Like great art, great thought experiments have implications unintended by their creators. Take philosopher John Searles Chinese room experiment. Searle concocted it to convince us that computers dont really think as we do; they manipulate symbols mindlessly, without understanding what they are doing.
Searle meant to make a point about the limits of machine cognition. Recently, however, the Chinese room experiment has goaded me into dwelling on the limits of human cognition. We humans can be pretty mindless too, even when engaged in a pursuit as lofty as quantum physics.
Some background. Searle first proposed the Chinese room experiment in 1980. At the time, artificial intelligence researchers, who have always been prone to mood swings, were cocky. Some claimed that machines would soon pass the Turing test, a means of determining whether a machine thinks.
Computer pioneer Alan Turing proposed in 1950 that questions be fed to a machine and a human. If we cannot distinguish the machines answers from the humans, then we must grant that the machine does indeed think. Thinking, after all, is just the manipulation of symbols, such as numbers or words, toward a certain end.
Some AI enthusiasts insisted that thinking, whether carried out by neurons or transistors, entails conscious understanding. Marvin Minsky espoused this strong AI viewpoint when I interviewed him in 1993. After defining consciousness as a record-keeping system, Minsky asserted that LISP software, which tracks its own computations, is extremely conscious, much more so than humans. When I expressed skepticism, Minsky called me racist.
Back to Searle, who found strong AI annoying and wanted to rebut it. He asks us to imagine a man who doesnt understand Chinese sitting in a room. The room contains a manual that tells the man how to respond to a string of Chinese characters with another string of characters. Someone outside the room slips a sheet of paper with Chinese characters on it under the door. The man finds the right response in the manual, copies it onto a sheet of paper and slips it back under the door.
Unknown to the man, he is replying to a question, like What is your favorite color?, with an appropriate answer, like Blue. In this way, he mimics someone who understands Chinese even though he doesnt know a word. Thats what computers do, too, according to Searle. They process symbols in ways that simulate human thinking, but they are actually mindless automatons.
Searles thought experiment has provoked countless objections. Heres mine. The Chinese room experiment is a splendid case of begging the question (not in the sense of raising a question, which is what most people mean by the phrase nowadays, but in the original sense of circular reasoning). The meta-question posed by the Chinese Room Experiment is this: How do we know whether any entity, biological or non-biological, has a subjective, conscious experience?
When you ask this question, you are bumping into what I call the solipsism problem. No conscious being has direct access to the conscious experience of any other conscious being. I cannot be absolutely sure that you or any other person is conscious, let alone that a jellyfish or smartphone is conscious. I can only make inferences based on the behavior of the person, jellyfish or smartphone.
Now, I assume that most humans, including those of you reading these words, are conscious, as I am. I also suspect that Searle is probably right, and that an intelligent program like Siri only mimics understanding of English. It doesnt feel like anything to be Siri, which manipulates bits mindlessly. Thats my guess, but I cant know for sure, because of the solipsism problem.
Nor can I know what its like to be the man in the Chinese room. He may or may not understand Chinese; he may or may not be conscious. There is no way of knowing, again, because of the solipsism problem. Searles argument assumes that we can know whats going on, or not going on, in the mans mind, and hence, by implication, whats going on or not in a machine. His flawed initial assumption leads to his flawed, question-begging conclusion.
That doesnt mean the Chinese room experiment has no value. Far from it. The Stanford Encyclopedia of Philosophy calls it the most widely discussed philosophical argument in cognitive science to appear since the Turing Test. Searles thought experiment continues to pop up in my thoughts. Recently, for example, it nudged me toward a disturbing conclusion about quantum mechanics, which Ive been struggling to learn over the last year or so.
Physicists emphasize that you cannot understand quantum mechanics without understanding its underlying mathematics. You should have, at a minimum, a grounding in logarithms, trigonometry, calculus (differential and integral) and linear algebra. Knowing Fourier transforms wouldnt hurt.
Thats a lot of math, especially for a geezer and former literature major like me. I was thus relieved to discover Q Is for Quantum by physicist Terry Rudolph. He explains superposition, entanglement and other key quantum concepts with a relatively simple mathematical system, which involves arithmetic, a little algebra and lots of diagrams with black and white balls falling into and out of boxes.
