Hard Choices Made Harder

In Henrik Andersson & Anders Herlitz (eds.), Value Incommensurability: Ethics, Risk. And Decision-Making. New York, NY: Routledge. pp. 247-266 (2021)
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Abstract

How should you evaluate your choices when you’re unsure what their outcomes will be? One popular answer is to rank your options in terms of their expected utilities. But what should you do when you think that the value of their respective outcomes might be incommensurable? In the face of incommensurable values, it no longer makes sense to speak of ranking your options according to expected utility. Are there any general principles to guide us when facing decisions of this kind? If only! This chapter develops an impossibility result: it holds that there are a handful of independently plausible constraints that no such decision theory can jointly satisfy. The result, while depressing, can be used to helpfully classify extant approaches based on which of the constraints they violate.

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Ryan Doody
Brown University

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