Serendipity is the effect by which one accidentally discovers something fortunate, especially while looking for something else entirely. The word has been voted as one of the ten English words that were hardest to translate in June 2004 by a British translation company.Fact|date=May 2008 However, due to its sociological use, the word has been imported into many other languages (Portuguese "serendipicidade" or "serendipidade"; French "sérendipicité" or "sérendipité" but also "heureux hasard", "fortunate chance"; Italian "serendipità"; Dutch "serendipiteit"; German "Serendipität"; Swedish, Danish and Norwegian "serendipitet"; Romanian "serendipitate"; Spanish "serendipia" ).
The word derives from "Serendip", the old Persian name for
Sri Lanka, [" OED", "serendipity".] and was coined by Horace Walpoleon 28 January 1754in a letter he wrote to his friend Horace Mann (not the same man as the famed American educator), an Englishman then living in Florence. The letter read,
:"It was once when I read a silly fairy tale, called "
The Three Princes of Serendip": as their highnesses travelled, they were always making discoveries, by accidents and sagacity, of things which they were not in quest of: for instance, one of them discovered that a camel blind of the right eye had travelled the same road lately, because the grass was eaten only on the left side, where it was worse than on the right—now do you understand "serendipity"? One of the most remarkable instances of this "accidental sagacity" (for you must observe that "no" discovery of a thing you "are" looking for, comes under this description) was of my Lord Shaftsbury, who happening to dine at Lord Chancellor Clarendon's, found out the marriage of the Duke of York and Mrs. Hyde, by the respect with which her mother treated her at table." [As given by W. S. Lewis, ed., "Horace Walpole's Correspondence", Yale edition, in the book by Theodore G. Remer, ed.: "Serendipity and the Three Princes, from the Peregrinaggio of 1557, Edited, with an Introduction and Notes, by Theodore G. Remer, Preface by W.S. Lewis". University of Oklahoma Press, 1965. LCC 65-10112]
The role of serendipity in science and technology
One aspect of Walpole's original definition of serendipity that is often missed in modern discussions of the word is the "sagacity" of being able to link together apparently innocuous facts to come to a valuable conclusion. Thus, while some scientists and inventors are reluctant about reporting accidental discoveries, others openly admit its role; in fact serendipity is a major component of scientific discoveries and inventions. According to M.K. Stoskopf [ [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=AbstractPlus&list_uids=16179740&query_hl=2&itool=pubmed_DocSum Observation and cogitation: how serendipity provid... [ILAR J. 2005 - PubMed Result ] ] "it should be recognized that serendipitous discoveries are of significant value in the advancement of science and often present the foundation for important intellectual leaps of understanding".
The amount of contribution of serendipitous discoveries varies extensively among the several scientific disciplines.
Pharmacologyand chemistryare probably the fields where serendipity is more common.
Most authors who have studied scientific serendipity both in a historical, as well as in an
epistemologicalpoint of view, agree that a prepared and open mind is required on the part of the scientist or inventor to detect the importance of information revealed accidentally. This is the reason why most of the related accidental discoveries occur in the field of specialization of the scientist. About this, Albert Hofmann, the Swiss chemist who discovered LSDproperties by unintentionally ingesting it at his lab, wrote:
"It is true that my discovery of LSD was a chance discovery, but it was the outcome of planned experiments and these experiments took place in the framework of systematic pharmaceutical, chemical research. It could better be described as serendipity."
The French scientist
Louis Pasteuralso famously said: "In the fields of observation chance favors only the prepared mind." [Original French, as at : "Dans les champs de l'observation le hasard ne favorise que les esprits préparés."] This is often rendered as "Chance favors the prepared mind."
History, of course, does not record accidental exposures of information which could have resulted in a new discovery, and we are justified in suspecting that they are many. There are several examples of this, however, and prejudice of preformed concepts are probably the largest obstacle. See for example [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=AbstractPlus&list_uids=16608738&query_hl=4&itool=pubmed_docsum] for a case where this happened (the rejection of an accidental discovery in the field of self-stimulation of the brain in humans).
