Moral particularism, on some interpretations, is committed to a shapeless thesis: the moral is shapeless with respect to the natural. (Call this version of moral particularism ‘shapeless moral particularism’). In more detail, the shapeless thesis is that the actions a moral concept or predicate can be correctly applied to have no natural commonality (or shape) amongst them. Jackson et al. (Ethical particularism and patterns, Oxford University Press, Oxford, 2000) argue, however, that the shapeless thesis violates the platitude ‘predication supervenes on (...) nature’—predicates or concepts apply because of how things are, and therefore ought to be rejected. I defend shapeless moral particularism by arguing that Jackson et al’s contention is less compelling than it firstly appears. My defense is limited in the sense that it does not prove shapeless moral particularism to be right and it leaves open the possibility that shapeless moral particularism might attract criticisms different from the ones advanced by Jackson et al. But at the very least, I hope to say enough to undermine Jackson et al’s powerful attack against it. The plan of this paper is as follows. Section 1 glosses the view of moral particularism and why it is taken to be essentially committed to the shapeless thesis. Section 2 examines a Wittgensteinian argument for the shapeless thesis. I shall argue that the Canberrans’ counter-arguments against it on grounds of disjunctive commonality and conceptual competence do not succeed. Section 3 explicates Canberrans’ predication supervenience argument against the shapeless thesis. Section 4 offers my criticisms of the Canberrans’ predication supervenience argument. In view of the above discussions, in Sect. 5, I conclude that there is no compelling argument (from the Canberrans) to believe that the shapeless thesis fails (as I have argued in Sect. 4). In fact, there is some good reason for us to believe it (as I have argued in Sect. 2). If so, I contend that moral particularism, when construed as essentially committed to the shapeless thesis, still remains as a live option. (shrink)

It is widely acknowledged that moral principles are not sufficient to guide moral thought and action: they need to be supplemented by a capacity for judgement. However, why can we not rely on this capacity for moral judgement alone? Why do moral principles need to be supplemented, but are not supplanted, by judgement? So-called moral particularists argue that we can, and should, make moral decisions on a case-by-case basis without any principles. According to particularists, the person of moral judgement is (...) a person of empathy, sensibility and virtue, rather than a person of principle. In this paper I argue that this is a false dichotomy. The person of good moral judgement is a person of principle. I propose that we think of moral principles as internalised long-term commitments that form our moral character and sensitivity, and, as such, are constitutive of moral judgement. (shrink)

This 183-page introductory part of my dissertation is an overview of some key debates in philosophical moral psychology and its methodology.

The claim that the normative depends on the non-normative is just as entrenched in metanormative theory as the claim that the normative supervenes on the non-normative. It is widely held to be a genuine truism, a conceptual truth that operates as a constraint on competence with normative concepts. Call it the dependence constraint. I argue that this status is unwarranted. While it is true that the normative is dependent, it is not a genuine truism, or a conceptual truth, that it (...) depends on the nonnormative. I argue for the following inadequacy claim: that when we cull all the normative terms from our language, and so the concepts that they stand for, what we will be left with will not necessarily be sufficient to adequately describe, conceptualize or represent what it is that we are supposed to be making normative judgements in virtue of. This has implications for both ascriptive and metaphysical understandings of the dependence constraint, and the potential to radically reshape the dialectic in metanormative theory. (shrink)

Critics argue that non-cognitivism cannot adequately account for the existence and nature of some thick moral concepts. They use the existence of thick concepts as a lever in an argument against non-cognitivism, here called the Thick Concept Argument (TCA). While TCA is frequently invoked, it is unfortunately rarely articulated. In this paper, TCA is first reconstructed on the basis of John McDowell’s formulation of the argument (from 1981), and then evaluated in the light of several possible non-cognitivist responses. In general, (...) TCA assumes too much about what a non-cognitivist is (or must be) committed to. There are several non-cognitivist theories, and only some fit the view attacked by TCA. Furthermore, TCA rests on a contestable intuition about a thought experiment, here called the External Standpoint Experiment (ESE). It is concluded that TCA is remarkably weak, given how frequently the argument is invoked. (shrink)

In their article entitled “Ethical Particularism and Patterns”, Frank Jackson, Philip Pettit, and Michael Smith (JPS henceforth) argue that moral particularism is a cognitively implausible theory since it appears to entail the view that one might have a skill that is not grounded in an ability to recognise and represent natural patterns in the world. This charge echoes the complaints of computational theorists of cognition against their embodied cognition counterparts, namely that, theories of cognition that eschew talk of mental representation (...) are implausible qua theories of cognition. In both debates, the cognitive role of generalisation is central to the discussion; however, contrary to the received wisdom, I want to suggest that the dispute is not between generalisation or mental representation on the one hand and no generalisation or mental representation on the other, but rather between what I will call global and local generalisation. Using the dialogue between JPS and Dancy (our paradigm particularist) to frame this discussion, I show that by replacing Dancy's connectionist model for particularist reasoning with a case-based one, we not only vindicate his response to JPS, but we also gain insight into how it is the global/local distinction rather than the generalisation/no generalisation distinction that divides the two views. (shrink)

