This paper situates the problem of defeaters in a larger debate about the source of normative authority. It argues in favour of a constructivist account of defeasibility, which appeals to the justificatory role of normative principles. The argument builds upon the critique of two recent attempts to deal with defeasibility: first, a particularist account, which disposes of moral principles on the ground that reasons are holistic; and second, a proceduralist view, which addresses the problem of defeaters by distinguishing between provisional (...) and strictly universal principles. The particularist view fails to establish that moral principles have no epistemological import, but it raises important questions about their role in practical reasoning. The proceduralist view fails to distinguish between reasoning by default and reasoning by principles, but it shows that normative principles have a structural justificatory role. The constructivist view recognizes that the moral valence of normative claims vary across contexts, but denies that this is because of holism about reasons. Rather, it defends defeasibility within a constructivist account of reasoning where universality serves as the matrix of judgment. The constructivist view vindicates the justificatory role of universal normative principles, and makes room for some ordinary sources of defeasibility, which are left unaccounted by competing views, and which depend on the agent’s own progress. (shrink)

Constructivism in ethics is the view that insofar as there are normative truths, for example, truths about what we ought to do, they are in some sense determined by an idealized process of rational deliberation, choice, or agreement. As a “first-order moral account”--an account of which moral principles are correct-- constructivism is the view that the moral principles we ought to accept or follow are the ones that agents would agree to or endorse were they to engage in a hypothetical (...) or idealized process of rational deliberation. As a “metaethical account” – an account of whether there are any normative truths and, if so, what they are like – constructivism holds that there are normative truths. These truths are not fixed by facts that are independent of the practical standpoint, however characterized; rather, they are constituted by what agents would agree to under some specified conditions of choice. In working to provide a more precise definition of constructivism in metaethics, the focus of this entry, one faces two main difficulties. The first difficulty is that constructivism comes in several varieties, each of which claims a different niche within metaethics, and some claim no space at all. The second difficulty concerns where to place constructivism on the metaethical map in relation to realism and anti-realism. These are terms of art, and it is highly contested which views count as realist and which as antirealist. These two difficulties will be addressed in what follows by focusing on the distinctive questions that constructivist theories are designed to answer. Section §1 defines the scope of constructivism in ethics, in contrast to constructivism in political theory. Sections §§2-5 illustrate the main varieties of metaethical constructivism, which are designed to account for the nature of normative truths and practical reasons. Section §6 presents the main varieties of constructivist accounts of the justification of moral judgments of right and wrong. Section §7 discusses the metaethical status of constructivism, and its distinctive import. (shrink)

Some species are weedy: they move from one ecological niche to another. Other species are specialized: they are exquisitely adapted to exploit a particular niche. Human beings are the design solution in which a species is simultaneously weedy and specialized - the trick being to manage the exquisite niche-specific adaptations in software rather than in the hardware. We are built to reprogram ourselves on the fly, to select new goals, new priorities and new guidelines appropriate to novel niches. Understanding ourselves (...) as an implementation of this design solution has consequences for the theory of practical reasoning. Instrumentalism (the theory of practical reasoning according to which it consists solely in selecting means to pre-given ends) cannot be a suitable theory of rationality for such a species (that is, our own). (shrink)

Human excellences such as intelligence, morality, and consciousness are investigated by philosophers as well as artificial intelligence researchers. One excellence that has not been widely discussed by AI researchers is practical wisdom, the highest human excellence, or the highest, seventh, stage in Dreyfus’s model of skill acquisition. In this paper, I explain why artificial wisdom matters and how artificial wisdom is possible (in principle and in practice) by responding to two philosophical challenges to building artificial wisdom systems. The result is (...) a conceptual framework that guides future research on creating artificial wisdom. (shrink)