Deductions Quotes

• Intuition is the undoubting conception of a pure and attentive mind, which arises from the light of reason alone, and is more certain than deduction.

  Rene Descartes

  Light, Intuition, Mind

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• The two operations of our understanding, intuition and deduction, on which alone we have said we must rely in the acquisition of knowledge.

  Rene Descartes

  Math, Two, Understanding

  RENE DESCARTES (1952). “RULES FOR THE DIRECTION OF THE MIND DISCOURSE ON THE METHOD MEDITATIONS ON FIRST PHILOSOPHY OBJECTIONS AGAINST THE MEDITATIONS AND REPLIES THE GEOMETRY”

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• Eliminate all other factors, and the one which remains must be the truth.

  Arthur Conan Doyle

  Holmes, Remains, Factors

  Arthur Conan Doyle (2012). “The Sherlock Holmes Archives (incl. The Truth About Sherlock Holmes)”, p.107, Jazzybee Verlag

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• There is a tradition of opposition between adherents of induction and of deduction. In my view it would be just as sensible for the two ends of a worm to quarrel.

  Alfred North Whitehead

  Math, Science, Views

  Alfred North Whitehead (1929). “The Aims of Education & Other Essays”

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• Observation and experiment for gathering material, induction and deduction for elaborating it: these are are only good intellectual tools.

  Francis Bacon

  Science, Intellectual, Tools

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• It is a capital mistake to theorize before you have all the evidence. It biases the judgment.

  Arthur Conan Doyle

  Education, Mistake, Science

  Study in Scarlet (1888) ch. 3

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• As a citizen, you have an obligation to the countrys tax system, but you also have an obligation to yourself to know your rights under the law and possible tax deductions -- and to claim every one of them.

  Donald Alexander

  Rights, Law, Citizens

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• Knowledge is the accumulation of facts wisdom is the deduction from these facts of useful laws, a process which can only take place by comparing the facts in one compartment with those in all others, thus giving a vision of the whole.

  Vera Stanley Alder

  Law, Giving, Vision

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• There is nothing like first-hand evidence.

  Arthur Conan Doyle

  Hands, Firsts, Evidence

  Sir Arthur Conan Doyle (2013). “Collected Works of Sir Arthur Conan Doyle (Delphi Classics)”, p.42, Delphi Classics

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• Both induction and deduction, reasoning from the particular and the general, and back again from the universal to the specific, form the essence to scientific thinking.

  Hans Christian von Baeyer

  Thinking, Essence, Form

  Hans Christian Von Baeyer (2004). “Information: The New Language of Science”, p.138, Harvard University Press

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• In the beginning (if there was such a thing), God created Newton's laws of motion together with the necessary masses and forces. This is all; everything beyond this follows from the development of appropriate mathematical methods by means of deduction.

  Albert Einstein

  God, Mean, Science

  Albert Einstein, Stephen W. Hawking (2007). “A Stubbornly Persistent Illusion: The Essential Scientific Works of Albert Einstein”, p.346, Running Press

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• It is an old maxim of mine that when you have excluded the impossible, whatever remains, however improbable, must be the truth.

  Arthur Conan Doyle

  Inspirational, Truth, Philosophy

  "The Adventure of the Beryl Coronet" (1892).

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• You must therefore zealously guard in his mind the curious assumption 'My time is my own'. Let him have the feeling that he starts each day as the lawful possessor of twenty-four hours. Let him feel as a grievous tax that portion of this property which he has to make over to him employers, and as a generous donation that further portion which h allows to religious duties. But what he must never be permitted to doubt is that the total from which these deductions have been made was, in some mysterious sense, his own personal birthright.

  C. S. Lewis

  Religious, Feelings, Doubt

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• Few of us ever test our powers of deduction, except when filling out an income tax form

  Laurence J. Peter

  Income, Irs, Taxation

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• Whatever lies beyond the limits of experience, and claims another origin than that of induction and deduction from established data, is illegitimate.

  George Henry Lewes

  Lying, Data, Principles

  George Henry Lewes (1874). “Problems of Life and Mind: The method of science and its application to metaphysics. The rules of philosophising. Psychological principles. The limitations of knowledge”, p.17

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• Intellect begins with the observation of nature, proceeds to memorize and classify the facts thus observed, and by logical deduction builds up that edifice of knowledge properly called science… But admittedly we also know by feeling, and we can combine the two faculties, and present knowledge in the guise of art.

  Herbert Read

  Art, Two, Feelings

  Herbert Read (1963). “Selected Writings: Poetry and Criticism”

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• The more outre' and grotesque an incident is the more carefully it deserves to be examined, and the very point which appears to complicate a case is, when duly considered and scientifically handled, the one which is most likely to elucidate it.

  Arthur Conan Doyle

  Incidents, Grotesque, Cases

  Arthur Conan Doyle (2016). “Sherlock Holmes: The Ultimate Collection”, p.286, Lulu.com

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• In philosophical terms, the opposite of rationalism is not irrationalism but empiricism, that is, a willingness to form beliefs on the basis of experience rather than from a priori deduction. Empirical evidence never yields the dogmatic certainty that accompanies logical deduction.

  John Quiggin

  Philosophical, Yield, Opposites

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• Note that venerable proverb: Children and fools always speak the truth. The deduction is plain: adults and wise persons never speak it.

  Mark Twain

  Wise, Children, Lying

  Mark Twain (2008). “Alonzo Fitz and Other Stories (EasyRead Comfort Edition)”, p.41, ReadHowYouWant.com

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• It would appear that the number of nonsense triplets is rather low, since we only occasionally come across them. However this conclusion is less secure than our other deductions about the general nature of the genetic code.

  Francis Crick

  Numbers, Nonsense, Lows

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• By such deductions the law of gravitation is rendered probable, that every particle attracts every other particle with a force which varies inversely as the square of the distance. The law thus suggested is assumed to be universally true.

  Isaac Newton

  Distance, Science, Squares

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• I have already explained to you that what is out of the common is usually a guide rather than a hindrance.

  Arthur Conan Doyle

  Common, Guides, Hindrance

  Sir Arthur Conan Doyle (2012). “A Study in Scarlet and The Sign of Four”, p.88, Courier Corporation

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• In the study of ideas, it is necessary to remember that insistence on hard-headed clarity issues from sentimental feeling, as it were a mist, cloaking the perplexities of fact. Insistence on clarity at all costs is based on sheer superstition as to the mode in which human intelligence functions. Our reasonings grasp at straws for premises and float on gossamers for deductions.

  Alfred North Whitehead

  Math, Ideas, Issues

  Alfred North Whitehead (1967). “Adventures of Ideas”, p.72, Simon and Schuster

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• Correct observation followed by meticulous deduction and the precise visualization of goals is vital to the success of any enterprise.

  Terry Pratchett

  Goal, Meticulous, Observation

  Terry Pratchett (2009). “The Carpet People”, p.7, Random House

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• When I run a business, and I run a business, if I don't take advantage of the five deductions that are available to me, even if you think those deductions are unfair, then I've violated my fiduciary duty.

  Rudy Giuliani

  Running, Thinking, Fiduciary

  "Meet the Press" with Chuck Todd, www.nbcnews.com. October 2, 2016.

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