One of the topics that often comes up in ethical discussions of deep brain stimulation (DBS) is the question of what impact DBS has, or might have, on the patient’s self. This is often understood as a question of whether DBS poses a “threat” to personal identity, which is typically understood as having to do with psychological and/or narrative continuity over time. In this article, we argue that the discussion of whether DBS is a “threat” to (...) class='Hi'>continuity over time is too narrow. There are other questions concerning DBS and the self that are overlooked in discussions exclusively focusing on psychological and/or narrative continuity. For example, it is also important to investigate whether DBS might sometimes have a positive (e.g. a rehabilitating) effect on the patient’s self. To widen the discussion of DBS, so as to make it encompass a broader range of considerations that bear on DBS’s impact on the self, we identify six features of the commonly used concept of a person’s “true self”. We apply these six features to the relation between DBS and the self. And we end with a brief discussion of the role DBS might play in treating otherwise treatment-refractory anorexia nervosa. This further highlights the importance of discussing both continuity over time and the notion of the true self. (shrink)

In this paper, we investigate the diachronic fittingness conditions of admiration – that is, what it takes for a person to continue or cease to be admirable over time. We present a series of cases that elicit judgements that suggest different understandings of admiration over time. In some cases, admirability seems to last forever. In other cases, it seems that it can cease within a person’s lifetime if she changes sufficiently. Taken together, these cases highlight what (...) we call the puzzle of admiration over time. We then present a potential solution to this puzzle. (shrink)

The analysis of personal identity over time (personal persistence) in terms of properties of the first-person perspective has been neglected for quite a while. However, there seems to be an interesting relation between experiential features on the one hand and the notion of personal persistence on the other hand. This idea is famously spelled out in an argument introduced by Barry Dainton (2000; 2005; 2008), according to which diachronic personal persistence con- sists in experiential continuity (stream of (...) consciousness). This paper challenges one central claim of the argument, whose main target is to ward off the threat of factual interruptions in the stream of consciousness. It will be objected that this problem cannot be properly solved. However, the relevance of experiential features to personal persistence can be shown if one leaves behind the question of criteria of personal identity over time and instead turns to the question of what it means to have a sense of self-identity over time. It will be argued that not only experiential continuity but also experiential features of episodic memory characterise the sense of self-identity over time. (shrink)

The text is concerned with a class of two-sided stochastic processes of the form. Here is a two-sided Brownian motion with random initial data at time zero and is a function of. Elements of the related stochastic calculus are introduced. In particular, the calculus is adjusted to the case when is a jump process. Absolute continuity of under time shift of trajectories is investigated. For example under various conditions on the initial density with respect to the Lebesgue (...) measure,, and on with we verify i.e. where the product is taken over all coordinates. Here is the divergence of with respect to the initial position. Crucial for this is the temporal homogeneity of in the sense that,, where is the trajectory taking the constant value. By means of such a density, partial integration relative to a generator type operator of the process is established. Relative compactness of sequences of such processes is established. (shrink)

I am now typing on a computer I bought two years ago. The computer I bought is identical to the computer on which I type. My computer persists over time. Let us divide our subject matter in two. There is first the question of criteria of identity, the conditions governing when an object of a certain kind, a computer for instance, persists until some later time. There are secondly very general questions about the nature of persistence itself. (...) Here I include the question of temporal parts, as well as certain familiar paradoxes (e.g., the statue and the lump). Following John Perry (1975, Introduction), let us characterize a criterion of identity over time for F s as a way of filling in φ in the following schema: Stages S1 and S2 belong to some continuing F iff φ Defenders of temporal parts (see below) regard S1 and S2 as being temporal parts of the continuing F ; others regard S1 and S2 as different stages in the life history of the continuing F . Thus each camp can make use of Perry’s formula. It is traditional to divide such criteria into those governing persons and those governing anything else. It is further traditional to say that the criterion of identity over time for non-persons involves spatiotemporal continuity. An excellent discussion is Eli Hirsch’s The Concept of Identity1, which utilizes the notion of continuity under a sortal. Kind-terms, or sortals, are terms that specify what kind of or sort of thing an object is. Examples include ‘tree’, ‘car’, and ‘mountain’. Where F is a sortal, Hirsch’s analysis is roughly that stages belong to the same F iff they are connected by a spatiotemporally and qualitatively continuous sequence of F -stages. Unmodified, this analysis prohibits temporally discontinuous entities, such as a watch that is taken apart and then reassembled. Hirsch discusses the necessary modifications. Spatiotemporal continuity analyses face a problem when applied to the persistence of matter. The literature here has been dominated by discussion of examples provided by David Armstrong (1980) and Saul Kripke (unpublished.... (shrink)

