We generalize standard Turing machines, which work in time ω on a tape of length ω, to α-machines with time α and tape length α, for α some limit ordinal. We show that this provides a simple machine model adequate for classical admissible recursion theory as developed by G. Sacks and his school. For α an admissible ordinal, the basic notions of α-recursive or α-recursively enumerable are equivalent to being computable or computably enumerable by an α-machine, respectively. We emphasize the (...) algorithmic approach to admissible recursion theory by indicating how the proof of the Sacks–Simpson theorem, i.e., the solution of Post’s problem in α-recursion theory, could be based on α-machines, without involving constructibility theory. (shrink)

Kiesewetter defends the normativity of rationality by presenting a new solution to the problems that arise from the common assumption that we ought to be rational. He provides a defence of a reason-response conception of rationality, an evidence-relative account of reason, and an explanation of structural irrationality in relation to these accounts.

We use a theorem from M. J. Schervish to explore the relationship between accuracy and practical success. If an agent is pragmatically rational, she will quantify the expected loss of her credence with a strictly proper scoring rule. Which scoring rule is right for her will depend on the sorts of decisions she expects to face. We relate this pragmatic conception of inaccuracy to the purely epistemic one popular among epistemic utility theorists.

Views from one of the most original cultural critics of the twentieth century, Walter Benjamin.

Accounts of heavenly freedom typically attempt to reconcile the claim that the redeemed have free will with the claim that the redeemed cannot sin. In this paper, I first argue that Pawl and Timpe :396–417, 2009) tracing account of heavenly freedom—according to which the redeemed in heaven have only ‘derivative’ free will—is untenable. I then sketch an alternative account of heavenly freedom, one which eschews derivative free will. On this account, the redeemed are able to sin in heaven.

Epicurean ethics has been subject to withering ancient and contemporary criticism for the supposed irreconcilability of Epicurus’s emphatic endorsement of friendship and his equally clear and striking ethical egoism. Recently, Matthew Evans (2004) has suggested that the key to a plausible Epicurean response to these criticisms must begin by understanding why friendship is valuable for Epicurus. In the first section of this paper I develop Evans’ suggestion further. I argue that a shared conception of the human telos and of what (...) is required to attain it structures the confidence that characterizes friendship. In the second part of the paper I return to two contemporary criticisms of Epicurean friendship. The first criticism focuses on the problem of free riders. The second criticism points to a seeming inconsistency in Epicurean doctrine. I suggest that both criticisms can be adequately addressed once we understand Epicurean friendship in greater depth. (shrink)

Thomas Kroedel argues that the lottery paradox can be solved by identifying epistemic justification with epistemic permissibility rather than epistemic obligation. According to his permissibility solution, we are permitted to believe of each lottery ticket that it will lose, but since permissions do not agglomerate, it does not follow that we are permitted to have all of these beliefs together, and therefore it also does not follow that we are permitted to believe that all tickets will lose. I present two (...) objections to this solution. First, even if justification itself amounts to no more than epistemic permissibility, the lottery paradox recurs at the level of doxastic obligations unless one adopts an extremely permissive view about suspension of belief that is in tension with our practice of doxastic criticism. Second, even if there are no obligations to believe lottery propositions, the permissibility solution fails because epistemic permissions typically agglomerate, and the lottery case provides no exception to this rule. (shrink)

It has been suggested that puzzles in the interpretation of quantum mechanics motivate consideration of entities that are numerically distinct but do not stand in a relation of identity with themselves or non-identity with others. Quite apart from metaphysical concerns, I argue that talk about such entities is either meaningless or not about such entities. It is meaningless insofar as we attempt to take the foregoing characterization literally. It is meaningful, however, if talk about entities without identity is taken as (...) elliptical for either nominal or predicative use of a special class of mass terms. (shrink)