Rudolph emphasizes, however, that some math is essential. Trying to grasp quantum mechanics without any math, he says, is like having van Goghs Starry Night described in words to you by someone who has only seen a black and white photograph. One that a dog chewed.
But heres the irony. Mastering the mathematics of quantum mechanics doesnt make it easier to understand and might even make it harder. Rudolph, who teaches quantum mechanics and co-founded a quantum-computer company, says he feels cognitive dissonance when he tries to connect quantum formulas to sensible physical phenomena.
Indeed, some physicists and philosophers worry that physics education focuses too narrowly on formulas and not enough on what they mean. Philosopher Tim Maudlin complains in Philosophy of Physics: Quantum Theory that most physics textbooks and courses do not present quantum mechanics as a theory, that is, a description of the world; instead, they present it as a recipe, or set of mathematical procedures, for accomplishing certain tasks.
Learning the recipe can help you predict the results of experiments and design microchips, Maudlin acknowledges. But if a physics student happens to be unsatisfied with just learning these mathematical techniques for making predictions and asks instead what the theory claims about the physical world, she or he is likely to be met with a canonical response: Shut up and calculate!
In his book, Maudlin presents several attempts to make sense of quantum mechanics, including the pilot-wave and many-worlds models. His goal is to show that we can translate the Schrdinger equation and other formulas into intelligible accounts of whats happening in, say, the double-slit experiment. But to my mind, Maudlins ruthless examination of the quantum models subverts his intention. Each model seems preposterous in its own way.
Pondering the plight of physicists, Im reminded of an argument advanced by philosopher Daniel Dennett in From Bacteria to Bach and Back: The Evolution of Minds. Dennett elaborates on his long-standing claim that consciousness is overrated, at least when it comes to doing what we need to do to get through a typical day. We carry out most tasks with little or no conscious attention.
Dennett calls this competence without comprehension. Adding insult to injury, Dennett suggests that we are virtual zombies. When philosophers refer to zombies, they mean not the clumsy, grunting cannibals of The Walking Dead but creatures that walk and talk like sentient humans but lack inner awareness.
When I reviewed Dennetts book, I slammed him for downplaying consciousness and overstating the significance of unconscious cognition. Competence without comprehension may apply to menial tasks like brushing your teeth or driving a car but certainly not to science and other lofty intellectual pursuits. Maybe Dennett is a zombie, but Im not! That, more or less, was my reaction.
But lately Ive been haunted by the ubiquity of competence without comprehension. Quantum physicists, for example, manipulate differential equations and matrices with impressive competenceenough to build quantum computers!but no real understanding of what the math means. If physicists end up like information-processing automatons, what hope is there for the rest of us? After all, our minds are habituation machines, designed to turn even complex taskslike being a parent, husband or teacherinto routines that we perform by rote, with minimal cognitive effort.
The Chinese room experiment serves as a metaphor not only for physics but also for the human condition. Each of us sits alone within the cell of our subjective awareness. Now and then we receive cryptic messages from the outside world. Only dimly comprehending what we are doing, we compose responses, which we slip under the door. In this way, we manage to survive, even though we never really know what the hell is happening.
Is the Schrdinger Equation True?
Will Artificial Intelligence Ever Live Up to Its Hype?
