Quotes about uncertainty
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Jim Baggott photo

“The actual effect of Rawls’s theory is to undercut theoretically any straightforward appeal to egalitarianism. Egalitarianism has the advantage that gross failure to comply with its basic principles is not difficult to monitor, There are, to be sure, well-known and unsettled issues about comparability of resources and about whether resources are really the proper objects for egalitarians to be concerned with, but there can be little doubt that if person A in a fully monetarized society has ten thousand times the monetary resources of person B, then under normal circumstances the two are not for most politically relevant purposes “equal.” Rawls’s theory effectively shifts discussion away from the utilitarian discussion of the consequences of a certain distribution of resources, and also away from an evaluation of distributions from the point of view of strict equality; instead, he focuses attention on a complex counterfactual judgment. The question is not “Does A have grossly more than B?”—a judgment to which within limits it might not be impossible to get a straightforward answer—but rather the virtually unanswerable “Would B have even less if A had less?” One cannot even begin to think about assessing any such claim without making an enormous number of assumptions about scarcity of various resources, the form the particular economy in question had, the preferences, and in particular the incentive structure, of the people who lived in it and unless one had a rather robust and detailed economic theory of a kind that few people will believe any economist today has. In a situation of uncertainty like this, the actual political onus probandi in fact tacitly shifts to the have-nots; the “haves” lack an obvious systematic motivation to argue for redistribution of the excess wealth they own, or indeed to find arguments to that conclusion plausible. They don't in the same way need to prove anything; they, ex hypothesi, “have” the resources in question: “Beati possidentes.””

Raymond Geuss (1946) British philosopher

“Liberalism and its Discontents,” pp. 22-23.
Outside Ethics (2005)

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Thomas Young (scientist) photo

“This statement appears to us to be conclusive with respect to the insufficiency of the undulatory theory, in its present state, for explaining all the phenomena of light. But we are not therefore by any means persuaded of the perfect sufficiency of the projectile system: and all the satisfaction that we have derived from an attentive consideration of the accumulated evidence, which has been brought forward, within the last ten years, on both sides of the question, is that of being convinced that much more evidence is still wanting before it can be positively decided. In the progress of scientific investigation, we must frequently travel by rugged paths, and through valleys as well as over mountains. Doubt must necessarily succeed often to apparent certainty, and must again give place to a certainty of a higher order; such is the imperfection of our faculties, that the descent from conviction to hesitation is not uncommonly as salutary, as the more agreeable elevation from uncertainty to demonstration. An example of such alternations may easily be adduced from the history of chemistry. How universally had phlogiston once expelled the aërial acid of Hooke and Mayow. How much more completely had phlogiston given way to oxygen! And how much have some of our best chemists been lately inclined to restore the same phlogiston to its lost honours! although now again they are beginning to apprehend that they have already done too much in its favour. In the mean time, the true science of chemistry, as the most positive dogmatist will not hesitate to allow, has been very rapidly advancing towards ultimate perfection.”

Thomas Young (scientist) (1773–1829) English polymath

Miscellaneous Works: Scientific Memoirs (1855) Vol. 1 https://books.google.com/books?id=-XAXAQAAMAAJ, ed. George Peacock & John Leitch, p. 249

“Uncertainty is a personal matter; it is not the uncertainty but your uncertainty.”

Dennis Lindley (1923–2013) British statistician

1. Introduction. p. 1.
Understanding Uncertainty (2006)

“Control pitchers hit corners with an uncertainty of of about 3". One must be a fairly good shot to shoot a pistol with that accuracy.”

Robert Adair (physicist) (1924) Physicist and author

Source: The Physics Of Baseball (Second Edition - Revised), Chapter 3, Pitching, p. 27

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Gordon B. Hinckley photo
Jerry Coyne photo
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Preston Manning photo
William Osler photo

“Medicine is a science of uncertainty and an art of probability.”

William Osler (1849–1919) Canadian pathologist, physician, educator, bibliophile, historian, author, cofounder of Johns Hopkins Hospi…

As quoted in Computers in biomedical research (1965) by Ralph W. Stacy, p. 320.