Objectives To determine the role played by law in medical specialists9 decision-making about withholding and withdrawing life-sustaining treatment from adults who lack capacity, and the extent to which legal knowledge affects whether law is followed. Design Cross-sectional postal survey of medical specialists. Setting The two largest Australian states by population. Participants 649 medical specialists from seven specialties most likely to be involved in end-of-life decision-making in the acute setting. Main outcome measures Compliance with law and the impact of legal knowledge (...) on compliance. Results 649 medical specialists (of 2104 potential participants) completed the survey (response rate 31%). Responses to a hypothetical scenario found a potential low rate of legal compliance, 32% (95% CI 28% to 36%). Knowledge of the law and legal compliance were associated: within compliers, 86% (95% CI 83% to 91%) had specific knowledge of the relevant aspect of the law, compared with 60% (95% CI 55% to 65%) within non-compliers. However, the reasons medical specialists gave for making decisions did not vary according to legal knowledge. Conclusions Medical specialists prioritise patient-related clinical factors over law when confronted with a scenario where legal compliance is inconsistent with what they believe is clinically indicated. Although legally knowledgeable specialists were more likely to comply with the law, compliance in the scenario was not motivated by an intention to follow law. Ethical considerations (which are different from, but often align with, law) are suggested as a more important influence in clinical decision-making. More education and training of doctors is needed to demonstrate the role, relevance and utility of law in end-of-life care. (shrink)

This book presents a contextual study of the life and work of the Cambridge Platonist Ralph Cudworth (1617-1688). Focusing on the theological basis of Cudworth's ethical philosophy, this book unlocks the hitherto ignored political aspect to Cudworth's ethical philosophy. Through a detailed examination of Cudworth's published works - particularly his voluminous "True intellectual system of the Universe" -, his posthumously published writings, and his 'freewill' manuscripts Benjamin Carter argues that the ethical and political arguments in Cudworth's philosophy develop out (...) of Cudworth's Trinitarian theology. Carter traces the link between Cudworth's trinitarianism and his ethical and political ideas by placing Cudworth's work in the turbulent religious and intellectual context of seventeenth-century England, and the University of Cambridge in particular. (shrink)

In believing or acting on authority, an agent appears to believe or act without making up her own mind about what is the case or what to do. How is this possible? How can an agent make up her mind about a theoretical or practical question, and so believe or act intentionally, without doing so for herself? This paper argues that the standard account available in the literature of how it is that an agent can make up her mind without (...) doing so for herself, an account framed in terms of Joseph Raz’s notion of preemptive reasons, fails to adequately distinguish our rational dependence on other agents from reliance on ordinary instruments. It then offers an alternative account of what it is to make up one’s mind without doing so for oneself, one that focuses on the way in which the kind of rational responsibility that accrues to instances of settling a theoretical or practical question can be interpersonally distributed between agents and authorities. (shrink)

Sheds new light on Heidegger's early theological development.

Regulation must target the financial sector, which often funds and profits from environmentally unsustainable development. In an era of global financial markets, the financial sector has a crucial impact on the state of the environment. The long-standing movement for ethically and socially responsible investment (SRI) has recently begun to advocate environmental standards for financiers. While this movement is gaining more adherents, it has increasingly justified responsible financing as a path to be prosperous, rather than virtuous. This trend partly owes to (...) how financial institutions view their legal responsibilities. The business case motivations that now predominantly drive SRI are not sufficient to make the financial sector a means to sustainable development. Some modest legal reforms to improve the quality and extent of SRI have yet to make a tangible difference. A more ambitious strategy to promote SRI for environmental sustainability is possible, based on reforming the fiduciary duties of financial institutions. Such duties, tied to concrete performance standards, could make financiers invest in more ethically responsible ways. Other collateral reforms to financial markets, including improved corporate environmental reporting, are required to promote sustainability. (shrink)

Funds and positions in philosophy should be awarded through systems that are reliable, objective, and efficient. One question usually taken to be relevant is how many publications people have in a group of well-respected journals. In the context of significant competition for jobs and funding, however, relying on quantity of publications creates a serious downside: the oft-lamented demand that we publish or perish. This article offers a systematic review of the problems involved in contemporary academic philosophy, and argues that the (...) resulting situation is bad not just for individual philosophers but also for philosophy itself: we are not working as a discipline to as high a standard as we might. The article then suggests some potential solutions, including some more detailed considerations around what seems a particularly promising option: a professional code of conduct for philosophers. (shrink)

In many fields of biology, both the phenomena to be explained and the mechanisms proposed to explain them are commonly presented in diagrams. Our interest is in how scientists construct such diagrams. Researchers begin with evidence, typically developed experimentally and presented in data graphs. To arrive at a robust diagram of the phenomenon or the mechanism, they must integrate a variety of data to construct a single, coherent representation. This process often begins as the researchers create a first sketch, and (...) it continues over an extended period as they revise the sketch until they arrive at a diagram they find acceptable. We illustrate this process by examining the sketches developed in the course of two research projects directed at understanding the generation of circadian rhythms in cyanobacteria. One identified a new aspect of the phenomenon itself, whereas the other aimed to develop a new mechanistic account. In both cases, the research resulted in a paper in which the conclusion was presented in a diagram that the authors deemed adequate to convey it. These diagrams violate some of the normative “cognitive design principles” advanced by cognitive scientists as constraints on successful visual communication. We suggest that scientists’ sketching is instead governed by norms of success that are broadly explanatory: conveying the phenomenon or mechanism. (shrink)

It is widely accepted in science that the universe is a closed deterministic system in which everything can, ultimately, be explained by purely physical...