Can Science Illuminate Our Inner Dark Matter
Read this article:
- Link between quantum mechanics and ballet - Times of Malta - June 6th, 2021
- Weird World of Quantum Black Holes May Be Radically Different from What Einstein Predicted and Lack Event H - The Daily Galaxy --Great Discoveries... - June 6th, 2021
- Spacetime Crystals: New Mathematical Formula May Solve Old Problem in Understanding the Fabric of the Universe - SciTechDaily - June 6th, 2021
- Celebrating the Class of 2021 | UC San Diego News - UC San Diego Health - June 6th, 2021
- Im No Longer a Spectator to the Unfolding of My Life. - ADDitude - June 6th, 2021
- How Quantum Physics Allows Us To See Back Through Space And Time - Forbes - May 14th, 2021
- Is everything predetermined? Why physicists are reviving a taboo idea - New Scientist - May 14th, 2021
- New evidence for electron's dual nature found in a quantum spin liquid . New experiments conducted at - Princeton University - May 14th, 2021
- A wobbling muon could unlock mysteries of the universe - Vox.com - May 14th, 2021
- Quantum science, particle physics and nanoscale motors awarded support from Eric and Wendy Schmidt Transformative Tech Fund - Princeton University - May 14th, 2021
- Quantum Computing In Finance Where We Stand And Where We Could Go - Science 2.0 - May 14th, 2021
- Pathogenic, auto-immune or viral, all diseases are actually epigenetic - The Times of India Blog - May 14th, 2021
- Outlook on the Quantum Technology Global Market to 2026 - - GlobeNewswire - May 14th, 2021
- Researchers confront major hurdle in quantum computing - University of Rochester - May 9th, 2021
- Can a Patent Be Valid and Invalid at the Same Time? - Bloomberg Law - May 9th, 2021
- Breaking the Laws of Physics: Steering Light to Places It Isnt Supposed to Go - SciTechDaily - May 9th, 2021
- Are We on the Brink of a New Age of Scientific Discovery? - SciTechDaily - May 9th, 2021
- Can you really put a price on your college major? - The Boston Globe - May 9th, 2021
- Physicist and jazz pianist combines music and science at Rochester - University of Rochester - May 7th, 2021
- On the marvels of physics | symmetry magazine - Symmetry magazine - May 7th, 2021
- What financial crises and quantum mechanisms have in common - The New Times - May 7th, 2021
- MIT Researcher Says UFO Research Could Lead to New Laws of Physics - Futurism - May 7th, 2021
- Collins Aerospace upgrades US Navy C-130 fleet with long-lasting wheels and carbon brakes - PRNewswire - May 7th, 2021
- Andy Weirs New Space Odyssey - The New York Times - May 3rd, 2021
- The coherence of light is fundamentally tied to the quantum coherence of the emitting particle - Science Advances - May 3rd, 2021
- The battle for free will in the face of determinism - The Guardian - May 3rd, 2021
- Tulane part of Navy/Army-funded research on improving communication - News from Tulane - May 3rd, 2021
- A clocks accuracy may be tied to the entropy it creates - Science News Magazine - May 3rd, 2021
- Wellness Wednesday advice: If going to be sad? Don't! - Campus Times - May 3rd, 2021
- Beyond Books: Creative ways to combat the summer slide - Chillicothe Gazette - May 3rd, 2021
- #PulpNonFiction: Advertisers, be clear about what you want to say and why! - Bizcommunity.com - May 3rd, 2021
- Q&A: Are We on the Brink of a New Age of Scientific Discovery? - University of Virginia - May 3rd, 2021
- In Quantum Physics, Reality Really Is What We Choose To Observe - Walter Bradley Center for Natural and Artificial Intelligence - April 21st, 2021
- Multiple Realities | Physics - Denison University - April 21st, 2021
- IISER physicist Prof Arvind is Punjabi University VC - The Tribune - April 21st, 2021
- Theoretical Physicist Prof Arvind appointed Punjabi Varsity Vice Chancellor - The Tribune - April 21st, 2021
- A cosmologist throws light on a universe of bias - Salon - April 21st, 2021
- Recent Reports Of Overturned Scientific Theory Are Premature - Forbes - April 21st, 2021
- Helgoland by Carlo Rovelli - read an exclusive extract - RTE.ie - April 17th, 2021
- Researchers Visualize the Motion of Vortices in Quantum Superfluid Turbulence - SciTechDaily - April 17th, 2021
- Will we ever know exactly how the universe ballooned into existence? - Livescience.com - April 17th, 2021