Leonard Mlodinow photo

“[Task uncertainty is] the difference between the amount of information required to perform the task and the amount of information already possessed by the organisation.”

Jay R. Galbraith (1939–2014) American business theorist

Source: Designing complex organizations, 1973, p. 5

Nicholas Barr photo

“Thus social insurance, in sharp contrast with actuarial insurance, can cover not only risk but also uncertainty.”

Nicholas Barr (1943) British economist

Source: Economics Of The Welfare State (Fourth Edition), Chapter 5, Insurance, p. 117

Didier Sornette photo

“One trader's move in the market can be interpreted by another trader as relevant additional information due to the uncertainty he faces.”

Didier Sornette (1957) French scientist

Source: Why Stock Markets Crash - Critical Events in Complex Systems (2003), Chapter 6, Hierarchies, Complex Fractal Dimensions, And Log Periodicity, p. 182.

Joseph H. Hertz photo

“There are no conventional games involving conditions of uncertainty without risk.”

Richard Arnold Epstein (1927) American physicist

Source: The Theory of Gambling and Statistical Logic (Revised Edition) 1977, Chapter Three, Fundamental Principles Of A Theory Of Gambling, p. 44

Oswald Chambers photo

“I think a highly rational person would have high moral uncertainty at this point and not necessarily be described as "altruistic."”

Wei Dai Cryptocurrency pioneer and computer scientist

In a discussion thread https://www.lesswrong.com/posts/p4Gd8pRcbnKo46hus/building-toward-a-friendly-ai-team#s5uoQrSoFeKke29dm on LessWrong, June 2012

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George Soros photo

“Markets are constantly in a state of uncertainty and flux and money is made by discounting the obvious and betting on the unexpected.”

George Soros (1930) Hungarian-American business magnate, investor, and philanthropist

As quoted in "Great Money Minds" by Chris Stallman at TeenAnalyst.com (5 May 2005) http://www.teenanalyst.com/general/topmoneyminds.html

“Prokofiev’s music is usually based on a firm sense of tonality. Whatever tonal uncertainty and ambiguity one experiences, mainly in developmental passages, they are mostly short-lived.”

Boris Berman (1948) Russian/American musician

Prokofiev’s piano sonatas : a guide for the listener and the performer (2008), Prokofiev: His Life and the Evolution of His Musical Language

Neil Armstrong photo

“There was great uncertainty about how well we would be able to walk in our cumbersome pressurized suit.”

Neil Armstrong (1930–2012) American astronaut; first person to walk on the moon

Letter to Robert Krulwich (2010)

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Henri Fayol photo
Miguel de Unamuno photo

“Uncertainty, doubt, perpetual wrestling with the mystery of our final destiny, mental despair, and the lack of any solid and stable foundation, may be the basis of an ethic.”

Miguel de Unamuno (1864–1936) 19th-20th century Spanish writer and philosopher

The Tragic Sense of Life (1913), XI : The Practical Problem

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Bernard Montgomery, 1st Viscount Montgomery of Alamein photo

“There were many reasons why we did not gain complete success at Arnhem. The following in my view were the main ones. First. The operation was not regarded at Supreme Headquarters as the spearhead of a major Allied movement on the northern flank designed to isolate, and finally to occupy, the Ruhr - the one objective in the West which the Germans could not afford to lose. There is no doubt in my mind that Eisenhower always wanted to give priority to the northern thrust and to scale down the southern one. He ordered this to be done, and he thought that it was being done. It was not being done. Second. The airborne forces at Arnhem were dropped too far away from the vital objective - the bridge. It was some hours before they reached it. I take the blame for this mistake. I should have ordered Second Army and 1st Airborne Corps to arrange that at least one complete Parachute Brigade was dropped quite close to the bridge, so that it could have been captured in a matter of minutes and its defence soundly organised with time to spare. I did not do so. Third. The weather. This turned against us after the first day and we could not carry out much of the later airborne programme. But weather is always an uncertain factor, in war and in peace. This uncertainty we all accepted. It could only have been offset, and the operation made a certainty, by allotting additional resources to the project, so that it became an Allied and not merely a British project. Fourth. The 2nd S. S. Panzer Corps was refitting in the Arnhem area, having limped up there after its mauling in Normandy. We knew it was there. But we were wrong in supposing that it could not fight effectively; its battle state was far beyond our expectation. It was quickly brought into action against the 1st Airborne Division.”