Despite their diversity, human languages share consistent properties and regularities. Wherefrom does this consistency arise? And does it tell us something about the problem that all languages need to solve? The authors provide an intriguing analyses which focuses on the “communicative function of ambiguity” whose resolution entailed an equally intriguing “speaker–listener cross‐entropy objective for measuring the efficiency of linguistic systems from first principles of efficient language use.”.

Pandemic plans recommend phases of response to an emergent infectious disease outbreak, and are primarily aimed at preventing and mitigating human-to-human transmission. These plans carry presumptive weight and are increasingly being operationalized at the national, regional and international level with the support of the World Health Organization. The conventional focus of pandemic preparedness for EIDs of zoonotic origin has been on public health and human welfare. However, this focus on human populations has resulted in strategically important disciplinary silos. As the (...) risks of zoonotic diseases have implications that reach across many domains outside traditional public health, including anthropological, environmental, and veterinary fora, a more inclusive ecological perspective is paramount for an effective response to future outbreaks. (shrink)

The use of statistics in medical research has been compared to a religion: it has its high priests, supplicants, and orthodoxy. Although the comparison may be more unfair to religion than to research, a useful lesson can nonetheless be drawn: the practice of clinical research may benefit—as does the spirit—from critical self-examination. Arguably, no aspect of the conduct of clinical trials is currently more controversial—and thus in as dire need of critical examination—than the use of placebo controls. The ethical and (...) scientific controversies associated with placebo-controlled trials, never far below the surface, have once again seized public attention. Clearly, concern about these issues within the professional community runs deep and wide, as evidenced by the volume of response generated by Kenneth Rothman and Karin Michels's recent Critique. Criticisms of the use of placebo controls in clinical research are scattered through the literatureo; our objective is to present the case against placebos in a compendious form that takes account of scientific and statistical as well as normative issues. (shrink)

Rüdiger Bittner argues that regret is not useful and so it is always unreasonable to feel and express it. In this paper, I argue that regret is often reasonable because regret has a communicative function: it communicates where we stand with respect to things we have done and outcomes that we have caused. So, I not only argue that Bittner’s argument is unsuccessful, I also shed light on the nature and purpose of regret.

The goal of this paper is to explain and defend the following argument: (1) If it can be reasonably doubted that someone had free will with respect to some action, then it is a requirement of justice to refrain from doing serious retributive harm to him in response to that action. (2) Anyone who believes the free will debate to be philosophically valuable must accept that it can be reasonably doubted that anyone ever has free will. (3) Therefore, anyone who (...) believes the free will debate to be philosophically valuable must accept that it is a requirement of justice to refrain from serious retributive harm. (shrink)

This is a summary of the main ideas of my book 'The Normativity of Rationality'.

With the godlike powers of modern technology, just one bad actor can unleash hell on Earth. In the face of this threat posed by technology, some have proposed moral bioenhancement as a solution. Although moral bioenhancement may at first seem like something Christian should support, it is my contention in this paper that there is at least one significant reason for Christians to be cautious in their appropriation of moral bioenhancement technology: it can at best give us a false apatheia, (...) which runs the ironic risk of destroying our ability to make moral progress. (shrink)

Valuably, the book also emphasises Levinas's importance for contemporary ethical problems and thinking.

