In this paper, I enter the debate between those who hold that our normative uncertainty matters for what we ought to do, and those who hold that only our descriptive uncertainty matters. I argue that existing views in both camps have unacceptable implications in cases where our descriptive beliefs depend on our normative beliefs. I go on to propose a fix which is available only to those who hold that normative uncertainty matters, ultimately leaving the challenge as a threat to (...) recent skepticism about such views. (shrink)

How should you decide what to do when you're uncertain about basic normative principles (e.g., Kantianism vs. utilitarianism)? A natural suggestion is to follow some "second-order" norm: e.g., "comply with the first-order norm you regard as most probable" or "maximize expected choiceworthiness". But what if you're uncertain about second-order norms too -- must you then invoke some third-order norm? If so, it seems that any norm-guided response to normative uncertainty is doomed to a vicious regress. In this paper, I aim (...) to rescue second-order norms from this threat of regress. I first elaborate and defend the suggestion some philosophers have entertained that the regress problem forces us to accept normative externalism, the view that at least one norm is incumbent on agents regardless of their beliefs or evidence concerning that norm. But, I then argue, we need not accept externalism about first-order (e.g., moral) norms, thus closing off any question of what an agent should do in light of her normative beliefs. Rather, it is more plausible to ascribe external force to a single, second-order rational norm: the enkratic principle, correctly formulated. This modest form of externalism, I argue, is both intrinsically well-motivated and sufficient to head off the threat of regress. (shrink)

According to the traditional Bayesian view of credence, its structure is that of precise probability, its objects are descriptive propositions about the empirical world, and its dynamics are given by conditionalization. Each of the three essays that make up this thesis deals with a different variation on this traditional picture. The first variation replaces precise probability with sets of probabilities. The resulting imprecise Bayesianism is sometimes motivated on the grounds that our beliefs should not be more precise than the evidence (...) calls for. One known problem for this evidentially motivated imprecise view is that in certain cases, our imprecise credence in a particular proposition will remain the same no matter how much evidence we receive. In the first essay I argue that the problem is much more general than has been appreciated so far, and that it’s difficult to avoid without compromising the initial evidentialist motivation. The second variation replaces descriptive claims with moral claims as the objects of credence. I consider three standard arguments for probabilism with respect to descriptive uncertainty—representation theorem arguments, Dutch book arguments, and accuracy arguments—in order to examine whether such arguments can also be used to establish probabilism with respect to moral uncertainty. In the second essay, I argue that by and large they can, with some caveats. First, I don’t examine whether these arguments can be given sound non-cognitivist readings, and any conclusions therefore only hold conditional on cognitivism. Second, decision-theoretic representation theorems are found to be less convincing in the moral case, because there they implausibly commit us to thinking that intertheoretic comparisons of value are always possible. Third and finally, certain considerations may lead one to think that imprecise probabilism provides a more plausible model of moral epistemology. The third variation considers whether, in addition to conditionalization, agents may also change their minds by becoming aware of propositions they had not previously entertained, and therefore not previously assigned any probability. More specifically, I argue that if we wish to make room for reflective equilibrium in a probabilistic moral epistemology, we must allow for awareness growth. In the third essay, I sketch the outline of such a Bayesian account of reflective equilibrium. Given that this account gives a central place to awareness growth, and that the rationality constraints on belief change by awareness growth are much weaker than those on belief change by conditionalization, it follows that the rationality constraints on the credences of agents who are seeking reflective equilibrium are correspondingly weaker. (shrink)

Subjective rightness (or ‘ought’ or obligation) seems to be the sense of rightness that should be action guiding where more objective senses fail. However, there is an ambiguity between strong and weak senses of action guidance. No general account of subjective rightness can succeed in being action guiding in a strong sense by providing an immediately helpful instruction, because helpfulness always depends on the context. Subjective rightness is action guiding in a weaker sense, in that it is always accessible and (...) comprehensible to the agent. Hence traditional belief formulations say roughly, “do what you believe is best.” This is not yet a satisfactory formulation, because it cannot make sense of our ongoing subjective duty to improve our beliefs. The notion of ‘trying’ does capture the dynamic and diachronic nature of our subjective obligation. Thus, we should formulate subjective obligation in terms of trying: “try to do well by morality.”. (shrink)

According to objectivism about the practical 'ought', what one ought to do depends on all the facts; according to perspectivism, it depends only on epistemically available facts. This essay presents a new argument against objectivism. The first premise says that it is at least sometimes possible for a normative theory to correctly guide action. The second premise says that, if objectivism is true, this is never possible. From this it follows that objectivism is false. Perspectivism, however, turns out to be (...) compatible with the plausible assumption about guidance. I defend the two premises on the basis of an account of what it is for a normative theory to guide action. Central to this account is the idea that correct action-guidance involves correct practical reasoning from a normative theory to an action, which requires that agents have the capacity to believe for the right reasons. Since objectivists about the practical 'ought' are committed to objectivism about the epistemic 'ought', it follows that agents lack this capacity and so are in principle unable to be correctly guided by a normative theory. This shows that recent attempts to reconcile objectivism with action-guidance are unsuccessful, which all assume that, if objectivism is true, it is at least sometimes possible for a normative theory to correctly guide action. (shrink)