Normative uncertainty without theories

Abstract

How should an agent act under normative uncertainty? We might extend the orthodox theory of rational choice to the case of uncertainty between competing normative theories. But this requires that the values assigned by different normative theories be comparable. This paper defends a strategy for avoiding the need for intertheoretic value comparisons: instead of comparing competing moral theories, I argue that values can be represented in terms of a de dicto specification of value. I provide a decision theory for de dicto values that generalises expected utility theory, and I compare the proposal with alternative strategies for avoiding the problem of intertheoretic comparisons.