Examples of serendipity in science and technology
Geligniteby Alfred Nobel, when he accidentally mixed collodium ( gun cotton) with nitroglycerin
Polymethyleneby Hans von Pechmann, who prepared it by accident in 1898 while heating diazomethane
Low density polyethyleneby Eric Fawcett and Reginald Gibson at the ICI works in Northwich, England. It was the first industrially practical polyethylene synthesis and was discovered (again by accident) in 1933
Silly Puttyby James Wright, on the way to solving another problem: finding a rubbersubstitute for the United Statesduring World War II.
Chemical synthesisof urea, by Friedrich Woehler. He was attempting to produce ammonium cyanateby mixing potassium cyanateand ammonium chlorideand got urea, the first organic chemicalto be synthesised, often called the 'Last Nail' of the coffin of the Élan vitalTheory
Pittacal, the first synthetic dyestuff, by Carl Ludwig Reichenbach. The dark blue dye appeared on wooden posts painted with creosoteto drive away dogs who urinated on them.
Mauve, the first aniline dye, by William Henry Perkin. At the age of 18, he was attempting to create artificial quinine. An unexpected residue caught his eye, which turned out to be the first aniline dye—specifically, mauveine, sometimes called aniline purple.
Racemization, by Louis Pasteur. While investigating the properties of sodium ammonium tartrate he was able to separate for the first time the two optical isomers of the salt. His luck was twofold: it is the only racemate salt to have this property, and the room temperature that day was slightly below the point of separation.
* Teflon, by
Roy J. Plunkett, who was trying to develop a new gas for refrigerationand got a slick substance instead, which was used first for lubrication of machine parts
Superglue(a.k.a. "Krazy Glue") was accidentally twice discovered by Dr. Harry Coover, first when he was developing a clear plasticfor gunsights and later, when he was trying to develop a heat-resistant polymerfor jet canopies.
Scotchgard moisture repellantused to protect fabricsand leather, was discovered accidentally in 1953 by Patsy Sherman. One of the compounds she was investigating as a rubbermaterial that wouldn't deteriorate when in contact with aircraft fuelspilled onto a tennis shoeand would not wash out; she then considered the spill as a protectant against spills.
Cellophane, a thin, transparent sheet made of regenerated cellulose, was developed in 1908 by Swiss chemist Jacques Brandenberger, as a material for covering stain-proof tablecloth.
* The chemical element
helium. British chemist William Ramsayisolated helium while looking for argonbut, after separating nitrogenand oxygenfrom the gas liberated by sulfuric acid, noticed a bright-yellow spectral linethat matched the D3 lineobserved in the spectrumof the Sun.
* The chemical element
Iodinewas discovered by Bernard Courtoisin 1811, when he was trying to remove residues with strong acidfrom the bottom of his saltpeter production plant which used seaweedashes as a prime material.
Polycarbonates, a kind of clear hard plastic
* The synthetic
polymer celluloidwas discovered by British chemist and metallurgist Alexander Parkesin 1856, after observing that a solid residue remained after evaporation of the solventfrom photographic collodion. Celluloid can be described as the first plastic used for making solid objects (the first ones being billiardballs, substituting for expensive ivory).
Rayon, the first synthetic silk, was discovered by French chemist Hilaire de Chardonnet, an assistant to Louis Pasteur. He spilled a bottle of collodionand found later that he could draw thin strands from the evaporated viscous liquid.
* The possibility of synthesizing
indigo, a natural dyeextracted from a plant with the same name was discovered by a chemist named Sapper who was heating coal tarwhen he accidentally broke a thermometerwhose mercury content acted as a catalystto produce phthalic anhydride, which could readily be converted into indigo.
* The dye
monastral bluewas discovered in 1928 in Scotland, when chemist A.G. Dandridgeheated a mixture of chemicals at high temperature in a sealed ironcontainer. The iron of the container reacted with the mixture, producing some pigments called phthalocyanines. By substituting copperfor iron he produced an even better pigment called 'monastral blue', which became the basis for many new coloring materials for paints, lacquers and printing inks.
Acesulfame, an artificial sweetener, was discovered accidentally in 1967 by Karl Claus at Hoechst AG.
* Another sweetener,
cyclamate, was discovered by US chemist Michael Sveda, when he smoked a cigarette accidentally contaminated with a compound he had recently synthesized.
Aspartame(NutraSweet) was accidentally ingested by G.D. Searlechemist James Schlatter, who was trying to develop a test for an anti- ulcerdrug.
