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Douglas_Adams

Scientific Method

“The invention of the scientific method and science is, I'm sure we'll all agree, the most powerful intellectual idea, the most powerful framework for thinking and investigating and understanding and challenging the world around us that there is, and it rests on the premise that any idea is there to be attacked. If it withstands the attack then it lives to fight another day and if it doesn't withstand the attack then down it goes. Religion doesn't seem to work like that.”
  • Source: Douglas Adams. From the speech entitled "Is There an Artificial God?"; spoken on 1998-09; spoken at the "Digital Biota 2" conference' held at Magdelene College Cambridge; online at http://www.biota.org/people/douglasadams/ (accessed 2017).

Marcus_Aurelius

Fame

“The most lasting fame will stretch but to a sorry extent; for, alas! poor transitory mortals who hand it down know little even of themselves, much less of those who died long before their time.”

Robert_N_Britcher

Limits of Testing

“The limits of software are never more obvious than in its testing. Software systems are beyond discrete and statistical analysis. A single incorrect state - out of two to the trillionth states - can down a rocket: To find such a fault in a software system would require a hundred generations of programmers - but after the first failure is found and fixed, all bets are off; they wouldn't be testing the same system anymore. We can design and build fail-safe systems, but can we know we did?”
  • Source: Britcher, Robert N. (1999). The Limits of Software: People, Projects, and Perspectives. Reading, MA: Addison Wesley. ISBN 0-201-43323-0. Page 56.

English Proverbs

Turtles All the Way Down

“Turtles all the way down”
  • Source: The exact origin of the phrase is uncertain.
    • Turtles all the way down is an expression of the problem of infinite regress.
    • The saying alludes to the mythological idea of a World Turtle that supports a flat Earth on its back. It suggests that this turtle rests on the back of an even larger turtle, which itself is part of a column of increasingly larger turtles that continues indefinitely.
    • The expression has been used to illustrate problems such as the regress argument in epistemology.

David_Epstein

Creative Constraints

“That's the thing about constraints that spur creativity: They shut down many possibilities, but stimulate more varied and novel exploration of those that remain... Given complete freedom, our very strong urge is to follow the ‘path of least resistance.’ Specifically, we do only what we have done before, or follow the first example that jumps to mind.”
  • Source: David Epstein in the book “Inside the Box: How Constraints Make Us Better”. Published 2026 by Riverhead Books. Page 58. ISBN 978-0593715734 (Ebook).

Richard_Feynman

No One Understands Quantum

“I think it is safe to say that no one understands quantum mechanics. Do not keep saying to yourself, if you can possibly avoid it, 'But how can it possibly be like that?' because you will go down the drain into a blind alley from which nobody has yet escaped. Nobody knows how it can be like that.”
  • Source: Richard Feynman, in The Character of Physical Law (1965).

Alexander_G_Fraser

Top Down Bottom Up

“In the designs I have been involved in, and which have not involved too many people, I have not been able to identify whether these have been ‘top-down’ or ‘bottom-up’. They seem to me to be more like frame stressing,”

Stephen_Hawking

Turtles All the Way Down

“A well-known scientist (some say it was Bertrand Russell) once gave a public lecture on astronomy. He described how the earth orbits around the sun and how the sun, in turn, orbits around the centre of a vast collection of stars called our galaxy. At the end of the lecture, a little old lady at the back of the room got up and said: ‘What you have told us is rubbish. The world is really a flat plate supported on the back of a giant tortoise.' The scientist gave a superior smile before replying, ‘What is the tortoise standing on?' ‘You're very clever, young man, very clever,' said the old lady. ‘But it's turtles all the way down!”

Robert_Heinlein

Scientific Method

“There are but two ways of forming an opinion in science. One is the scientific method; the other, the scholastic. One can judge from experiment, or one can blindly accept authority. To the scientific mind, experimental proof is all important and theory is merely a convenience in description, to be junked when it no longer fits. To the academic mind, authority is everything and facts are junked when they do not fit theory laid down by authority.”.
  • Source: Written by Robert A. Heinlein in the short story “Life-Line” originally published in the 1939-08 edition of “Astounding Science Fiction” magazine, page 83. Character: Dr. Pinero. Retrieved 2024-05-05 from https://www.luminist.org/archives/SF/AST.htm.

Bernardo_Kastrup

Irreducible Patterns

“If there are such irreducible macroscopic patterns, they — unlike cause and effect — may not entail relationships of strict necessity, but tendencies, affinities or dispositions instead... We cannot expect to pin down the corresponding events on the basis of empirical regularities and counterfactual dependences. Not only may these events not be consistently repeatable, the global patterns they reflect may be excluded from experiments by our very efforts to isolate the experimental setup and control its conditions. We cannot induce these acausal events at will. The best we can do is to pay attention to the world around us, in the hope of noticing one of them as it spontaneously unfolds... Next to causality, the physical world organizes itself along archetypal correspondences of meaning, which break down the barrier between world and psyche.”
  • Source: From “Decoding Jung's Metaphysics: The Archetypal Semantics of an Experiential Universe”. Written by Bernardo Kastrup. Published by IFF Books, Washington DC. Kindle Edition. Page 53. Chapter 4.

Henry_Louis_Mencken

Truth

“The truth, indeed, is something that mankind, for some mysterious reason, instinctively dislikes. Every man who tries to tell it is unpopular, and even when, by the sheer strength of his case, he prevails, he is put down as a scoundrel.”
  • Source: Mencken. Chicago Tribune (23 May 1926)

Alan_Perlis

Human Communication Limits

“A man can communicate with about five colleagues on a software project without too much difficulty. Likewise he can supervise about five people and know pretty well what they are doing. One would structure 120 people in three levels, in which no man is talking to more than about eight people, both across his level and up and down”

Antoine_de_Saint-Exupéry

Meaning of Life

“Each man must look to himself to teach him the meaning of life. It is not something discovered: it is something moulded. These prison walls that this age of trade has built up round us, we can break down. We can still run free, call to our comrades, and marvel to hear once more, in response to our call, the pathetic chant of the human voice.”
  • Source: Antoine de Saint-Exupéry, from page 48 of the book entitled "Wind, Sand and Stars". Translated from French by Lewis Galantiere. Published in 1939 by Reynal and Hitchcock. Retrieved 2018-04-22 from https://archive.org/details/in.ernet.dli.2015.264850 .

John_Steinbeck

Great Difficulty with Good Hypothesis

“There is one great difficulty with a good hypothesis. When it is completed and rounded, the corners smooth and the content cohesive and coherent, it is likely to become a thing in itself, a work of art. It is then like a finished sonnet or a painting completed. One hates to disturb it. Even if subsequent information should shoot a hole in it, one hates to tear it down because it once was beautiful and whole. One of our leading scientists, having reasoned a reef in the Pacific, was unable for a long time to reconcile the lack of a reef, indicated by soundings, with the reef his mind told him was there.”
  • Source: John Steinbeck, In John Steinbeck and Edward Flanders Ricketts Sea of Cortez: a Leisurely Journal of Travel and Research (1941), 179-80.

Thornton_Wilder

Something Eternal

“Now there are some things we all know, but we don't take'm out and look at'm very often. We all know that something is eternal. And it ain't houses and it ain't names, and it ain't earth, and it ain't even the stars... everybody knows in their bones that something is eternal, and that something has to do with human beings. All the greatest people ever lived have been telling us that for five thousand years and yet you'd be surprised how people are always losing hold of it. There's something way down deep that's eternal about every human being.”
  • Source: Thornton Wilder writing for the Stage Manager character in act three of the play 'Our Town', first published in 1938 by Coward McCann, Inc., New York.