Browsing by Author "Sinnott-Armstrong, Walter"
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Item Open Access A Defense of Basic Prudential Hedonism(2020) Nelson, Joseph RichardPrudential hedonism is a school of thought in the philosophy of welfare that says that only pleasure is good for us in itself and only pain is bad for us in itself. This dissertation concerns an especially austere form of prudential hedonism: basic prudential hedonism (BPH). BPH claims that all pleasure is good for us in itself, and all pain is bad for us in itself, without exception; that all pleasures feel fundamentally alike, as do all pains; and that the amount of welfare in a person’s life can (in principle) be calculated just by adding up the amount of pleasure it contains and subtracting the amount of pain. The dissertation presents a positive argument for the claim that pleasures and pains are defined by common phenomenal properties, defends BPH against a battery of objections, and outlines an argument for accepting BPH on the grounds that it is simpler than competing views.
Item Open Access Animals as Moral Agents(2022) Bischof, AngelaSince Peter Singer’s (1975) Animal Liberation, sentience has been the dominant justification for increasing non-human animal (hereafter ‘animal’) welfare. This dissertation is an attempt to discover a different reason to treat animals better: their moral agency. If animals are moral agents, then they deserve additional moral rights, rights that arise independently from their sentience.
To find out whether animals are moral agents, I focus on whether animals are ever morally responsible for their actions. More specifically, I examine whether animals punish each other. I focus on a special type of punishment: third-party retributive punishment. This is punishment issued by an unaffected bystander for a moral wrongdoing.
Humans do not treat animals as moral agents, but this does not mean that animals are never morally responsible. I evaluate animal behavior from the contexts of their own communities. Rather than focus on the ways in which humans treat animals, I focus on the ways in which animals treat one another.
This dissertation is highly interdisciplinary, utilizing principles of philosophy alongside empirical evidence from psychology, evolutionary anthropology, animal behavior, and ecology. Both the theoretical and empirical evidence support my main conclusion: animals are moral agents.
Item Open Access Data-driven investigations of disgust(2019) Hanna, EleanorDisgust features prominently in many facets of human life, from dining etiquette to spider phobia to genocide. For some applications, such as public health campaigns, it might be desirable to know how to increase disgust, whereas for things like legal and political decision-making it might be desirable to know how to suppress disgust. However, interventions in neither direction can take place until the basic structure of disgust is better understood. Disgust is notoriously difficult to model, largely due to the fact that it is a highly individually variable, multifactorial construct, with a great breadth of eliciting stimuli and contexts. As such, many of the theories which attempt to comprehensively describe disgust come into conflict with each other, impeding progress towards more efficient and effective ways of predicting disgust-related outcomes. The aim of this dissertation is to explore the possible contribution of data-driven methods to resolving theoretical questions, evaluating extant theories, and the generation of novel conceptual structures from bottom-up insights. Data were collected to sample subjective experience as well as psychophysiological reactivity. Through the use of techniques such as factor analysis and support vector machine classification, several insights about the approaching the study of disgust emerged. In one study, results indicated that the level of abstraction across subdivisions of disgust is not necessarily constant, in spite of a priori theoretical expectations: in other words, some domains of disgust are more general than others, and recognizing as much will improve the predictive validity of a model. Another study highlighted the importance of recognizing one particular category of disgust elicitors (mutilation) as a separate entity from the superordinate domains into which extant theories placed it. Finally, another study investigated the influence of concurrent emotions on variability in disgust physiology, and demonstrated the difference in the representations of the structure of disgust between the level of subjective experience and the level of autonomic activity. In total, the studies conducted as part of this dissertation suggest that for constructs as complex as disgust, data-driven approaches investigations can be a boon to scientists looking to evaluate the quality of the theoretical tools at their disposal.