Penicillinby Alexander Fleming. He failed to disinfect cultures of bacteriawhen leaving for his vacations, only to find them contaminated with " Penicillium" molds, which killed the bacteria. However, he had previously done extensive research into antibacterial substances.
psychedeliceffects of LSDby Albert Hofmann. A chemist, he intentionally ingested a small amount of it upon investigating its properties, and had the first " acid trip" in history, while cycling to his home in Switzerland; this is commemorated among LSD users annually as Bicycle Day.
5-fluorouracil's therapeutic action on actinic keratosis, was initially investigated for its anti- canceractions
Minoxidil's action on baldness, originally it was an oral agent for treating hypertension. It was observed that bald patients treated with it grew hairtoo.
Viagra(sildenafil citrate), an anti- impotencedrug. It was initially studied for use in hypertensionand angina pectoris. Phase I clinical trials under the direction of Ian Osterlohsuggested that the drug had little effect on angina, but that it could induce marked penile erections.
Retin-Aanti- wrinkleaction. It was a vitamin Aderivative first used for treating acne. The accidental result in some older people was a reduction of wrinkles on the face
libido-enhancing effect of l-dopa, a drug used for treating Parkinson's disease. Older patients in a sanatorium had their long-lost interest in sex suddenly revived.
* The first
benzodiazepine, chlordiazepoxide(Librium) was discovered accidentally in 1954 by the Austrian scientist Dr Leo Sternbach(1908–2005), who found the substance while cleaning up his lab
* The first
anti-psychoticdrug, chlorpromazine, was discovered by French pharmacologist Henri Laborit. He wanted to add an anti-histaminic to a pharmacological combination to prevent surgical shock and noticed that patients treated with it were unusually calm before the operation.
* the anti-
cancerdrug cisplatinwas discovered by Barnett Rosenberg. He wanted to explore the inhibiting effects of an electric fieldon the growth of bacteria: it was rather due to an electrolysisproduct of the platinum electrodehe was using.
* The anesthetic
nitrous oxide(laughing gas). Initially well known for inducing altered behavior ( hilarity), its properties were discovered when British chemist Humphry Davytested the gas on himself and some of his friends, and soon realised that nitrous oxide considerably dulled the sensation of pain, even if the inhaler were still semi-conscious.
* The anesthetic ether
Mustine, a derivative of mustard gas(a chemical weapon), used for the treatment of some forms of cancer. In 1943, physicians noted that the white cell counts of US soldiers accidentally exposed when a cache of mustard gas shells were bombed in Bari, Italy, were decreased, and mustard gas was investigated as a therapy for Hodgkin's lymphoma.
* The first oral contraceptive (a.k.a. "The Pill") was discovered by Dr.
Carl Djerassiaccidental production of synthetic progesteroneand its intentional modification to allow for oral intake
Prontosil, an antibioticof the sulfagroup was an azo dye. German chemists at Bayerhad the wrong idea that selective chemical stains of bacteria would show specific antibacterial activity. Prontosil had it, but in fact it was due to another substance metabolised from it in the body, sulfanilimide.
Medicine and Biology
Bioelectricity, by Luigi Galvani. He was dissecting a frogat a table where he had been conducting experiments with static electricity, Galvani's assistant touched an exposed sciatic nerveof the frog with a metal scalpel, which had picked up a charge, provoking a musclecontraction.
* Neural control of
blood vessels, by Claude Bernard
Anaphylaxis, by Charles Robert Richet, when he tried to reuse dogs that hadn't previously shown allergic reactions to sea anemone toxin, developed them much faster and more intensely the second time
* The role of the
pancreasin glucose metabolism, by Oskar Minkowski. Dogs that had their pancreasremoved for an unrelated physiological investigation, urinated profusely and the urine attracted flies, indicating its high glucose content
Coronary catheterizationwas discovered as a method when a cardiologistat the Cleveland Clinicaccidentally injected radiocontrastinto the coronary arteryinstead of the left ventricle.
mydriaticeffects of belladonnaextracts, by Friedrich Ferdinand Runge
Vaccination, discovered by English physician Edward Jenner, after he observed that milkmaids did not catch smallpoxafter exposure to benign cowpox.