- 'The Disordered Cosmos', A Contemplation of the Exclusionary Culture of Physics - The Wire Science - April 17th, 2021
- Albert Einstein Death Anniversary: How did the greatest physicists of all time die? - Free Press Journal - April 17th, 2021
- Half Life traces family complexities for a Milwaukee physics teacher - The Globe and Mail - April 17th, 2021
- Scott Aaronson Winner of 2020 ACM Prize In Computing - iProgrammer - April 17th, 2021
- Book Review: A Cosmologist Throws Light on a Universe of Bias - Undark Magazine - April 17th, 2021
- Realization of an ideal Weyl semimetal band in a quantum gas with 3D spin-orbit coupling - Science Magazine - April 17th, 2021
- Quantum computers are revealing an unexpected new theory of reality - New Scientist - April 15th, 2021
- Student's physics homework picked up by Amazon quantum researchers - News - The University of Sydney - April 15th, 2021
- The Big Theoretical Physics Problem At The Center Of The 'Muon g-2' Puzzle - Forbes - April 15th, 2021
- 615 Million Euros Awarded to Quantum Delta NL for Quantum Research in the Netherlands - HPCwire - April 15th, 2021
- The God Equation Review: One String Theory to Rule Them All - The Wall Street Journal - April 15th, 2021
- The Disordered Cosmos review: An insider take on physics and injustice - New Scientist News - April 15th, 2021
- Course explores 'Magic, Witchcraft and Healing' > News > USC Dornsife - USC Dornsife College of Letters, Arts and Sciences - April 15th, 2021
- How matters hidden complexity unleashed the power of nuclear physics - Science News Magazine - April 15th, 2021
- Scientists Perform First-ever Ultracold Atom Interferometry in Space, Leading to Possible Physics Breakthroughs - Science Times - April 15th, 2021
- The windswept German island that inspired quantum physics - Spectator.co.uk - April 6th, 2021
- Junior wins Goldwater scholarship | The Source | Washington University in St. Louis - Washington University Record - April 6th, 2021
- Raytheon Technologies Announces $500 Million Social Impact Initiative - PRNewswire - April 6th, 2021
- Raytheon Technologies to release first quarter results on April 27, 2021 - CapeNews.net - April 6th, 2021
- An Interstellar Trip with Einstein, Newton, and Tesla - EE Times India - April 6th, 2021
- Searching for New Physics in the Subatomic World - SciTechDaily - April 6th, 2021
- QCI Expands Sales and Marketing Team to Accelerate Growth and Advance Enterprise Adoption of Quantum Computing - GlobeNewswire - April 6th, 2021
- Quantum Physics to Disrupt Geospatial Industry over the Coming Decade - GIM International - April 4th, 2021
- Imaginarity: New Paper Says The Imaginary Part Of Quantum Mechanics Can Be Observed - Science 2.0 - April 4th, 2021
- The mystery of the muon's magnetism | symmetry magazine - Symmetry magazine - April 4th, 2021
- Your Guide to Products and Technologies That Are Pseudoscience - Interesting Engineering - April 4th, 2021
- 6 Quantum Computing Stocks to Invest in This Decade - Investment U - April 4th, 2021
- What if youre living in a simulation, but theres no computer? - The Next Web - April 4th, 2021
- Quantum physics: what to expect - Study International News - March 31st, 2021
- Helgoland by Carlo Rovelli review a meditation on quantum theory - The Guardian - March 31st, 2021
- 'Spacekime theory' could speed up research and heal the rift in physics - Big Think - March 31st, 2021
- Some Black Holes Are Impossible In Our Universe - Forbes - March 31st, 2021
- Scientists Have Simulated The Primordial Quantum Structure of Our Universe - ScienceAlert - March 31st, 2021
- Post-Doctoral Research Associate Experimental Condensed Matter Physics job with ROYAL HOLLOWAY, UNIVERSITY OF LONDON | 250229 - Times Higher Education... - March 31st, 2021
- No free will, no ideas: Physicist Brian Greene reduces everything to 'particles and fields' - National Catholic Reporter - March 31st, 2021
- Carlo Rovelli on his search for the theory of everything - Prospect - March 31st, 2021
- Do Alternate Realities Exist? This Artist's Machines Are Ready to Find Out - PCMag - March 31st, 2021
- After 50 Years, Physicists Confirm The Existence of an Elusive Quasiparticle - ScienceAlert - March 25th, 2021
- Helgoland by Carlo Rovelli review the mysteries of quantum mechanics - The Guardian - March 25th, 2021