Item Open Access Debunking Challenges to Moral Realism(2012) Braddock, Matthew C.Heightened awareness of the evolutionary, socio-cultural, and psychological origins of our moral judgments pushes many of us in the direction of moral skepticism, in the direction of doubting the objective truth of our moral judgments. But should awareness of the origins of our moral judgments shake our confidence in them? Are there good moral debunking challenges or debunking arguments from premises concerning the accessible origins of our moral judgments to skeptical conclusions regarding them? In vigorous pursuit of these questions, this dissertation sifts three promising moral debunking challenges to moral realism, namely Richard Joyce's (2001) evolutionary debunking argument from epistemic insensitivity, Sharon Street's (2006) "Darwinian Dilemma," and David Enoch's (2010) "Epistemological Challenge." It is argued that each challenge faces cogent objections that not only demonstrate the inadequacy of the best debunking challenges available but also instructively guide us to the development of new and more forceful debunking challenges to moral realism. This dissertation develops two new and forceful debunking challenges, both of which target the epistemic reliability and justification of our moral judgments on realist views of the moral facts. The first new debunking challenge starts from the premise that the best explanation of our moral judgments does not appeal to their truth and invokes a new species of epistemic insensitivity to secure the conclusion that our moral belief-forming processes are epistemically unreliable. The second new debunking challenge reasons that the best explanation of the fact that moral realists have no good explanation of the reliability of our moral belief-forming processes is that there is no such reliability.
Item Open Access Effects of sub-chronic methylphenidate on risk-taking and sociability in zebrafish (Danio rerio).(Naunyn-Schmiedeberg's archives of pharmacology, 2020-08) Brenner, Rebecca G; Oliveri, Anthony N; Sinnott-Armstrong, Walter; Levin, Edward DAttention deficit hyperactive disorder (ADHD) is the most common psychiatric disorder in children affecting around 11% of children 4-17 years of age (CDC 2019). Children with ADHD are widely treated with stimulant medications such as methylphenidate (Ritalin®). However, there has been little research on the developmental effects of methylphenidate on risk-taking and sociability. We investigated in zebrafish the potential developmental neurobehavioral toxicity of methylphenidate on these behavioral functions. We chose zebrafish because they provide a model with extensive genetic tools for future mechanistic studies. We studied whether sub-chronic methylphenidate exposure during juvenile development causes neurobehavioral impairments in zebrafish. Methylphenidate diminished responses to environmental stimuli after both acute and sub-chronic dosing. In adult zebrafish, acute methylphenidate impaired avoidance of an approaching visual stimulus modeling a predator and decreased locomotor response to the social visual stimulus of conspecifics. Adult zebrafish dosed acutely with methylphenidate demonstrated behaviors of less retreat from threatening visual stimuli and less approach to conspecifics compared with controls. In a sub-chronic dosing paradigm during development, methylphenidate caused less robust exploration of a novel tank. In the predator avoidance paradigm, sub-chronic dosing that began at an older age (28 dpf) decreased activity levels more than sub-chronic dosing that began at earlier ages (14 dpf and 21 dpf). In the social shoaling task, sub-chronic methylphenidate attenuated reaction to the social stimulus. Acute and developmental methylphenidate exposure decreased response to environmental cues. Additional research is needed to determine critical mechanisms for these effects and to see how these results may be translatable to neurobehavioral toxicity of prescribing Ritalin® to children and adolescents.Item Open Access Empathy for Opponents: A Cognitive, Emotional, and Institutional Approach to Moral Conflict(2021) Read, Hannah CThis dissertation investigates the role of empathy in mitigating the harms that fraught moral and political conflicts can cause. While critics of empathy have argued that it is unnecessary for morality at best and morally harmful at worst, I maintain that empathy is often needed to promote positive relationships between moral and political opponents. It is especially well suited to this task by virtue of the role it can play in helping such opponents find common ground. As I show, doing so is morally important in its own right and is also a crucial first step to avoiding a host of additional moral, epistemic, and practical pitfalls, including the tendency to dismiss the testimony of outgroup members and the inability to cooperate toward shared goals. While philosophers and social scientists have paid a great deal of attention to questions regarding the moral importance of empathy for those in need, relatively little attention has been paid to the potential moral benefits of empathy for opponents. This dissertation fills this gap while addressing the pressing problem of increased polarization, hostility, and aggression between those who are sharply opposed on issues of moral and political importance.