Interferon, an antiviral factor, was discovered accidentally by two Japanese virologists, Yasu-ichi Naganoand Yasuhiko Kojimawhile trying to develop an improved vaccinefor smallpox.
Physics and Astronomy
* Discovery of the
planet Uranusby William Herschel. Herschel was looking for comets, and initially identified Uranusas a comet until he noticed the circularity of its orbitand its distance and suggested that it was a planet, the first one discovered since antiquity.
Infrared radiation, again by William Herschel, while investigating the temperaturedifferences between different colors of visible lightby dispersing sunlightinto a spectrumusing a glass prism. He put thermometers into the different visible colors where he expected a temperature increase, and one as a control to measure the ambient temperature in the dark region beyond the red end of the spectrum. The thermometer beyond the red unexpectedly showed a higher temperature than the others, showing that there was non-visible radiationbeyond the red end of the visible spectrum.
* S. N. Bose discovered
Bose-Einstein statisticswhen a mathematical error surprisingly explained anomalous data.
High-temperature superconductivitywas discovered serendipitously by physicists Johannes Georg Bednorzand Karl Alexander Müller, ironically when they were searching for a material that would be a perfect electrical insulator(nonconducting). They won the 1987 Nobel Prize in Physicsfor the discovery.
* Cosmic Microwave Background Radiation, by
Arno A. Penziasand Robert Woodrow Wilson. What they thought was excess thermal noisein their antenna at Bell Labswas due to the CMBR.
Radioactivity, by Henri Becquerel. While trying to investigate phosphorescent materials using photographic plates, he stumbled upon uranium.
X rays, by Wilhelm Roentgen. Interested in investigating cathodic ray tubes, he noted that some fluorescentpapers in his lab were illuminated at a distance although his apparatus had an opaque cover
Electromagnetism, by Hans Christian Oersted. While he was setting up his materials for a lecture, he noticed a compassneedle deflecting from magnetic northwhen the electric currentfrom the battery he was using was switched on and off.
gamma-ray bursts were discovered in the late 1960s by the US Vela satellites, which were built to detect nuclear tests in the Soviet Union
Metallic hydrogenwas found accidentally in March 1996 by a group of scientists at Lawrence Livermore National Laboratory, after a 60-year search.
thermoelectric effectwas discovered accidentally by Estonian physicist Thomas Seebeck, in 1821, who found that a voltagedeveloped between the two ends of a metalbar when it was submitted to a difference of temperature.
Pluto's moon Charon was discovered by US astronomer James Christyin 1978. He was going to discard what he thought was a defective photographic plate of Pluto, when his Star Scanmachine broke down. While it was being repaired he had time to study the plate again and discovered others in the archives with the same "defect" (a bulge in the planet's image which was actually a large moon).
* Discovery of the principle behind
inkjet printers by a Canon engineer. After putting his hot soldering ironby accident on his pen, ink was ejected from the pen's point a few moments later.
Vulcanizationof rubber, by Charles Goodyear. He accidentally left a piece of rubber mixture with sulfuron a hot plate, and produced vulcanized rubber
Safety glass, by French scientist Edouard Benedictus. In 1903 he accidentally knocked a glass flask to the floor and observed that the broken pieces were held together by a liquid plasticthat had evaporated and formed a thin filminside the flask.
Corn flakesand wheat flakes( Wheaties) were accidentally discovered by the Kelloggsbrothers in 1898, when they left cooked wheatuntended for a day and tried to roll the mass, obtaining a flaky material instead of a sheet.
microwave ovenwas invented by Percy Spencerwhile testing a magnetronfor radarsets at Raytheon, he noticed that a peanutcandy bar in his pocket had melted when exposed to radar waves.
Pyroceramic(used to make Corningware, among other things) was invented by S. Donald Stookey, a chemist working for the Corning company, who noticed crystallizationin an improperly cooled batch of tinted glass.
Slinkywas invented by US Navy engineer Richard Jamesafter he accidentally knocked a torsion spring off his work table and observed its unique motion.
Art Fryhappened to attend a 3Mcollege's seminar on a new "low-tack" adhesive and, wanting to anchor his bookmarks in his hymnalat church, went on to invent Post-It Notes.
