期刊
SYNTHESE
卷 191, 期 5, 页码 989-1012出版社
SPRINGER
DOI: 10.1007/s11229-013-0303-3
关键词
Finite additivity; Infinite lotteries; Coherence; Conditionalisation; de Finetti
In this paper I argue that de Finetti provided compelling reasons for rejecting countable additivity. It is ironical therefore that the main argument advanced by Bayesians against following his recommendation is based on the consistency criterion, coherence, he himself developed. I will show that this argument is mistaken. Nevertheless, there remain some counter-intuitive consequences of rejecting countable additivity, and one in particular has all the appearances of a full-blown paradox. I will end by arguing that in fact it is no paradox, and that what it shows is that conditionalisation, often claimed to be integral to the Bayesian canon, has to be rejected as a general rule in a finitely additive environment.
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