Item Open Access OMISSIONS, CAUSATION, AND MODALITY(2019) Henne, PaulIn The Neverending Story (1984), “the nothing” was spreading throughout Fantasia. This is terrifying not just because of the nature of the west-German fantasy film but also because nothing—non-being—was represented as something that existed. Nothing can’t be—or so it seems. In this dissertation, I ask: what do ordinary statements about omissions and absences mean if they are not about things that exist? And then I ask: how can an answer to this question help us understand omissive causation? I present various normative accounts of omissive language and omissive causal models. I end by considering some reasons to doubt such models.
Item Open Access On the Stability of Moral Judgment Over Time(2020-11) Rehren, PaulStability over time is often seen as a signature feature of moral judgment. Yet to date, little focused empirical examination of this assumption exists. In this study, we compare the stability over time of moral judgments about acts in sacrificial dilemmas, moral judgments about the items on the Moral Foundations Questionnaire, and moral judgments about the items on the Morality-as-Cooperation Questionnaire. We find that on three metrics of stability over time, the different types of moral judgment all performed similarly. We also found that changes in moral judgment, when they occurred, could not be easily explained by people changing their mind in light of reasons. We discuss potential implications of our findings for moral psychology and moral philosophy.Item Open Access Public Unreason: Essays on Political Disagreement(2017) Ancell, Aaron JamesWhy is political disagreement such a persistent and pervasive feature of contemporary societies? Many political philosophers answer by pointing to moral pluralism and the complexity of relevant non-moral facts. In Chapter 1, I argue that this answer is seriously inadequate. Drawing on work from psychology, political science, and evolutionary anthropology, I argue that an adequate explanation of political disagreement must emphasize two features of human psychology: tribalism and motivated reasoning.
It is often assumed that disagreements rooted in bias and irrationality can be ignored or idealized away by philosophers developing ideal theories, that is, theories that aim to sketch the normative outlines of an ideal society. In Chapters 2 and 3, I argue that this assumption is mistaken because even ideal theories are subject to constraints, and idealizing away disagreements rooted in certain kinds of bias and irrationality violates these constraints.
In Chapter 4, I turn to the ethics of political compromise, focusing specifically on compromises that involve making serious concessions to injustice. I consider and attempt to reconcile two seemingly inconsistent approaches to evaluating such compromises: one that emphasizes fundamental moral principles versus one that emphasizes pragmatic considerations.
Item Open Access The Benevolent Ideal Observer Theory(2018) Campbell, MichaelThis dissertation provides an answer to what I call the central question of moral philosophy: what, if anything, is moral value? The answer, I argue, is that moral value is the relational property of eliciting a suitable response from a properly informed, rational, benevolent and otherwise minimal spectator. I call this theory the response-dependent benevolent ideal observer theory or BIORD.
Although the way in which I express and argue for BIORD is original and unique, the core of the theory is old. In chapter 1, I explore these historical roots. The notion that moral value depends, in some sense, upon the reactions of an idealised spectator stretches back at least to Adam Smith and, I argue, to his tutor Francis Hutcheson. I explore how a natural connection between ideal observers, benevolence and utilitarianism has often been assumed without being explicitly argued for.
In chapter 2, I lay out certain crucial meta-theoretical assumptions that help to motivate BIORD. I argue against the methodology of conceptual analysis and in favour of a revisionary approach sometimes called ‘conceptual ethics’. I explore the theoretical aims that ought to guide the conceptual ethicists’ project before arguing in favour of a response-dependent metaethics, in contrast to other sentimentalist theories such as fitting-attitude accounts. The response-dependent schema states that an object is morally valuable if and only if a particular agent would have a particular reaction to it (in certain circumstances).
In chapter 3, I argue that the agent that ought to fill the response-dependent schema is a properly informed, rational, benevolent and otherwise minimal spectator. I define benevolence as a final care directed towards the welfare of conscious creatures and thus argue in favour of welfarism: the view that welfare is the only essential moral value.
