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Desire, Expectation and Invariance
Institute for Futures Studies, Sweden.
2016 (English)In: Mind (Print), ISSN 0026-4423, E-ISSN 1460-2113, Vol. 125, no 499, 691-725 p.Article in journal (Refereed) Published
Abstract [en]

The Desire-as-Belief thesis (DAB) states that any rational person desires a proposition exactly to the degree that she believes or expects the proposition to be good. Many people take David Lewis to have shown the thesis to be inconsistent with Bayesian decision theory. However, as we show, Lewis's argument was based on an Invariance condition that itself is inconsistent with the (standard formulation of the) version of Bayesian decision theory that he assumed in his arguments against DAB. The aim of this paper is to explore what impact the rejection of Invariance has on the DAB thesis. Without assuming Invariance, we first refute all versions of DAB that entail that there are only two levels of goodness. We next consider two theses according to which rational desires are intimately connected to expectations of (multi-levelled) goodness, and show that these are consistent with Bayesian decision theory as long as we assume that the contents of 'value propositions' are not fixed. We explain why this conclusion is independently plausible, and show how to construct such propositions.

Place, publisher, year, edition, pages
2016. Vol. 125, no 499, 691-725 p.
National Category
Philosophy
Identifiers
URN: urn:nbn:se:su:diva-137944DOI: 10.1093/mind/fzv200OAI: oai:DiVA.org:su-137944DiVA: diva2:1065250
Available from: 2017-01-14 Created: 2017-01-14 Last updated: 2017-05-22Bibliographically approved

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Stefánsson, H. Orri
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