Bernard Montgomery, 1st Viscount Montgomery of Alamein (1887–1976) British Army officer, Commander of Allied forces at the Battle of El Alamein

Concerning Operation Market Garden in his autobiography, 'The Memoirs of Field Marshal Montgomery' (1958)

Kenneth Arrow photo

“Uncertainty means that we do not have a complete description of the world which we fully believe to be true.”

Kenneth Arrow (1921–2017) American economist

Source: 1970s-1980s, The Limits Of Organization (1974), Chapter 2, Organization And Information, p. 34

John Elkann photo

“Many things are linked to being able to live with uncertainty, …with paradoxes. But this can be a strength of an organisation and a situation.”

John Elkann (1976) Italian businessman

"Unlikely heir who saved the family jewels" http://www.ft.com/cms/s/0/0693507a-4830-11e0-b323-00144feab49a.html#axzz1GZU7VVRA, Financial Times, 03-06-11

Denis Healey photo
Joshua Fernandez photo

“When a broad and significant change occurs in the organization, the first question many people ask is “What's in it for me?” or “What's going to happen to me? This is an indication of the anxiety that occurs when people are faced with the uncertainty associated with organizational change.”

David A. Nadler (1948–2015) American organizational theorist

David A Nadler (2010), "Techniques for the management of change," Robert Golembiewski (ed.) Handbook of Organizational Consultation, p. 1067; Quoted in: Diane Dormant, ‎Joe Lee (2011). The Chocolate Model of Change.

August-Wilhelm Scheer photo

“In an economy where the only certainty is uncertainty, the one sure source of lasting competitive advantage is knowledge.”

Ikujiro Nonaka (1935) Japanese business theorist

Ikujiro Nonaka (1991), "The Knowledge-Creating Company", Harvard Business Review 69 (6 Nov-Dec): 96–104

Viktor Lutze photo
Paul Davidson photo

“I quote somewhere a correspondence with Ken Arrow, after he wrote Arrow and Hahn. I wrote to him and I said that the trouble is that neoclassical economists confuse risk with uncertainty. Uncertainty means non-probabilistic. And he said, 'Quite true, you're quite correct that Keynes is much more fruitful, but the trouble with the General Theory is, those things that were fruitful couldn't be developed into a nice precise analytical statement, and those things that could were retrogressions from Keynes but could be developed into a nice precise analytical statement.' That's why mainstream economics went that route. And my answer is, I would hope that even Nobel Prize winners didn't believe that regression is growth, which it clearly isn't. But that's right. The fear that everybody has, you see, is nihilism: you won't be able to say what's going to happen. Well, evolutionists don't worry about being unable to predict. You ask the evolutionists, who tell you what happened in the past, just what next species is going to appear, and the answer is, anything could. Right? Does that bother people? Explanation is the first thing in science. If you can't explain, you don't have anything. But you needn't necessarily predict. Now, if you know the future's uncertain, what does that mean? It means basically, the way Hicks put it in his later years, that humans have free will. The human system isn't deterministic or stochastic, which is deterministic with a random error. Humans can do thins to change the world.”

