In this article, I will provide a critical overview of the form of non-deductive reasoning commonly known as “Inference to the Best Explanation” (IBE). Roughly speaking, according to IBE, we ought to infer the hypothesis that provides the best explanation of our evidence. In section 2, I survey some contemporary formulations of IBE and highlight some of its putative applications. In section 3, I distinguish IBE from C.S. Peirce’s notion of abduction. After underlining some of the essential elements of IBE, (...) the rest of the entry is organized around an examination of various problems that IBE confronts, along with some extant attempts to address these problems. In section 4, I consider the question of when a fact requires an explanation, since presumably IBE applies only in cases where some explanation is called for. In section 5, I consider the difficult question of how we ought to understand IBE in light of the fact that among philosophers, there is significant disagreement about what constitutes an explanation. In section 6, I consider different strategies for justifying the truth-conduciveness of the explanatory virtues, e.g., simplicity, unification, scope, etc., criteria which play an indispensable role in any given application of IBE. In section 7, I survey some of the most recent literature on IBE, much of which consists of investigations of the status of IBE from the standpoint of the Bayesian philosophy of science. (shrink)

I defend an inference to the best explanation (IBE) argument for anti-realism about reasons for acting based on the history of intractable disagreement in moral philosophy. The four key premises of the argument are: 1. If there were objective reasons for action, epistemically-well-situated observers would eventually converge upon them after two thousand years; 2. Contemporary philosophers, as the beneficiaries of two thousand years of philosophy, are epistemically well-situated observers; 3. Contemporary philosophers have not converged upon reasons for action; 4. Conclusion: (...) there are no objective reasons for action (IBE from the first three premises). The key premises of the IBE are (1) sentimentalism; (2) non-cognitivism about basic affects; and (3) philosophical arguments for what our reasons for action are always involve arguments that depend on a basic intuitive moral judgment (that can be explained in terms of a basic non-cognitive affect). All these premises are explored in detail, and various objections addressed. (shrink)

While many have argued that moral disagreement poses a challenge to moral knowledge, the precise nature of this challenge is controversial. Indeed, in the moral epistemology literature, there are many different versions of ‘the’ argument from moral disagreement to moral scepticism. This paper contributes to this vast literature on moral disagreement by arguing for two theses: 1. All (or nearly all) moral disagreement arguments share an underlying structure; and, 2. All moral disagreement arguments that satisfy this underlying structure cannot establish (...) moral scepticism because this underlying structure leads to a previously unrecognized reductio ad absurdum. In short, I argue that this reductio argument (very likely) refutes all versions of the moral disagreement to moral scepticism argument in one fell swoop. (shrink)

SPECIAL ISSUE ON DISAGREEMENTS: The fact of moral disagreement is often raised as a problem for moral realism. The idea is that disagreement amongst people or communities on moral issues is to be taken as evidence that there are no objective moral facts. While the fact of ‘folk’ moral disagreement has been of interest, the fact of expert moral disagreement, that is, widespread and longstanding disagreement amongst expert moral philosophers, is even more compelling. In this paper, I present three arguments (...) against the anti-realist explanation for widespread and longstanding disagreement amongst expert moral philosophers. Each argument shows the argument from expert disagreement for moral anti-realism, that is, denial of morality’s objectivity, to be in one way or another self-undermining. I conclude that widespread and longstanding disagreement amongst expert moral philosophers is not a problem for moral realism. (shrink)

The existence of fundamental moral disagreements is a central problem for moral realism and has often been contrasted with an alleged absence of disagreement in mathematics. However, mathematicians do in fact disagree on fundamental questions, for example on which set-theoretic axioms are true, and some philosophers have argued that this increases the plausibility of moral vis-à-vis mathematical realism. I argue that the analogy between mathematical and moral disagreement is not as straightforward as those arguments present it. In particular, I argue (...) that pluralist accounts of mathematics render fundamental mathematical disagreements compatible with mathematical realism in a way in which moral disagreements and moral realism are not. 11. (shrink)

We develop an argument for a novel version of moral intuitionism centered on the claim that moral intuitions are trustworthy. Our argument employs an epistemic principle that we call the Trustworthiness Criterion, a distinctive feature of which is its emphasis on oft-neglected social dimensions of cognitive states, including non-doxastic attitudes such as intuition. Thus our argument is not that moral intuitions are trustworthy because they are regress-stoppers, or because they are innocent until proven guilty, or because denying their epistemic contribution (...) would be self-defeating, or because they are presupposed in rational inference, or because they are analogous to perceptions, or because they are based on understanding—individualistic claims that have elsewhere been used (controversially) in defense of the thesis that moral intuitions are in good epistemic standing. Rather, our argument appeals to the idea that moral intuitions are trustworthy because they are the outputs of a cognitive practice, which has epistemically-fecund social elements, that is in good working order. (shrink)