Machine ethics is the field that strives to develop ‘artificial moral agents’ (AMAs), artificial systems that can autonomously make moral decisions. Some authors have questioned the feasibility of machine ethics, by questioning whether artificial systems can possess moral competence, or the capacity to reach morally right decisions in various situations. This paper explores this question by drawing on the work of several moral philosophers (McDowell, Wiggins, Hampshire, and Nussbaum) who have characterised moral competence in a manner inspired by Aristotle. Although (...) disparate in many ways, these philosophers all emphasise what may be called ‘moral sensitivity’ as a precondition for moral competence. Moral sensitivity is the uncodified, practical skill to recognise, in a range of situations, which features of the situations are morally relevant, and how they are relevant. This paper argues that the main types of AMAs currently proposed are incapable of full moral sensitivity. First, top-down AMAs that proceed from fixed rule-sets are too rigid to respond appropriately to the wide range of qualitatively unique factors that moral sensitivity gives access to. Second, bottom-up AMAs that learn moral behaviour from examples are at risk of generalising from these examples in undesirable ways, as they lack embedding in what Wittgenstein calls a ‘form of life’, which allows humans to appropriately learn from moral examples. The paper concludes that AMAs are unlikely to possess full moral competence, but closes by suggesting that they may still be feasible in restricted domains of public morality, where moral sensitivity plays a smaller role. (shrink)

Frank Jackson, Michael Smith, and Philip Pettit contend in their 2000 paper that an argument from supervenience deals a fatal blow to shapeless moral particularism, the view that the moral is shapeless with respect to the natural. A decade has passed since the Canberrans advanced their highly influential supervenience argument. Yet, there has not been any compelling counter-argument against it, as far as I can see. My aim in this paper is to fill in this void and defend SMP against (...) the Canberrans’ supervenience argument. Such being the case, I will firstly re-construct the Canberrans’ supervenience argument in detail and push it as far as it can go. In fact, I will defend it against a number of existing objections respectively from Garfield, Dancy, and McDowell. Next, I will argue, however, that the supervenience argument, despite its initial plausibility, has one major pitfall: it hinges on an overly permissive conception of ‘shape’ such that it does not generate the right kind of moral principles the shapeless moral particularists are concerned to refute. I thus conclude that the seemingly scathing supervenience argument turns out to be toothless against SMP. Although this would not prove SMP to be right, for it might attract criticisms from other fronts, yet, until they come up, SMP, contrary to prevalent conceptions, remains alive and kicking. (shrink)

Jonathan Dancy challenges moral generalists to come up with a picture of moral thought and judgment which requires a provision of principles that cover the ground. The aim of this paper is to provide a response to Dancy's challenge. I argue that reasonable moral thought requires us to explain ourselves when we have reason to doubt our moral judgment about some particular case, that any such explanation commits us to a general moral principle over some domain of discussion and that (...) this principle expands to cover more and more ground as we consider more and more cases. (shrink)

Within cognitive science, mental processing is often construed as computation over mental representations—i.e., as the manipulation and transformation of mental representations in accordance with rules of the kind expressible in the form of a computer program. This foundational approach has encountered a long-standing, persistently recalcitrant, problem often called the frame problem; it is sometimes called the relevance problem. In this paper we describe the frame problem and certain of its apparent morals concerning human cognition, and we argue that these morals (...) have significant import regarding both the nature of moral normativity and the human capacity for mastering moral normativity. The morals of the frame problem bode well, we argue, for the claim that moral normativity is not fully systematizable by exceptionless general principles, and for the correlative claim that such systematizability is not required in order for humans to master moral normativity. (shrink)

‘Particularism’ and ‘generalism’ refer to families of positions in the philosophy of moral reasoning, with the former playing down the importance of principles, rules or standards, and the latter stressing their importance. Part of the debate has taken an empirical turn, and this turn has implications for AI research and the philosophy of cognitive modeling. In this paper, Jonathan Dancy’s approach to particularism (arguably one of the best known and most radical approaches) is questioned both on logical and empirical grounds. (...) Doubts are raised over whether Dancy’s brand of particularism can adequately explain the graded nature of similarity assessments in analogical arguments. Also, simple recurrent neural network models of moral case classification are presented and discussed. This is done to raise concerns about Dancy’s suggestion that neural networks can help us to understand how we could classify situations in a way that is compatible with his particularism. Throughout, the idea of a surveyable standard—one with restricted length and complexity—plays a key role. Analogical arguments are taken to involve multidimensional similarity assessments, and surveyable contributory standards are taken to be attempts to articulate the dimensions of similarity that may exist between cases. This work will be of relevance both to those who have interests in computationally modeling human moral cognition and to those who are interested in how such models may or may not improve our philosophical understanding of such cognition. (shrink)

A simple recurrent artificial neural network is used to classify situations as permissible or impermissible. The trained ANN can be understood as having set up a similarity space of cases at the level of its internal or hidden units. An analysis of the network’s internal representations is undertaken using a new visualization technique for state space approaches to understanding similarity. Insights from the literature on moral philosophy pertaining to contributory standards will be used to interpret the state space set up (...) by the ANN as being structured by implicit reasons. The ANN, on its own, is not capable of explicitly representing or offering reasons to itself or others. That said, the low level similarity space set up by the network could be made available to higher order processes that exploit it for case-based reasoning. It is argued that for normative purposes, similarity could be seen as a contributor to procedural coherence in case-based reasoning and local forms of substantive coherence, but not to global forms of coherence given the computational complexity of managing those more ambitious forms of coherence. (shrink)