Conditionals, comparative probability, and triviality: The conditional of conditional probability cannot be represented in the object language

Topoi 18 (2):97-116 (1999)

In this paper we examine the thesis that the probability of the conditional is the conditional probability. Previous work by a number of authors has shown that in standard numerical probability theories, the addition of the thesis leads to triviality. We introduce very weak, comparative conditional probability structures and discuss some extremely simple constraints. We show that even in such a minimal context, if one adds the thesis that the probability of a conditional is the conditional probability, then one trivializes the theory. Another way of stating the result is that the conditional of conditional probability cannot be represented in the object language on pain of trivializing the theory.
Keywords Philosophy   Philosophy   Philosophy of Science   Philosophy of Technology
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Reprint years 2004
DOI 10.1023/A:1006238120301
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Lewis’ Triviality for Quasi Probabilities.Eric Raidl - forthcoming - Journal of Logic, Language and Information:1-35.

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