Abstract
In the present paper I propose to try to prove three points, which, if they can be established, are of great importance to the logic of inductive inference. They are (1) that unless inductive conclusions be expressed in terms of probability all inductive inference involves a formal fallacy; (2) that the degree of belief which we actually attach to the conclusions of well-established inductions cannot be justified by any known principle of probability, unless some further premise about the physical world be assumed; and (3) that it is extremely difficult to state this premise so that it shall be at once plausible and non-tautologous. I believe that the first two points can be rigorously established without entering in detail into the difficult problem of what it is that probability-fractions actually measure. The third point is more doubtful, and I do not profess to have reached at present any satisfactory view about it.
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The mathematical theory of the probability of hypotheses is treated by Boole in his Laws of Thought. The problem in its most general form (where it is not assumed that h implies el, c2… en,but only that it modifies their probability) has been worked out, but not I think published, by Mr. W. E. Johnson. I take this opportunity of expressing the very great obligations which I am under to Mr. Johnson, obligations which I know are felt by all those who have had the privilege of attending his lectures on advanced logic or discussing logical problems with him. Mr. Johnson, however, must not be held responsible for the views expressed in the present paper.
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© 1968 Springer Science+Business Media Dordrecht
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Broad, C.D. (1968). The Relation between Induction and Probability. In: Induction, Probability, and Causation. Synthese Library, vol 15. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1868-4_1
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DOI: https://doi.org/10.1007/978-94-017-1868-4_1
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-8317-3
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