I defend the following version of the ought-implies-can principle: (OIC) by virtue of conceptual necessity, an agent at a given time has an (objective, pro tanto) obligation to do only what the agent at that time has the ability and opportunity to do. In short, obligations correspond to ability plus opportunity. My argument has three premises: (1) obligations correspond to reasons for action; (2) reasons for action correspond to potential actions; (3) potential actions correspond to ability plus opportunity. In the (...) bulk of the paper I address six objections to OIC: three objections based on putative counterexamples, and three objections based on arguments to the effect that OIC conflicts with the is/ought thesis, the possibility of hard determinism, and the denial of the Principle of Alternate Possibilities. (shrink)

Many philosophers claim that it cannot be the case that a person ought to perform an action if this person cannot perform this action. However, most of these philosophers do not give arguments for the truth of this claim. In this paper, I argue that it is plausible to interpret this claim in such a way that it is entailed by the claim that there cannot be a reason for a person to perform an action if it is impossible that (...) this person will perform this action. I then give three arguments for the truth of the latter claim, which are also arguments for the truth of the former claim as I interpret it. (shrink)

Walter Sinnott-Armstrong argues that 'ought' does not entail 'can', but instead conversationally implicates it. I argue that Sinnott-Armstrong is actually committed to a hybrid view about the relation between 'ought' and 'can'. I then give a tensed formulation of the view that 'ought' entails 'can' that deals with Sinnott-Armstrong's argument and that is more unified than Sinnott-Armstrong's view.

The aim of this article is twofold. First, it is argued that while the principle of ‘ought implies can’ is certainly plausible in some form, it is tempting to misconstrue it, and that this has happened in the way it has been taken up in some of the current literature. Second, Kant's understanding of the principle is considered. Here it is argued that these problematic conceptions put the principle to work in a way that Kant does not, so that there (...) is an important divergence here which can easily be overlooked. (shrink)

The principle, Ought implies can, Has two versions. The strong version expresses a necessary condition for the appropriateness of moral judgments; the weak version expresses a possible ground for excusing wrongdoing. The strong version is presupposed by choice-Morality, While the weak one is presupposed by character-Morality. It is argues that the strong version and choice-Morality are mistaken and that the weak version and character-Morality give a much more plausible account of our moral experience. The general conclusion is that choice is (...) not necessary for the appropriateness of moral disapproval. (shrink)

In this classic text, Kant sets out to articulate and defend the Categorical Imperative - the fundamental principle that underlies moral reasoning - and to lay the foundation for a comprehensive account of justice and human virtues. This new edition and translation of Kant's work is designed especially for students. An extensive and comprehensive introduction explains the central concepts of Groundwork and looks at Kant's main lines of argument. Detailed notes aim to clarify Kant's thoughts and to correct some common (...) misunderstandings of his doctrines. (shrink)

I argue for a version of "ought" implies "can". In particular, I argue that it is necessarily true that if an agent, S, ultima facie ought to do A at T', then there is a time T* such that S can at T* do A at T'. In support of this principle, I have argued that without it, we cannot explain how it is that, in cases where agents cannot do the best thing, they often ought to do some alternative (...) action - such as get help or do the promised action later; nor can we explain the phenomenon of necessary enablers or the phenomenon of more stringent prima facie obligations overriding less stringent ones in cases where the agent cannot fulfill both. (shrink)

The book asks how, and how much, we can improve our ethical standards—not lift our behaviour closer to our standards but refine the standards themselves. To answer this question requires answering most of the major questions of ethics. So the book includes a discussion of what a good life is like, where the bounds of the natural world come, how values relate to that world (e.g. naturalism, realism), how great human capacities—the ones important to ethics—are, and where moral norms come (...) from. Throughout the book, the question of what philosophy can contribute to ethics arises. Philosophical traditions, such as most forms of utilitarianism, deontology, and virtue ethics, are, the book contends, too ambitious. Ethics cannot be what philosophers in those traditions expect it to be because agents cannot be what these philosophies require them to be. The book starts by questioning the adequacy of both appeals to intuition and the coherence method of justification in ethics (e.g. wide reflective equilibrium) and ends with a description of the sort of justification available to us. (shrink)

N.B. Dr Bykvist is now based at the Faculty of Philosophy, University of Oxford. The full-text of this article is not currently available in ORA, but you may be able to access the article via the publisher copy link on this record page.