According to some accounts of exploitation, most notably Ruth Sample’s degradation-based account and Robert Goodin’s vulnerability-based account, exploitation occurs when an advantaged party fails to constrain their advantage in light of another’s disadvantage, regardless of the cause of this disadvantage. Because the duty of constraint in these accounts does not depend on the cause of the disadvantage, the advantaged’s duty of constraint is what I call a ‘come-what-may’ duty. I show that come-what-may duties create moral hazards that can themselves be (...) exploited by the disadvantaged parties. In such cases these accounts of exploitation are either self-frustrating or over-demanding. (shrink)

If the Bounded Proper Forcing Axiom BPFA holds, then Mouse Reflection holds at N₂ with respect to all mouse operators up to the level of Woodin cardinals in the next ZFC-model. This yields that if Woodin's ℙ max axiom (*) holds, then BPFA implies that V is closed under the "Woodin-in-the-next-ZFC-model" operator. We also discuss stronger Mouse Reflection principles which we show to follow from strengthenings of BPFA, and we discuss the theory BPFA plus "NS ω1 is precipitous" and strengthenings (...) thereof. Along the way, we answer a question of Baumgartner and Taylor. [2, Question 6.11]. (shrink)

Towards the unconditioned: Kant, Epicurus and Glückseligkeit -- Arendt and the time of the pardon -- Kant, evil, and the unconditioned -- Judgment after Derrida.

Most attempts to answer the question of whether populations of groups can undergo natural selection focus on properties of the groups themselves rather than the dynamics of the population of groups. Those approaches to group selection that do emphasize dynamics lack an account of the relevant notion of equivalent dynamics. I show that the theory of ‘dynamical kinds’ I proposed in Jantzen :3617–3646, 2014) can be used as a framework for assessing dynamical equivalence. That theory is based upon the notion (...) of a dynamical symmetry, a transformation of a system that commutes with its evolution through time. In the proposed framework, structured sets of dynamical symmetries are used to pick out equivalence classes of systems. These classes are large enough to encompass the range of phenomena we associate with natural selection, yet restrictive enough to guarantee a sort of causal homogeneity. By characterizing dynamical kinds via symmetry structures in this way, the question of levels of selection becomes a precise question about which populations respect the dynamical symmetries of Darwinian evolution. Standard population genetic models suggest that populations undergoing evolution by natural selection are partially characterized by a group of fitness-scaling symmetries. I demonstrate conditions under which these symmetries may be satisfied by populations of individuals, populations of groups of individuals, or both simultaneously. (shrink)

Duty and Healing positions ethical issues commonly encountered in clinical situations within Jewish law. The concept of duty is significant in exploring bioethical issues, and this book presents an authentic and non-parochial Jewish approach to bioethics, while it includes critiques of both current secular and Jewish literatures. Among the issues the book explores are the role of family in medical decision-making, the question of informed consent as a personal religious duty, and the responsibilities of caretakers. The exploration of contemporary ethical (...) problems in healthcare through the lens of traditional sources in Jewish law is an indispensable guide of moral knowledge. (shrink)

It is widely accepted in science that the universe is a closed deterministic system in which everything can, ultimately, be explained by purely physical causation. And yet we all experience ourselves as having the freedom to choose between alternatives presented to us — ‘we’ are in the driving seat. The puzzling status of volition is explored in this issue by a distinguished body of scientists and philosophers.

Recent Darwin scholarship has provided grounds for recognising the Origin as a literary as well as a scientific achievement. While Darwin was an acute observer, a gifted experimentalist and indefatigable theorist, this essay argues that it was also crucial to his impact that the Origin transcended the putative divide between the scientific and the literary. Analysis of Darwin’s development as a writer between his journal-keeping on HMS Beagle and his construction of the Origin argues the latter draws on the pattern (...) of the Romantic or Kantian sublime. The Origin repeatedly uses strategies which challenge the natural-theological appeal to the imagination in conceiving nature. Darwin’s sublime coaches the Origin’s readers into a position from which to envision nature that reduces and contains its otherwise overwhelming complexity. As such, it was Darwin’s literary achievement that enabled him to fashion a new ‘habit of looking at things in a given way’ that is the centrepiece of the scientific revolution bearing his name. (shrink)

Terence Cuneo has recently argued that we have to be committed to the existence of epistemic facts insofar as they are indispensable to theorizing. Furthermore, he argues that the epistemic properties of these facts are inextricably ‘ontologically entangled’ with certain moral properties, such that there exist ‘moral-epistemic’ facts. Cuneo, therefore, concludes that moral realism is true. I argue that Cuneo’s appeal to the existence of moral-epistemic facts is problematic, even granting his argument for the existence of indispensable epistemic facts. I (...) conclude, therefore, that Cuneo’s argument fails to justify moral realism. (shrink)

This a a reply to Gerhard Ernst's and Erasmus Mayr's critical comments on my book 'The Normativity of Rationality'.