“Opinion considers the opposition of what is true and false quite rigid, and, confronted with a philosophical system, it expects agreement or contradiction. And in an explanation of such a system, opinion still expects to find one or the other.”

— Georg Wilhelm Friedrich Hegel , book The Phenomenology of Spirit

Preface, § 2
The Phenomenology of Spirit (1807)

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Georg Wilhelm Friedrich Hegel 106

German philosopher 1770–1831

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

Source: 1960s - 1970s, The Systems Approach (1968), p. 231; cited in Charles Smith (2007, p. 44)

“Confronted with such a variety most philosophers try to establish one approach to the exclusion of all others. As far as they are concerned there can only be one true way- and they want to find it. Thus normative philosophers argue that knowledge is a result of the application of certain rules, they propose rules which in their opinion constitute knowledge and reject what clashes with them.”

Paul Karl Feyerabend (1924–1994) Austrian-born philosopher of science

Pg 84.
Conquest of Abundance (2001 [posthumous])

“Any philosophic explanation of Quality is going to be both false and true precisely because it is a philosophic explanation.”

Robert M. Pirsig book Zen and the Art of Motorcycle Maintenance

Source: Zen and the Art of Motorcycle Maintenance (1974), Ch. 20
Context: Any philosophic explanation of Quality is going to be both false and true precisely because it is a philosophic explanation. The process of philosophic explanation is an analytic process, a process of breaking something down into subjects and predicates. What I mean (and everybody else means) by the word ‘quality’ cannot be broken down into subjects and predicates. This is not because Quality is so mysterious but because Quality is so simple, immediate and direct.

“It is true that M. Fourier had the opinion that the principal end of mathematics was the public utility and the explanation of natural phenomena; but such a philosopher as he is should have known that the unique end of science is the honor of the human mind, and that from this point of view a question of number is as important as a question of the system of the world.”

Carl Gustav Jacob Jacobi (1804–1851) German mathematician

Letter to Legendre (July 2, 1830) in response to Fourier's report to the Paris Academy Science that mathematics should be applied to the natural sciences, as quoted in Science (March 10, 1911) Vol. 33 https://books.google.com/books?id=4LU7AQAAMAAJ&pg=PA359, p.359, with additional citations and dates from H. Pieper, "Carl Gustav Jacob Jacobi," Mathematics in Berlin (2012) p.46

“If nothing is expected of a people, that people will find it difficult to contradict that expectation”

Frederick Douglass (1818–1895) American social reformer, orator, writer and statesman

1860s, What the Black Man Wants (1865)
Context: We may be asked, I say, why we want it. I will tell you why we want it. We want it because it is our right, first of all. No class of men can, without insulting their own nature, be content with any deprivation of their rights. We want it again, as a means for educating our race. Men are so constituted that they derive their conviction of their own possibilities largely from the estimate formed of them by others. If nothing is expected of a people, that people will find it difficult to contradict that expectation. By depriving us of suffrage, you affirm our incapacity to form an intelligent judgment respecting public men and public measures; you declare before the world that we are unfit to exercise the elective franchise, and by this means lead us to undervalue ourselves, to put a low estimate upon ourselves, and to feel that we have no possibilities like other men. Again, I want the elective franchise, for one, as a colored man, because ours is a peculiar government, based upon a peculiar idea, and that idea is universal suffrage.

“I believe that at the end of the century the use of words and general educated opinion will have altered so much that one will be able to speak of machines thinking without expecting to be contradicted.”

Alan Turing Computing Machinery and Intelligence

Source: Computing Machinery and Intelligence (1950), p. 442.
Source: Computing machinery and intelligence

“Epictetus is the best authority for the explanation of the philosophical language of Antoninus and the exposition of his opinions.”

George Long (1800–1879) English classical scholar

The Philosophy of Antoninus
Context: The doctrines of Epictetus and Antoninus are the same, and Epictetus is the best authority for the explanation of the philosophical language of Antoninus and the exposition of his opinions.