Probability Logic and Logical Probability
نویسنده
چکیده
Many writers who entertain the use of subjective probability or credal probability for, among other things, the evaluation of expected values of options in decision problems insist that such credal probability judgments should be determined by the agent’s “available evidence” or “available knowledge”. Notable 20 century examples are H. Jeffreys (1921, 1951), J.M. Keynes (1921), R. Carnap (1950, 1962, and 1971) and H.E.Kyburg (1961, 1974, 2001). Typically these authors restricted evidence to the results of observation and experimentation. I am skeptical of the clarity of this restriction and would include in the available knowledge theoretical presuppositions and other so called-background information.
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