Arguments from disagreement against moral realism begin by calling attention to widespread, fundamental moral disagreement among a certain group of people. Then, some skeptical or anti-realist-friendly conclusion is drawn. Chapter 2 proposes that arguments from disagreement share a structure that makes them vulnerable to a single, powerful objection: they self-undermine. For each formulation of the argument from disagreement, at least one of its premises casts doubt either on itself or on one of the other premises. On reflection, this shouldn’t be (...) surprising. These arguments are intended to support very strong metaphysical or epistemological conclusions about morality. They must therefore employ very strong metaphysical or epistemological premises. But, given the pervasiveness of disagreement in philosophy, especially about metaphysics and epistemology, very strong premises are virtually certain to be the subject of widespread, intractable disagreement—precisely the sort of disagreement that proponents of these arguments think undermine moral claims. Thus, these arguments undermine their own premises. If Chapter 2’s argument is sound, it provides realists with a single, unified strategy for responding to any existing or forthcoming arguments from disagreement. (shrink)

In On What Matters, Derek Parfit argues that Nietzsche does not disagree with central normative beliefs that ‘we’ hold. Such disagreement would threaten Parfit’s claim that normative beliefs are known by intuition. However, Nietzsche defends a conception of well-being that challenges Parfit’s normative claim that suffering is bad in itself for the sufferer. Nietzsche recognizes the phenomenon of ‘growth through suffering’ as essential to well-being. Hence, removal of all suffering would lead to diminished well-being. Parfit claims that if Nietzsche understood (...) normative concepts in Parfit’s objectivist sense, he would not disagree with the claim that suffering is bad in itself – that intrinsic facts about suffering count in favour of our not wanting it. I argue that Nietzsche would disagree. Suffering for Nietzsche is not merely instrumentally necessary for psychological growth, nor is it easy to construe it as something bad in itself that contributes value as part of a good whole. Suffering that can be given meaning through growth is something we have reason to want. Suffering that remains brute and uninterpreted is something we have reason not to want. But for Nietzsche, suffering as such has no invariant value across all contexts. (shrink)

This essay offers an interpretation and partial defense of Nietzsche's idea that moralities and moral judgments are “sign-languages” or “symptoms” of our affects, that is, of our emotions or feelings. According to Nietzsche, as I reconstruct his view, moral judgments result from the interaction of two kinds of affective responses: first, a “basic affect” of inclination toward or aversion from certain acts, and then a further affective response to that basic affect. I argue that Nietzsche views basic affects asnoncognitive, that (...) is, as identifiable solely by how they feel to the subject who experiences the affect. By contrast, I suggest that meta-affects sometimes incorporate acognitivecomponent like belief. After showing how this account of moral judgment comports with a reading of Nietzsche's moral philosophy that I have offered in previous work, I conclude by adducing philosophical and empirical psychological reasons for thinking that Nietzsche's account of moral judgment is correct. (shrink)

Our project in this essay is to showcase nonnaturalistic moral realism’s resources for responding to metaphysical and epistemological objections by taking the view in some new directions. The central thesis we will argue for is that there is a battery of substantive moral propositions that are also nonnaturalistic conceptual truths. We call these propositions the moral fixed points. We will argue that they must find a place in any system of moral norms that applies to beings like us, in worlds (...) similar to our own. By committing themselves to true propositions of these sorts, nonnaturalists can fashion a view that is highly attractive in its own right, and resistant to the most prominent objections that have been pressed against it. (shrink)

Theoria, Volume 88, Issue 4, Page 850-867, August 2022.

According to the argument from moral disagreement, the existence of widespread or persistent moral disagreement is best explained by, and thus supports, the view that there are no objective moral truths. One of the most common charges against this argument is that it “overgeneralises”: it implausibly forces its proponents to also deny the existence of objective truths about certain matters of physics, history, philosophy, etc. (“companions in guilt” objections) or even about the argument’s own conclusion or its own soundness (“self-defeat” (...) objections). My aim in this article is to provide a detailed clarification and assessment of this overgeneralisation charge. Various (mostly empirical) issues relevant to assessing the above objections have so far not been sufficiently investigated. Nevertheless, there are good reasons to believe that realists have exaggerated the significance of their overgeneralisation charge. Both its companions in guilt and its self-defeat versions likely fail. (shrink)

