Quotes about theory
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Alice A. Bailey photo
Jerry Coyne photo
R. G. Collingwood photo
Herbert Marcuse photo
Miyamoto Musashi photo
Margaret Atwood photo
Richard von Mises photo

“Apart from this older generation, there is scarcely a modern mathematician who still adheres without reservation to the classical theory of probability. The majority have more or less accepted the frequency definition.”

Richard von Mises (1883–1953) Austrian physicist and mathematician

Third Lecture, Critical Discussion of the Foundations of Probability, p. 81
Probability, Statistics And Truth - Second Revised English Edition - (1957)

Kent Hovind photo
George Peacock photo
Ragnar Frisch photo

“If quantum communication and quantum computation are to flourish, a new information theory will have to be developed.”

Hans Christian von Baeyer (1938) American physicist

Source: Information, The New Language of Science (2003), Chapter 25, Zeilingers Principle, Information at the root of reality, p. 231

Karl Popper photo

“Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve.”

Karl Popper (1902–1994) Austrian-British philosopher of science

Objective Knowledge: An Evolutionary Approach (1972)

George W. Bush photo
David Eugene Smith photo
Robert Maynard Hutchins photo
Adair Turner, Baron Turner of Ecchinswell photo

“Economic history matters. Students of economics should read Charles MacKay and Charles Kindleberger, and should study the history of the Wall Street Crash as well as the theory and the mathematics required to formalize it.”

Adair Turner, Baron Turner of Ecchinswell (1955) British businessman

Source: Economics after the crisis : objectives and means (2012), Ch. 2 : Financial Markets: Efficiency, Stability, and Income Distribution

Maimónides photo
Ernesto Che Guevara photo
George Dantzig photo
Kenneth N. Waltz photo

“To build a theory of international relations on accidents of geography and history is dangerous.”

Source: Man, the State, and War (1959), Chapter IV, The Second Image, p. 107

Thomas Kuhn photo

“Only when they must choose between competing theories do scientists behave like philosophers.”

Thomas Kuhn (1922–1996) American historian, physicist and philosopher

Thomas Kuhn (1970) in Logic of Discovery or Psychology of Research?, edited by [Imre Lakatos, Alan Musgrave, Criticism and the growth of knowledge, Cambridge University Press, 1970, 0521096235, 7]

Roberto Mangabeira Unger photo

“Theories without facts may be barren, but facts without theories are meaningless.”

Kenneth E. Boulding (1910–1993) British-American economist

Attributed to Kenneth Boulding in: Association of American Colleges (1955) Liberal education. Vol. 41, p. 430
1950s

Barry Mazur photo
Michael Friendly photo
Nick Herbert photo

“Though today's quantum theory shows no sign of weakness, someday it may collapse.”

Nick Herbert (1936) American physicist

Source: Quantum Reality - Beyond The New Physics, Chapter 3, Quantum Theory takes Charge, p. 52

W. Edwards Deming photo
Richard Feynman photo
John Maynard Smith photo
Lee Smolin photo

“I was joined by Carlo Rovelli, and we were able to make a full-fledged quantum theory of gravity… This became loop quantum gravity.”

Lee Smolin (1955) American cosmologist

"Loop Quantum Gravity," The New Humanists: Science at the Edge (2003)

Jayant Narlikar photo
Paul A. Samuelson photo

“Econometrics may be defined as the quantitative analysis of actual economic phenomena based on the concurrent development of theory and observation, related by appropriate methods of inference.”

Paul A. Samuelson (1915–2009) American economist

Paul Samuelson, Tjalling Koopmans, and Richard Stone. "Report of the evaluative committee for Econometrica." Econometrica- journal of the Econometric Society. (1954): 141-146.
1950s–1970s

Ilana Mercer photo

“On the unfalsifiable theory of global warming:"Evidence that contradicts the global warming theory, climate kooks enlist as evidence for the correctness of their theory; every permutation in weather patterns—warm or cold—is said to be a consequence of that warming or proof of it.”