Paul Davidson (1930) Post Keynesian economist

quoted in Conversations with Post Keynesians (1995) by J. E. King

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“"Information" in most, if not all, of its connotations seems to rest upon the notion of selective power. The Shannon theory regards the information source, in emitting the signals (signs), as exerting a selective power upon the ensemble of messages. for example, observes that what people value in a source of information (i. e., what they are prepared to pay for) depends upon its exclusiveness and prediction power; he cites instances of a newspaper editor hoping for a "scoop" and a racegoer receiving information from a tipster. "Exclusiveness" here implies the selecting of that one particular recipient out of the population, while the "prediction" value of information rests upon the power it gives to the recipient to select his future action, out of the whole range of prior uncertainty as to what action to take. Again, signs have the power to select responses in people, such responses depending upon a totality of conditions. Human communication channels consist of individuals in conversation, or in various forms of social intercourse. Each individual and each conversation is unique; different people react to signs in different ways, depending each upon their own past experiences and upon the environment at the time. It is such variations, such differences, which gives rise to the principal problems in the study of human communication.”

Colin Cherry (1914–1979) British scientist

Source: On Human Communication (1957), Syntactic, Semantic, and Pragmatic Information, p. 244-5 Source: See Weaver's section of reference 297. Source: (1951). Lectures on Communication Theory, M.I.T. Press, Cambridge, Mass.
Ref: en.wikiquote.org - Colin Cherry / Quotes / On Human Communication (1957) / Syntactic, Semantic, and Pragmatic Information

John Dewey photo

“Individuality, conceived as a temporal development involves uncertainty, indeterminacy, or contingency. Individuality is the source of whatever is unpredictable in the world.”

John Dewey (1859–1952) American philosopher, psychologist, and educational reformer

Time and Individuality (1940)

“The main problem actors face is uncertainty caused by difficulties in finding suppliers and customers and in controlling their own firm.”

Neil Fligstein (1951) American sociologist

Source: The architecture of markets, 2001, p. 16

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Isaac Asimov photo

“Inspect every piece of pseudoscience and you will find a security blanket, a thumb to suck, a skirt to hold. What does the scientist have to offer in exchange? Uncertainty! Insecurity!”

Isaac Asimov (1920–1992) American writer and professor of biochemistry at Boston University, known for his works of science fiction …

Asimov's Guide to Science (1972), p. 15
General sources

“Using the scanty means at my disposal I attempted to paint the room together with several objects that I had gathered together, white on white. The white room is an interior to be made devoid of any specific sensualism emanated by objects. Ultimately it is a classic white canvas expanded into three-dimensional space. It was in these surroundings that I rolled across the room, my body wrapped up in pieces of white cloth like a pile of parcels. The pieces of cloth unwound themselves from my tense body, which for a long time remained in a catatonic position, with the soles of both my feet stuck as it were to the wall. […] I had planned to do some bodypainting for the second part of the performance. […] At first I poured black paint over the white objects, I painted Anni with the aim of making a “living painting”. But gradually a certain uncertainty crept in. This was caused by jealous fight between two photographers, which ended by one of them leaving the room in a rage. […] My unease increased, as I became aware of the defects in my “score”-and should this not have any, the mistakes in the way I was translating it into actions. Recognising this, I succumbed to a fit of painting which was like an instinct breaking through. I jammed myself into a step-ladder that had fallen over and on which I had previously done the most dreadful gymnastic exercises, and daubed the walls in frantic despair-until I was exhausted. The very last hour of “informel.””

Günter Brus (1938) Austrian artist

Mühl angrily ridiculed my relapse into a “technique” that had to be overcome.
Source: Nervous Stillness on the Horizon (2006), P. 120 (1985)

Orrin H. Pilkey photo

“We send our [peacekeepers] off to some disputed zone, full of local intrigue and power blocs and uncertainty and danger, and they are supposed to save lives not with their weapons, but through their competence and their character. And they do it.”

Romeo LeBlanc (1927–2009) Canadian politician

Source: speech on the occasion of the presentation of the insignia of the Order of Military Merit, February 5, 1997

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“With uncertainty in oil markets, a buildup of speculative pressures and the large U. S. current account deficit, there is a real possibility that Paulson's crisis-management skills will be tested.”

Lawrence H. Summers (1954) Former US Secretary of the Treasury

David Ignatius (May 31, 2006) "Watching the Yellow Flags", The Washington Post, p. A19.
2000s

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Stanley A. McChrystal photo

“As the story unfolds many things appear: extraordinary sacrifice and teamwork, often alongside an atmosphere of mistrust, uncertainty, media scrutiny, and politics. There is a temptation to seek a single hero or culprit- a person, group, or policy- that emerges as the decisive factor. This makes for better intrigue, but it's a false drama.”