In chapter 4, I discuss which of the benevolent observer’s reactions are best thought of as relevant, and which objects are best thought of as the bearers of both essential and non-essential moral value. I suggest that any attitude which lacks the property of being ‘truth-oriented’ is relevant. Arguments concerning the objects of value leads to a discussion of Parfit’s Repugnant Conclusion, which BIORD entails. I argue that we ought to embrace it. Lastly, I discuss the objects of non-essential value, showing how BIORD can capture some intuitions that value pluralists might otherwise use against it.
Finally, in chapter 5, I discuss how accepting BIORD would impact our moral discourse, arguing in favour of a radical eliminativist proposal in which deontic language is abandoned in favour of comparative value-talk. I then discuss how BIORD can provide us with a theory of reasons.
Item Open Access The Right of Exit: Emigration, Secession and the Structure of International Taxation(2021) Sam, Erick JerardThis Dissertation critiques the prevailing law and dominant scholarly treatment of the right to emigrate, which I understand to mean the conjunction of the rights (i) to physically leave one’s nation of membership and (ii) to renounce one’s citizenship therein. Contrary to this status quo, which holds that this legal right is and ought to be near-unconditional, it defends the revisionary view that legitimate nations, which are in good standing with the international community and respect human rights, should be permitted to recover great losses unjustly sustained as a result of unrestricted emigration by taxing their emigrants on their worldwide income on an ongoing basis where necessary, or iff such attempts at taxation prove infeasible, inadequate, or otherwise inappropriate, by employing as a backup measure the least severe restrictions on emigration required to forestall such injustices. In general, tax and economically motivated emigrants, as well as more well-off emigrants, should be taxed and regulated prior to doing so for emigrants who relocate for other reasons, such as for political or cultural reasons. In practice, however, one would expect that nations would seldom have to rely upon actual physical restrictions. This is because a home nation’s mere threat to restrict the relocation of its desirable emigrants would often provide potential destination nations with an incentive to cooperate with the home nation in the administration of a tax on its emigrants—which, under the regime I defend, the home nation would be required to avail itself of before resorting to physical restrictions.
Item Open Access Which factors should be included in triage? An online survey of the attitudes of the UK general public to pandemic triage dilemmas.(BMJ open, 2020-12-08) Wilkinson, Dominic; Zohny, Hazem; Kappes, Andreas; Sinnott-Armstrong, Walter; Savulescu, JulianObjective
As cases of COVID-19 infections surge, concerns have renewed about intensive care units (ICUs) being overwhelmed and the need for specific triage protocols over winter. This study aimed to help inform triage guidance by exploring the views of lay people about factors to include in triage decisions.Design, setting and participants
Online survey between 29th of May and 22nd of June 2020 based on hypothetical triage dilemmas. Participants recruited from existing market research panels, representative of the UK general population. Scenarios were presented in which a single ventilator is available, and two patients require ICU admission and ventilation. Patients differed in one of: chance of survival, life expectancy, age, expected length of treatment, disability and degree of frailty. Respondents were given the option of choosing one patient to treat or tossing a coin to decide.Results
Seven hundred and sixty-three participated. A majority of respondents prioritised patients who would have a higher chance of survival (72%-93%), longer life expectancy (78%-83%), required shorter duration of treatment (88%-94%), were younger (71%-79%) or had a lesser degree of frailty (60%-69%, all p<0.001). Where there was a small difference between two patients, a larger proportion elected to toss a coin to decide which patient to treat. A majority (58%-86%) were prepared to withdraw treatment from a patient in intensive care who had a lower chance of survival than another patient currently presenting with COVID-19. Respondents also indicated a willingness to give higher priority to healthcare workers and to patients with young children.Conclusion
Members of the UK general public potentially support a broadly utilitarian approach to ICU triage in the face of overwhelming need. Survey respondents endorsed the relevance of patient factors currently included in triage guidance, but also factors not currently included. They supported the permissibility of reallocating treatment in a pandemic.