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" By degree of probability we really mean, or ought to mean, degree of belief. It is true that we may, if we like, divide probability into ideal and objective, and that we must do so, in order to represent common language. "
Formal Logic: Or, The Calculus of Inference, Necessary and Probable - Página 160
de Augustus De Morgan - 1847 - 336 páginas
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The Biblical review, and Congregational magazine [formerly The ..., Volume 5

1848 - 590 páginas
...the statement so openly as I now do : and I consider that some justification of it is necessary. ' By degree of probability we really mean, or ought...probability into ideal and objective, and that we must do so, in order to represent common language. It is perfectly correct to say, " It is much more...
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The Principles of science

William Stanley Jevons - 1874 - 978 páginas
...accordingly have asserted that probability is concerned with degree or quantity of belief. De Morgan says,b ' By degree of probability we really mean or ought to mean degree of belief.' The late Professor Donkin expressed the meaning of probability as 'quantity of belief;' but I have...
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The Economy of Happiness

James MacKaye - 1906 - 578 páginas
...magnitude like length, or weight, or surface, for expectation is thus obviously variable. Again he says " By degree of probability we really mean, or ought to mean, degree of belief." And Huxley says " To have an expectation of a given event and to believe that it will happen are only...
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Scientific Method: Its Philosophy and Its Practice

Frederic William Westaway - 1912 - 474 páginas
...Theory of Probability deals with Quantity of Knowledge Jevons disagrees with De Morgan, who says that " by degree of probability we really mean or ought to mean degree of belief"; and with Donkin's opinion that probability is "quantity of belief"; for, says Jevons, " the nature...
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The Monist, Volume 31

Paul Carus - 1921 - 636 páginas
...becomes the degree of intensity of a belief. De Morgan states this position in its most radical form. "By degree of probability we really mean, or ought to mean, degree of belief," he says. "I throw away objective probability altogether and consider the word as meaning the state...
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Bayesian Analysis of Linear Models

Broemeling - 1984 - 480 páginas
...DeMorgan (1847) advance the idea of subjective probability in an informal way. For instance DeMorgan says "By degree of probability we really mean , or ought to mean , degree of belief. . . . Probability then, refers to and implies belief, more or less, and belief is but another name...
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Comparative Statistical Inference

Vic Barnett - 1999 - 418 páginas
...prevailing circumstances. Another early formulation was provided (somewhat obscurely) by de Morgan in 1847. By degree of probability we really mean, or ought to mean, degree of belief — Probability then, refers to and implies belief, more or less, and belief is but another name for...
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Charles Peirce's Empiricism, Volume 1

Justus Buchler - 2000 - 300 páginas
...assertion, a coming event, or any other matter on which absolute knowledge does not exist".1 On this view, "by degree of probability we really mean, or ought to mean, degree of belief",2 and, in development of the classical conception, the probability of each of a pair of exhaustive...
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Transactions and Proceedings of the New Zealand Institute, Volume 7

New Zealand Institute - 1875 - 714 páginas
...amount of belief given to that proposition. Thus Professor De Morgan says (Formal Logic, chap. 9): " By degree of probability we really mean, or ought...probability into ideal and objective, and that we must do so, in order to represent common language." And he adds : " I throw away objective probability...
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