Ilana Mercer South African writer

"Reincarnation of the Reds," http://www.ilanamercer.com/phprunner/public_article_list_view.php?editid1=108 WorldNetDaily.com, December 29, 2006, The Colorado Springs Gazette, January 17, 2007, and The Orange County Register, "The Reds Have Become Greens," January 19, 2007.
2000s, 2007

“The Atomic Theory and the Periodic Law have been given prominence, since their neglect unfailingly leads to obscurity and triviality.”

J. R. Partington (1886–1965) British chemist

A Text-Book of Inorganic Chemistry (1921)

Abul A'la Maududi photo
Imre Lakatos photo

“Where theory lags behind the facts, we are dealing with miserable degenerating research programmes.”

Imre Lakatos (1921–1974) Hungarian mathematician, philosopher

Imre Lakatos (1978, p. 6), cited in: Vernon L. Smith (1989), "Theory, experiment and economics http://pubs.aeaweb.org/doi/pdfplus/10.1257/jep.3.1.151." The Journal of Economic Perspectives 3 (1): 168.

Richard Dawkins photo
Winston S. Churchill photo
Philip K. Dick photo
Dinah Craik photo
Richard von Mises photo

“We can only hope that statisticians will return to the use of the simple, lucid reasoning of Bayes's conceptions, and accord to the likelihood theory its proper role.”

Richard von Mises (1883–1953) Austrian physicist and mathematician

Fifth Lecture, Applications in Statistics and the Theory of Errors, p. 159
Probability, Statistics And Truth - Second Revised English Edition - (1957)

Ervin László photo

“The atomic theory was not generally accepted in the time of Democritus, largely because of its deterministic character, for it allows no chance, choice, or free will.”

John Freely (1926–2017) American physicist

Source: Before Galileo, The Birth of Modern Science in Medieval Europe (2012), p. 287

Jorge Luis Borges photo
Leo Tolstoy photo

“The whole world knows that virtue consists in the subjugation of one's passions, or in self-renunciation. It is not just the Christian world, against whom Nietzsche howls, that knows this, but it is an eternal supreme law towards which all humanity has developed, including Brahmanism, Buddhism, Confucianism, and the ancient Persian religion. And suddenly a man appears who declares that he is convinced that self-renunciation, meekness, submissiveness and love are all vices that destroy humanity (he has in mind Christianity, ignoring all the other religions).

One can understand why such a declaration baffled people at first. But after giving it a little thought and failing to find any proof of the strange propositions, any rational person ought to throw the books aside and wonder if there is any kind of rubbish that would not find a publisher today. But this has not happened with Nietzsche´s books. The majority of pseudo-enlightened people seriously look into the theory of the Übermensch, and acknowledge its author to be a great philosopher, a descendant of Descartes, Leibniz and Kant. And all this has come about because the majority of pseudo-enlightened men of today object to any reminder of virtue, or to its chief premise: self-renunciation and love—virtues that restrain and condemn the animal side of their life. They gladly welcome a doctrine, however incoherently and disjointedly expressed, of egotism and cruelty, sanctioning the idea of personal happiness and superiority over the lives of others, by which they live.”

Leo Tolstoy (1828–1910) Russian writer

Source: What is Religion, of What does its Essence Consist? (1902), Chapter 11

James Meade photo
Catharine A. MacKinnon photo

“Postmodernism is an academic theory, originating in academia with an academic elite, not in the world of women and men, where feminist theory is rooted.”

Catharine A. MacKinnon (1946) American feminist and legal activist

"Postmodernism and Human Rights" (2000), p. 62
Are Women Human?: and Other International Dialogues (2006)

“Topology or relational mathematics, including non-metrical fields such as network and graph theory.”

Ludwig von Bertalanffy (1901–1972) austrian biologist and philosopher

General System Theory (1968), 4. Advances in General Systems Theory

Gino Severini photo
Igor Ansoff photo
Miguel de Unamuno photo
John Herschel photo
Peter Sloterdijk photo
Jerzy Neyman photo
Nassim Nicholas Taleb photo

“The same past data can confirm a theory and its exact opposite! If you survive until tomorrow, it could mean that either a) you are more likely to be immortal or b) that you are closer to death.”