Chocolate chip cookieswere invented by Ruth Wakefieldwhen she attempted to make chocolate drop cookies. She did not have the required chocolate so she broke up a candy barand placed the chunks into the cookie mix. These chunks later morphed into what is now known as chocolate chips.
Some ideas and concepts that came to scientists through accidents or even dreams are also considered a kind of serendipity. Some examples (coincidentally all are regarded with suspicion by science historians):
Isaac Newton's famed applefalling from a tree, led to his musings about the nature of gravitation.
* The German chemist
Friedrich August Kekulé von Stradonitz dreamed about Ourobouros, a snakerunning around and forming a circle, leading to his solution of the closed chemical structure of cyclic compounds, such as benzene.
Archimedes' prototypical cry of Eureka when he realised that his body displacing water in the bathtub allowed him to measure the volume of any irregular body, such as a goldcrown.
Other examples of serendipity
Stories of accidental discovery in
explorationabound, of course, because the aim of exploration is to find new things and places. The principle of serendipity applies here, however, when the explorer had an aim in mind and found another unexpectedly. Some classical cases were discoveries of the Americas by explorers with other aims.The first European to set foot on North Americawas Leif Ericsson, who was trying to escape from a storm. The Americas were also accidentally re-discovered (see Leif Ericsson) by Christopher Columbus, who was actually looking for a new way to India. South-Americawas also discovered by accident, first by Spaniard Vicente Pinzon, who was only exploring the West Indiespreviously discovered by him and Columbus, and stumbled upon the Northeast of Brazil, in the region now known as Cabo de Santo Agostinho, in the state of Pernambuco. He also discovered the Amazon and Oiapoquerivers; and Pedro Álvares Cabral, a Portuguese admiral, who was sailing with his fleet to Indiavia the South African route discovered by Vasco da Gamaand was deviated to the coast of Brazil.
Uses of serendipity
Serendipity is used as a sociological method in
Anselm L. Strauss' and Barney G. Glaser's Grounded Theory, building on ideas by sociologist Robert K. Merton, who in "Social Theory and Social Structure" (1949) referred to the "serendipity pattern" as the fairly common experience of observing an unanticipated, anomalous and strategic datum which becomes the occasion for developing a new theory or for extending an existing theory. Robert K. Mertonalso coauthored (with Elinor Barber) " The Travels and Adventures of Serendipity" (Princeton: Princeton University Press, 2003), which traces the origins and uses of the word "serendipity" since it was coined. The book is "a study in sociological semantics and the sociology of science", as the subtitle of the book declares. It further develops the idea of serendipity as scientific "method" (as juxtaposed with purposeful discovery by experiment or retrospective prophecy).There is are "Serendipity books" which tell fairy tales that teach children valuable life lessons through the characters mishaps. They are written by Stephen Cosgrove and illustrated by Robin James.
The exact meaning of serendipity
There are three interrelated debates regarding the meaning of the word "serendipity":Fact|date=February 2007
* The first debate: are the events referred to by Walpole in his letter to Mann, good examples of "serendipity", as defined by Walpole? Expanding on this debate, are any of the adventures of the Three Princes, good examples of Walpole's definition of serendipity?
* The second debate: if the examples of serendipity cited by Walpole are not good examples of serendipity, what should determine the meaning of the word "serendipity", Walpole's precise definition, or a definition derived from the adventures of the Three Princes?
* The third debate: given the range of current definitions for the word "serendipity", from Walpole's precise or strict definition to extremely loose definitions, what events should be cited as actual occurrences of serendipity?
Quotations on serendipity
* "In the field of observation, chance favours only the prepared mind."
* "I find that a great part of the information I have was acquired by looking up something and finding something else on the way." (Franklin P. Adams, 1881-1960)
* "Serendipity. Look for something, find something else, and realize that what you've found is more suited to your needs than what you thought you were looking for."
* "The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!', but 'That's funny…'"
* "In reality, serendipity accounts for one percent of the blessings we receive in life, work and love. The other 99 percent is due to our efforts."
* "Serendipity is looking in a haystack for a needle and discovering a farmer's daughter."
Pek van Andel
* "Serendipity is putting a quarter in the gumball machine and having three pieces come rattling out instead of one—all red."
Peter H. Reynolds
* "--- you don't reach Serendib by plotting a course for it. You have to set out in good faith for elsewhere and lose your bearings… serendipitously."
