retrieved April 30, 2016.
- Center for Research on Concepts and Cognition: Indiana University Bloomington Archived June 26, 1997[Date mismatch], at the Wayback Machine.. Cogsci.indiana.edu. Retrieved on October 6, 2013.
- An overview of Metacat Archived August 18, 2007, at the Wayback Machine. 2003
- By Analogy: A talk with the most remarkable researcher in artificial intelligence today, Douglas Hofstadter, the author of Gödel, Escher, Bach Archived December 9, 2013, at the Wayback Machine. Wired Magazine, November 1995
- Analogy as the Core of Cognition Archived April 11, 2008, at the Wayback Machine. Review of Stanford lecture, February 2, 2006
- Center for Research on Concepts and Cognition Archived May 26, 2010, at the Wayback Machine.
- Sounds like Bach Archived October 13, 2007, at the Wayback Machine.
- Hofstadter, Douglas, To Err is Human; to Study Error-making is Cognitive Science. Together with David Moser. Michigan Quarterly Review, Vol. XXVIII, No. 2, 1989, pp. 185–215.
- Consciousness In The Cosmos: Perspective of Mind: Douglas Hofstadter Archived August 4, 2008, at the Wayback Machine.
- Hofstadter, Douglas R. Le Ton Beau de Marot. New York: Basic Books, 1997, pp. 16–17.
- Hofstadter, Douglas R. Le Ton Beau de Marot. New York: Basic Books, 1997, p. 627
- "People at the CRCC". The Center for Research on Concepts and Cognition. Archived from the original on February 22, 2014. Retrieved February 18, 2014.
- "Me, My Soul, and I". Wired. March 2007. Archived from the original on September 29, 2007. Retrieved December 10, 2007.
- The Mind Reader Archived March 1, 2017, at the Wayback Machine., New York Times Magazine, April 1, 2007
- Mean Chess-Playing Computer Tears at Meaning of Thought Archived March 17, 2015, at Wikiwix by Bruce Weber, February 19, 1996, New York Times
- Hofstadter, Douglas (1985). Metamagical Themas (PDF). p. 9.
- "Will Spiritual Robots Replace Humanity By 2100?", April 1, 2000 Note: as of 2007, videos seem to be missing.
- "Moore's Law, Artificial Evolution, and the Fate of Humanity." In L. Booker, S. Forrest, et al. (eds.), Perspectives on Adaptation in Natural and Artificial Systems. New York: Oxford University Press, 2003.
- The Singularity Summit at Stanford Archived October 18, 2007, at the Wayback Machine. 2006
- Trying to Muse Rationally about the Singularity Scenario Archived March 30, 2008, at the Wayback Machine. 35 minute video, May 13, 2006
- Quotes from his 2006 Singularity Summit presentation Archived December 28, 2007, at the Wayback Machine.
- "Staring EMI Straight in the Eye—and Doing My Best Not to Flinch." In David Cope, Virtual Music: Computer Synthesis of Musical Style, Cambridge, MA: The MIT Press, 2001.
- Victim of the Brain Archived August 17, 2007, at the Wayback Machine. – 1988 docudrama about the ideas of Douglas Hofstadter
- Online implementation of his Reviews of this Book idea Archived January 7, 2009, at the Wayback Machine.
- A Person Paper on Purity in Language Archived May 16, 2015, at the Wayback Machine. by William Satire (alias Douglas R. Hofstadter), 1985 – a satirical piece, on the subject of sexist language
- Metamagical Themas, Douglas R. Hofstadter, Basic Books, New Yoork (1985), see preface, introduction, contents listing.
- French and Italian Archived December 12, 2007, at the Wayback Machine. Spring 1996, Vol. X
- http://www.heraldtimesonline.com/srch.php?terms=hofstadter+baofen&x=0&y=0[dead link]
- Piano Music by Douglas Hofstadter (Audio CD) ISBN 1-57677-143-1, 2000
- Hofstadter, Douglas R. I Am a Strange Loop, p. v. Basic Books, 2007.
- Hofstadter, Douglas R. I Am a Strange Loop, p. xi. Basic Books, 2007. "No one knew what it was, but Molly wasn't able to understand language or to speak (nor is she to this day, and we never did find out why)."
- Gardner, Martin (August 2007). "Do Loops Explain Consciousness? Review of I Am a Strange Loop" (PDF). Notices of the American Mathematical Society. 54 (7): 853. Archived (PDF) from the original on February 16, 2008. Retrieved December 10, 2007.
-  2012
- "Archived copy". Archived from the original on June 20, 2004. Retrieved May 27, 2004.CS1 maint: Archived copy as title (link) CRCC Publications offline
|Wikiquote has quotations related to: Douglas Hofstadter|
|Wikimedia Commons has media related to Douglas Hofstadter.|
- Stanford University Presidential Lecture – site dedicated to Hofstadter and his work
- Douglas Hofstadter at DBLP Bibliography Server
- The Man Who Would Teach Machines to Think by James Somers, The Atlantic, November 2013 Issue
- Profile at Resonance Publications
- NF Reviews – bibliographic page with reviews of several of Hofstadter's books
- "Autoportrait with Constraint" – a short autobiography in the form of a lipogram
- Github repo of sourcecode & literature of Hofstadter's students work