Nassim Nicholas Taleb (1960) Lebanese-American essayist, scholar, statistician, former trader and risk analyst

Source: The Black Swan: The Impact of the Highly Improbable (2007), p. 185

Wassily Leontief photo
Rick Perry photo
Vitruvius photo
Jean Dubuffet photo

“There are too many cogitations on Theory.... it is the malady of the epoch... Into the fire with Levi-Strauss and Michel Foucault!”

Jean Dubuffet (1901–1985) sculptor from France

critical quote in Dubuffet's letter to Jacques Berne, 22October 1970, p. 190; as cited in 'Dubuffet, Lévi-Strauss, and the Idea of Art Brut', Kent Minturn http://www.columbia.edu/cu/arthistory/faculty/Minturn/Dubuffet-Levi-Strauss.pdf, from RES: Anthropology and Aesthetics, No. 46, Polemical Objects (Autumn, 2004), p. 256
Dubuffet complains that Levi-Strauss had become too theoretical
1960-70's

Elia M. Ramollah photo
Robert Aumann photo

“"Interactive Decision Theory" would perhaps be a more descriptive name for the discipline usually called Game Theory.”

Robert Aumann (1930) Israeli-American mathematician

Robert Aumann (2000) Collected Papers: Vol. 1. p. 47

John Howard photo

“I accept that climate change is a challenge, I accept the broad theory about global warming. I am sceptical about a lot of the more gloomy predictions.”

John Howard (1939) 25th Prime Minister of Australia

Interview with Four Corners, ABC TV, 28 August 2006.

Vladimir Lenin photo
Mary Baker Eddy photo

“One cannot help but be struck by the diversity that characterizes efforts to study the management process. If it is true that psychologists like to study personality traits in terms of a person's reactions to objects and events, they could not choose a better stimulus than management science. Some feel it is a technique, some feel it is a branch of mathematics, or of mathematical economics, or of the "behavioral sciences," or of consultation services, or just so much nonsense. Some feel it is for management (vs. labor), some feel it ought to be for the good of mankind — or for the good of underpaid professors.
But this diversity of attitude, which is really characteristic of all fields of endeavor, is matched by another and more serious kind of diversity. In the management sciences, we have become used to talking about game theory, inventory theory, waiting line theory. What we mean by "theory" in this context is that if certain assumptions are valid, then such-and-such conclusions follow. Thus inventory theory is not a set of statements that predict how inventories will behave, or even how they should behave in actual situations, but is rather a deductive system which becomes useful if the assumptions happen to hold. The diversity of attitude on this point is reflected in two opposing points of view: that the important problems of management science are theoretical, and that the important problems are factual.”

C. West Churchman (1913–2004) American philosopher and systems scientist

quote in: Fremont A. Shull (ed.), Selected readings in management https://archive.org/stream/selectedreadings00shul#page/n13/mode/2up, , 1957. p. 7-8
1940s - 1950s, "Management Science — Fact or Theory?" 1956

John Gray photo
Thomas Henry Huxley photo

“Since Lord Brougham assailed Dr Young, the world has seen no such specimen of the insolence of a shallow pretender to a Master in Science as this remarkable production, in which one of the most exact of observers, most cautious of reasoners, and most candid of expositors, of this or any other age, is held up to scorn as a "flighty" person, who endeavours "to prop up his utterly rotten fabric of guess and speculation," and whose "mode of dealing with nature" is reprobated as "utterly dishonourable to Natural Science."
And all this high and mighty talk, which would have been indecent in one of Mr. Darwin's equals, proceeds from a writer whose want of intelligence, or of conscience, or of both, is so great, that, by way of an objection to Mr. Darwin's views, he can ask, "Is it credible that all favourable varieties of turnips are tending to become men?"; who is so ignorant of paleontology, that he can talk of the "flowers and fruits" of the plants of the Carboniferous epoch; of comparative anatomy, that he can gravely affirm the poison apparatus of the venomous snakes to be "entirely separate from the ordinary laws of animal life, and peculiar to themselves"…
Nor does the reviewer fail to flavour this outpouring of preposterous incapacity with a little stimulation of the odium theologicum. Some inkling of the history of the conflicts between Astronomy, Geology, and Theology, leads him to keep a retreat open by the proviso that he cannot "consent to test the truth of Natural Science by the word of Revelation;" but, for all that, he devotes pages to the exposition of his conviction that Mr. Darwin's theory "contradicts the revealed relation of the creation to its Creator," and is "inconsistent with the fulness of his glory."”

