logic

A Quote by Karl Raimund Popper on logic, principles, and truth

Now this principle of induction cannot be a purely logical truth like a tautology or an analytic statement. . . .

Karl Popper (1902 - 1994)

Source: Popper, The Logic of Scientific Discovery

Contributed by: Zaady

A Quote by Jules Henri Poincaré on assumptions, imagination, logic, machines, needs, and understanding

Thus, be it understood, to demonstrate a theorem, it is neither necessary nor even advantageous to know what it means. The geometer might be replaced by the "logic piano" imagined by Stanley Jevons; or, if you choose, a machine might be imagined where the assumptions were put in at one end, while the theorems came out at the other, like the legendary Chicago machine where the pigs go in alive and come out transformed into hams and sausages. No more than these machines need the mathematician know what he does.

Jules Henri Poincare (1854 - 1912)

Source: J. R. Newman (ed.) The World of Mathematics, New York: Simon and Schuster, 1956.

Contributed by: Zaady

A Quote by Joseph Conrad on hope, knowledge, life, logic, and purpose

A droll thing life is-that mysterious arrangement of merciless logic for a futile purpose. The most you can hope from it is some knowledge of yourself and that comes too late.

Joseph Conrad (1857 - 1924)

Contributed by: Zaady

A Quote by Dr. Joost A. M. Meerloo, MD on emotion, lies, logic, nonsense, reason, and war

The big lie and monotonously repeated nonsense have more emotional appeal in a cold war than logic and reason.

Joost Meerloo

Source: The Rape of the Mind: The Psychology of Thought Control, Menticide, and Brainwashing

Contributed by: Zaady

A Quote by John William Navin Sullivan on experience, god, ideas, imagination, limits, logic, mathematics, principles, science, universe, and world

The mathematician is entirely free, within the limits of his imagination, to construct what worlds he pleases. What he is to imagine is a matter for his own caprice; he is not thereby discovering the fundamental principles of the universe nor becoming acquainted with the ideas of God. If he can find, in experience, sets of entities which obey the same logical scheme as his mathematical entities, then he has applied his mathematics to the external world; he has created a branch of science.

John William Navin Sullivan (1886 - 1937)

Source: Aspects of Science, 1925.

Contributed by: Zaady

A Quote by Joe R. Lansdale on confusion, logic, and sanity

The logic of a madman is a sane man's confusion

Joe R. Lansdale

Contributed by: Zaady

A Quote by Jeremy Bentham on destiny, logic, and science

O Logic: born gatekeeper to the Temple of Science, victim of capricious destiny: doomed hitherto to be the drudge of pedants: come to the aid of thy master, Legislation.

Jeremy Bentham (1748 - 1832)

Source: J. Browning (ed.) Works.

Contributed by: Zaady

A Quote by Jawaharlal Nehru on distrust, faith, fear, generosity, logic, reason, and weapons

Logic and cold reason are poor weapons to fight fear and distrust. Only faith and generosity can overcome them.

Jawaharlal Nehru (1889 - 1964)

Contributed by: Zaady

A Quote by Jane Welsh Carlyle on dependence, force, life, logic, and nature

It is sad and wrong to be so dependent for the life of my life on any human being as I am on you; but I cannot by any force of logic cure myself at this date, when it has become second nature.

Jane Welsh Carlyle (1801 - 1866)

Source: Letter; in The Collected Letters of Thomas and Jane Welsh Carlyle, 1970.

Contributed by: Zaady

A Quote by James Russell Lowell on logic

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It ["The Ancient Mariner"] is marvellous in its mastery over that delightfully fortuitous inconsequence that is the adamantine logic of dreamland.

James Lowell (1819 - 1891)

Source: Coleridge.

Contributed by: Zaady

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