John Barth, "The Last Voyage of Somebody the Sailor"
* "Serendipity is the art of making an unsought finding."
Pek van Andel(1994)
* "Serendipity is the faculty of finding things we did not know we were looking for."
* "Serendipity is when you find things you weren't looking for because finding what you are looking for is so damned difficult."
William Boyd coined the term zemblanity to mean somewhat the opposite of serendipity: "making unhappy, unlucky and expected discoveries occurring by design". [Boyd, William. "Armadillo", Chapter 12, Knopf, New York, 1998. ISBN 0-375-40223-3] It derives from
Novaya Zemlya(or Nova Zembla), a cold, barren land with many features opposite to the lush Sri Lanka (Serendip). On this island Willem Barentsand his crew were stranded while searching for a new route to the east.
Bahramdipity is derived directly from Bahram Gur as characterized in the "Three Princes of Serendip". It describes the "suppression" of serendipitous discoveries or research results by powerful individuals. [(a) [http://www.the-scientist.com/yr1999/feb/opin_990201.html Sommer, Toby J. "'Bahramdipity' and Scientific Research", "The Scientist", 1999, "13"(3), 13.] (b) [http://www.uow.edu.au/arts/sts/bmartin/dissent/documents/Sommer.pdf Sommer, Toby J. "Bahramdipity and Nulltiple Scientific Discoveries," "Science and Engineering Ethicss", 2001, "7"(1), 77-104.] ]
* Theodore G. Remer, Ed.: "Serendipity and the Three Princes, from the Peregrinaggio of 1557, Edited, with an Introduction and Notes, by Theodore G. Remer, Preface by W.S. Lewis". University of Oklahoma Press, 1965. LCC 65-10112
* Robert K. Merton, Elinor Barber: "The Travels and Adventures of Serendipity: A Study in Sociological Semantics and the Sociology of Science". Princeton University Press, 2004. ISBN 0-691-11754-3. (Manuscript written 1958).
* Patrick J. Hannan: "Serendipity, Luck and Wisdom in Research". iUniverse, 2006. ISBN 0-595-36551-5
* Royston M. Roberts: "Serendipity: Accidental Discoveries in Science". Wiley, 1989. ISBN 0-471-60203-5
* Pek Van Andel: "Anatomy of the unsought finding : serendipity: origin, history, domains, traditions, appearances, patterns and programmability." "British Journal for the Philosophy of Science", 1994, 45(2), 631-648.
* "The view from Serendip", by Arthur C. Clarke, Random House, 1977.
Serendipity is the name of the character "The Muse" in Kevin Smith's film Dogma.
* [http://www.thebakken.org/education/SciMathMN/polymers-serendipity/polymer1.htm Polymers & Serendipity: Case Studies] --
rayon, nylon, and more examples in chemistry
* [http://max.ipv.pt Max] - A software agent built to induce serendipity.
* [http://reality.media.mit.edu/serendipity.php Social Serendipity] -
MIT Media Labproject using mobile phones for social matchmaking
* [http://livingheritage.org/three_princes.htm The Three Princes of Serendip] – one version of the story.
* [http://serendip.brynmawr.edu Serendip] - a website continually evolving using the principles of serendipity
* [http://www.serendip.nu Serendip] a Dutch/Belgium internet search competition.
* [http://www.s9y.org Serendipity Blog] - an open source blogging script
* [http://news.bbc.co.uk/1/hi/technology/5018998.stm Serendipity and the Internet] from Bill Thompson at the
* [http://www.pbs.org/wgbh/nova/cancer/discoveries.html Accidental discoveries] . PBS
* [http://www.simonsingh.net/Serendipity.html Serendipity of Science] - a BBC 4 Radio series by Simon Singh
* [http://www.exn.ca/stories/2004/04/19/51.asp Top Ten: Accidental discoveries] . Discovery Channel Explore your World.
* [http://portal.acm.org/citation.cfm?id=1178745.1178756 ACM Paper on Creating serendipitous encounters in a geographically distributed community] .
* [http://www.ercim.org/publication/ws-proceedings/DelNoe01/3_Toms.pdf Serendipitous Information Retrieval : An Academic Research Publication by Elaine G. Toms]
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