Stanley A. McChrystal (1954) American general

Source: My Share Of The Task (2013), p. 278
Context: As the story unfolds many things appear: extraordinary sacrifice and teamwork, often alongside an atmosphere of mistrust, uncertainty, media scrutiny, and politics. There is a temptation to seek a single hero or culprit- a person, group, or policy- that emerges as the decisive factor. This makes for better intrigue, but it's a false drama. To do so is to oversimplify the war, the players, and Afghanistan itself. Because despite their relevance as contributing factors, I found no single personality, decision, relationship, or event that determined the outcome or even dominated the direction of events. Afghanistan did that. Only Afghanistan, with her deep scars and opaque complexity, emerged as the essential reality and dominant character. On her brutal terrain, and in the minds of her people, the struggle was to be waged and decided. No outcome was preordained, but nothing would come easily. Few things of value do.

John Dalberg-Acton, 1st Baron Acton photo

“No obstacle has been so constant, or so difficult to overcome, as uncertainty and confusion touching the nature of true liberty.”

John Dalberg-Acton, 1st Baron Acton (1834–1902) British politician and historian

The History of Freedom in Antiquity (1877)
Context: No obstacle has been so constant, or so difficult to overcome, as uncertainty and confusion touching the nature of true liberty. If hostile interests have wrought much injury, false ideas have wrought still more; and its advance is recorded in the increase of knowledge, as much as in the improvement of laws.<!--p.2

Richard Feynman photo

“The scientist has a lot of experience with ignorance and doubt and uncertainty, and this experience is of very great importance, I think.”

Richard Feynman (1918–1988) American theoretical physicist

The Value of Science (1955)
Context: The scientist has a lot of experience with ignorance and doubt and uncertainty, and this experience is of very great importance, I think. When a scientist doesn’t know the answer to a problem, he is ignorant. When he has a hunch as to what the result is, he is uncertain. And when he is pretty darn sure of what the result is going to be, he is still in some doubt. We have found it of paramount importance that in order to progress we must recognize our ignorance and leave room for doubt. Scientific knowledge is a body of statements of varying degrees of certainty — some most unsure, some nearly sure, but none absolutely certain. Now, we scientists are used to this, and we take it for granted that it is perfectly consistent to be unsure, that it is possible to live and not know. But I don’t know whether everyone realizes this is true. Our freedom to doubt was born out of a struggle against authority in the early days of science. It was a very deep and strong struggle: permit us to question — to doubt — to not be sure. I think that it is important that we do not forget this struggle and thus perhaps lose what we have gained.

Oliver Wendell Holmes photo

“You can never be too cautious in your prognosis, in the view of the great uncertainty of the course of any disease not long watched, and the many unexpected turns it may take.”

Oliver Wendell Holmes (1809–1894) Poet, essayist, physician

Valedictory Address to medical graduates at Harvard University (10 March 1858), published in The Boston Medical and Surgical Journal Vol. LVIII, No. 8 (25 March 1858), p. 158; this has also been paraphrased "Beware how you take away hope from another human being".
Context: You can never be too cautious in your prognosis, in the view of the great uncertainty of the course of any disease not long watched, and the many unexpected turns it may take.
I think I am not the first to utter the following caution : —
Beware how you take away hope from any human being. Nothing is clearer than that the merciful Creator intends to blind most people as they pass down into the dark valley. Without very good reasons, temporal or spiritual, we should not interfere with his kind arrangements. It is the height of cruelty and the extreme of impertinence to tell your patient he must die, except you are sure that he wishes to know it, or that there is some particular cause for his knowing it. I should be especially unwilling to tell a child that it could not recover; if the theologians think it necessary, let them take the responsibility. God leads it by the hand to the edge of the precipice in happy unconsciousness, and I would not open its eyes to what he wisely conceals.