Thomas Henry Huxley (1825–1895) English biologist and comparative anatomist

If I confine my retrospect of the reception of the 'Origin of Species' to a twelvemonth, or thereabouts, from the time of its publication, I do not recollect anything quite so foolish and unmannerly as the Quarterly Review article...
Huxley's commentary on the Samuel Wilberforce review of the Origin of Species in the Quarterly Review.
1880s, On the Reception of the Origin of Species (1887)

“First let me persuade you of my metaphysics and epistemology, then my theory of science, then my ethics and social theory, and then having done all that, I will convince you of my political theory. Over the past two decades, I have become convinced that this is a mug’s game… The reason Plato, Hobbes, Marx, Mill, and Rawls (many others could be named) garner widespread attention as political theorists has much more to do with their destinations than with their starting points.”

Ian Shapiro (1956) American political theorist

Shapiro, Ian. 2011. The Real World of Democratic Theory. Princeton University Press. p. 254; As cited in: Michael A. Fotos. Vincent Ostrom’s Revolutionary Science of Association http://www.indiana.edu/~workshop/colloquia/materials/papers/Fotos_VO's%20RevolutionaryScienceOfAssociation_15Mar2013.pdf, Lecturer in Political Science, Ethics, Politics, and Economics Yale University, New Haven CT : About Vincent Ostrom.

Kenneth N. Waltz photo

“To Marx the claim of the theory of ideology is that all doctrine is a derivative of social circumstance.”

Bernard Crick (1929–2008) British political theorist and democratic socialist

Source: In Defence Of Politics (Second Edition) – 1981, Chapter 2, A Defence Of Politics Against Ideology, p. 38.

Jason Brennan photo
Jacob Bronowski photo
Hannah Arendt photo

“I've begun so late, really only in recent years, to truly love the world… Out of gratitude, I want to call my book on political theories Amor Mundi.”

Hannah Arendt (1906–1975) Jewish-American political theorist

Speaking of her book The Human Condition, as quoted in Hannah Arendt: For Love of the World (2004) by Elisabeth Young-Bruehl, p. xxiv.

Edward Said photo
Hendrik Lorentz photo
Thomas Little Heath photo
Noam Cohen photo

“As a fresh wave of Ebola fear grips the American public, the Internet is rife with conspiracy theories, supposed miracle cures and Twitter posts of dread. But amid the fear mongering are several influential sites that are sticking to the facts about Ebola. Millions have come to rely on these sites, including those run by the Centers for Disease Control and Prevention, the World Health Organization and Wikipedia.”

Noam Cohen (1999) American journalist

[Noam, Cohen, http://www.nytimes.com/2014/10/27/business/media/wikipedia-is-emerging-as-trusted-internet-source-for-information-on-ebola-.html, The New York Times, October 26, 2014, Wikipedia Emerges as Trusted Internet Source for Ebola Information, October 29, 2014]

“Only yesterday the practical things of today were decried as impractical, and the theories which will be practical tomorrow will always be branded as valueless games by the practical man of today.”

William Feller (1906–1970) Croatian-American mathematician

Introduction, The Nature of Probability Theory, p. 6.
An Introduction To Probability Theory And Its Applications (Third Edition)

Albert Einstein photo

“Whether you can observe a thing or not depends on the theory which you use. It is the theory which decides what can be observed.”

Albert Einstein (1879–1955) German-born physicist and founder of the theory of relativity

Objecting to the placing of observables at the heart of the new quantum mechanics, during Heisenberg's 1926 lecture at Berlin; related by Heisenberg, quoted in Unification of Fundamental Forces (1990) by Abdus Salam ISBN 0521371406
1920s

Noam Chomsky photo