There is a long tradition comparing moral knowledge to mathematical knowledge. In this paper, I discuss apparent similarities and differences between knowledge in the two areas, realistically conceived. I argue that many of these are only apparent, while others are less philosophically significant than might be thought. The picture that emerges is surprising. There are definitely differences between epistemological arguments in the two areas. However, these differences, if anything, increase the plausibility of moral realism as compared to mathematical realism. It (...) is hard to see how one might argue, on epistemological grounds, for moral antirealism while maintaining commitment to mathematical realism. But it may be possible to do the opposite. (shrink)

This dissertation is a defence of metaphysical ethical naturalism according to which there is a moral reality which is part of the natural world. The implication of this view is that moral properties, such as moral goodness, justice, compassion and so forth are part of the natural world, and inquiries concerning these moral entities are conducted in similar empirical ways of reasoning to that in which scientific inquiries are conducted. I defend metaphysical ethical naturalism by a variety of explanationist argument (...) in the tradition of Cornell realism. I examine preceding proposals for this argument, and focus on one version of it, which I call ‘the abductive argument for moral realism’. Although there was a suggestion about the abductive argument, the argument has not been discussed enough in the literature. This dissertation is a defence and discussion about the abductive argument which has not been properly examined. The defence of the argument requires the examination of how first-order ethical theory can be developed in the similar empirical ways scientific theories are developed. This will be an attempt to show the analogy between scientific inquiries and ethical inquiries. Describing the analogy between science and ethics, I will argue that the analogy can be best explained in terms of the approximate truth of normative theory which implies the existence of mind-independent natural moral properties. (shrink)

In this paper, I treat the question of the meta-axiological standing of Nietzsche's own values, in the service of which he criticizes morality. Does Nietzsche, I ask, regard his perfectionistic valorization of human excellence and cultural flourishing over other ideals to have genuine evaluative standing, in the sense of being correct, or at least adequate to a matter-of-fact? My goal in this paper is modest, but important: it is not to attribute to Nietzsche some sophisticated meta-axiological view, because I am (...) doubtful that he has one. It is, however, to show that Nietzsche's texts do not necessitate the sceptical meta-axiological positions that have been attributed to him in the recent secondary literature. And it is thereby to suggest that we need not give up on the idea that Nietzsche takes the values he champions to have genuine evaluative standing – not because he has some sophisticated realist theory to this effect, but in a more philosophically unreflective way. (shrink)

A growing literature in recent epistemology leverages the fact of persistent, systematic disagreement among philosophers to reach deeply skeptical conclusions, not just about philosophical propositions, but about the practice of philosophy itself. This article argues that a version of this argument is implicit in Nietzsche’s Beyond Good and Evil, and that Nietzsche is best read as occupying a stance that would be called “conciliationist” today. The only sincere effort to date to attribute to Nietzsche a skeptical position on the basis (...) of disagreement, I argue, both overcommits him in some ways and undercommits him in others. Correctly assessing his target and scope and appreciating the conciliationist strain in Nietzsche’s thought improves our understanding of his philosophical project. (shrink)

The main purpose of the paper is to present a new framework of meta-ethics which I call the Functional Model of Analysis. It presupposes that the most important meta-ethical question is not “What is the meaning of normative words, sentences and what is the ontological fabric of the moral world?” but “What should morality and ethics be for?”. It is a form of meta-ethics that focuses on finding theoretical resources that can be helpful in understanding ongoing ethical debates between disciples (...) of Aristotle, Epicurus, the Stoics, Augustine, Hobbes, utilitarians and Kant, and in building normative ethical theories that can help us to answer normative questions. As an example of such output I will present a formal sketch of Hybrid Function Consequentialism – a normative ethical theory based upon the meta-ethical framework proposed here. (shrink)

In the last couple of years, increased attention has been directed at the question of whether there is such a thing as a distinctively political normativity. With few exceptions, this question has so far only been explored by political realists. However, the discussion about a distinctively political normativity raises methodological and meta-theoretical questions of general importance for political theory. Although the terminology varies, it is a widely distributed phenomenon within political theory to rely on a normative source which is said (...) to be political rather than moral, or at least foremost political. In light of this concern, the present paper moves beyond political realism in the attempt to explore alternative ways of understanding distinctively political normativity, in a way which may be useful for political theorists. More specifically, we investigate two candidate views, here labelled the “domain view” and the “role view,” respectively. The former traces distinctness to the “domain,” that is, to the circumstances of politics. This view has gained a lot of support in the literature in recent years. The latter traces distinctness to “role,” that is, the role-specific demands that normative-political principles make. Our twofold claim in this paper is that the domain view is problematic but that the role view is promising. (shrink)