Carl Sagan photo

“To be certain of the existence of God and to be certain of the nonexistence of God seem to me to be the confident extremes in a subject so riddled with doubt and uncertainty as to inspire very little confidence indeed.”

Carl Sagan (1934–1996) American astrophysicist, cosmologist, author and science educator

Conversations with Carl Sagan (2006) http://books.google.ca/books?id=gJ1rDj2nR3EC&pg=PA70&redir_esc=y#v=onepage&q&f=false, edited by Tom Head, p. 70
Context: Those who raise questions about the God hypothesis and the soul hypothesis are by no means all atheists. An atheist is someone who is certain that God does not exist, someone who has compelling evidence against the existence of God. I know of no such compelling evidence. Because God can be relegated to remote times and places and to ultimate causes, we would have to know a great deal more about the universe than we do to be sure that no such God exists. To be certain of the existence of God and to be certain of the nonexistence of God seem to me to be the confident extremes in a subject so riddled with doubt and uncertainty as to inspire very little confidence indeed.

Robert F. Kennedy photo

“Like it or not we live in interesting times. They are times of danger and uncertainty; but they are also more open to the creative energy of men than any other time in history. And everyone here will ultimately be judged — will ultimately judge himself — on the effort he has contributed to building a new world society and the extent to which his ideals and goals have shaped that effort.”

Robert F. Kennedy (1925–1968) American politician and brother of John F. Kennedy

Day of Affirmation Address (1966)
Context: For the fortunate amongst us, the fourth danger, my friends, is comfort, the temptation to follow the easy and familiar paths of personal ambition and financial success so grandly spread before those who have the privilege of an education. But that is not the road history has marked out for us. There is a Chinese curse which says, "May he live in interesting times." Like it or not we live in interesting times. They are times of danger and uncertainty; but they are also more open to the creative energy of men than any other time in history. And everyone here will ultimately be judged — will ultimately judge himself — on the effort he has contributed to building a new world society and the extent to which his ideals and goals have shaped that effort.

Werner Heisenberg photo

“The words "position" and "velocity" of an electron… seemed perfectly well defined… and in fact they were clearly defined concepts within the mathematical framework of Newtonian mechanics. But actually they were not well defined, as seen from the relations of uncertainty.”

Werner Heisenberg (1901–1976) German theoretical physicist

Physics and Philosophy (1958)
Context: The words "position" and "velocity" of an electron... seemed perfectly well defined... and in fact they were clearly defined concepts within the mathematical framework of Newtonian mechanics. But actually they were not well defined, as seen from the relations of uncertainty. One may say that regarding their position in Newtonian mechanics they were well defined, but in their relation to nature, they were not. This shows that we can never know beforehand which limitations will be put on the applicability of certain concepts by the extension of our knowledge into the remote parts of nature, into which we can only penetrate with the most elaborate tools. Therefore, in the process of penetration we are bound sometimes to use our concepts in a way which is not justified and which carries no meaning. Insistence on the postulate of complete logical clarification would make science impossible. We are reminded... of the old wisdom that one who insists on never uttering an error must remain silent.

Joe Barton photo

“As long as I am chairman, [regulating global warming pollution] is off the table indefinitely. I don't want there to be any uncertainty about that.”

Joe Barton (1949) United States congressional representative from Texas

Congressional hearing entitled, "National Energy Policy: Coal" Subcommittee on Energy and Air Quality (March 14, 2001) http://frwebgate.access.gpo.gov/cgi-bin/useftp.cgi?IPaddress=162.140.64.21&filename=71503.wais&directory=/diskc/wais/data/107_house_hearings

Donovan photo

“In the chilly hours and minutes
Of uncertainty
I want to be
In the warm hold of your lovin' mind.”

Donovan (1946) Scottish singer, songwriter and guitarist

Catch The Wind (1965)
Context: In the chilly hours and minutes
Of uncertainty
I want to be
In the warm hold of your lovin' mind. To feel you all around me
And to take your hand
Along the sand,
Ah, but I may as well try and catch the wind.