Identity-Over-Time has been a favorite subject in the literature concerning Thomas Aquinas. Aquinas addresses this issue in many discussions, including especially the identity of material things and artifacts, the identity of the human soul after the corruption of body, the identity of the body of Christ in the three days from his death to his resurrection and the identity of the resurrected human body at the end of time. All these discussions have a point in common: they (...) lead Aquinas to raise the question of Identity-Over-Time with respect to things that fully exist in act, i.e., things that possess an identity of their own and change some of their parts or properties over time while continuing to be what they are. In this article, I investigate this topic from a different angle, considering the case of the trans-temporal identity of things that do not yet have an identity of their own or fully exist in act. The case at stake is that of the identity of the human embryo through the process of human generation. It is a puzzle that Aquinas seems to have some difficulties to solving, given his account of human embryogenesis as a process that alternates generations and corruptions of the subject. At the same time, though, Aquinas does not want to renounce the idea that the subject of generation must be numerically one and the same throughout all the process. In order to solve this puzzle, Aquinas seems to suggest distinguishing the identity of the subject from the identity of its matter and/or form. At given conditions, a thing can even change its matter and form while continuing to be the same thing in number. Specifically, the numerical identity of the subject of generation is justified by the identity entailed by the metaphysical notions of potency and act. (shrink)

Automatic preferences can influence a decision maker’s choice before any relevant or meaningful information is available. We account for this element of human cognition in a computational model of problem solving that involves active trial and error and show that automatic biases are not just a beneficial or detrimental property: they are a tool that, if properly managed over time, can give rise to superior performance. In particular, automatic preferences are beneficial early on and detrimental at later stages. (...) What is more, additional value can be generated by a timely rebiasing, i.e., a calculated reversal of the initial automatic preference. Remarkably, rebiasing can dominate not only debiasing but also continuously unbiased decision making. This research contributes to the debate on the adaptiveness of automatic and intuitive biases, which has centered primarily on one-shot controlled laboratory experiments, by simulating outcomes across extended time spans. We also illustrate the value of the novel intervention of adopting the opposite automatic preference—something organizations can readily achieve by changing key decision makers—as opposed to attempting to correct for or simply accepting the ubiquity of such biases. (shrink)

Dissociative experiences have been associated with diachronic disunity. Yet, this work is in its infancy. Dissociative identity disorder is characterized by different identity states reporting their own relatively continuous sense of self. The degree to which patients in dissociative identity states experience diachronic unity has not been empirically explored. This study examined the degree to which patients in dissociative identity states experienced diachronic unity. Participants were DID adults assessed in adult and child identity states, adults with a psychotic illness, adults (...) from the general population, children from the general population and adults imagining themselves as children. They completed the Diachronic Disunity Scale, the Dissociative Experiences Scale, and the Self-Concept Clarity Scale. Diachronic disunity was not limited to psychiatric groups, but evident to some degree in all adult and child samples. The DID adult sample experienced more dissociation and self-confusion than the psychosis and adult comparison groups, but did not differ on the diachronic measure. DID patients in their child identity states and child comparisons showed disunity and were significantly different from child simulators, who showed relatively more unity. Results suggest that DID patients in either adult or child dissociative identity states, like those in other samples, do not universally experience themselves as having a consistent sense of self over time. (shrink)

Van Gelder's clear distinction between the quantitative nature of dynamical systems and the nonquantitative nature of computational processes provides a firm basis for distinguishing between processes that happen in time and processes that happen over time. Symbolic reasoning, the presumed basis of intelligent behavior in robots, happens over time. However, the movements and actions that robots must make to behave intelligently, happen in time. Attempting to connect the two, as classical artificial intelligence and robotics (...) have presumed to be necessary, has produced a tension and an arbitrarily moving interface in the construction of robots. Adopting a robotic version of the dynamical hypothesis offers sound theoretical and scientific justification for those robotics researchers who continue to insist that getting the interaction dynamics of intelligent behavior right is a purely dynamical matter, and never a symbolic computational one. (shrink)

In three studies, we explored the retention and transfer of tool-making knowledge, learnt from an adult demonstration, to other temporal and task contexts. All studies used a variation of a task in which children had to make a hook tool to retrieve a bucket from a tall transparent tube. Children who failed to innovate the hook tool independently saw a demonstration. In Study 1, we tested children aged 4 to 6 years (N = 53) who had seen the original demonstration (...) 3 months earlier. Performance was excellent at the second time, indicating that children’s knowledge was retained over the 3 month period. In Studies 2 and 3 we explored transfer of the new knowledge to other tasks. In Study 2, children were given two variants of the apparatus that differed in surface characteristics (e.g. shape and colour). Participants generalised their knowledge to these new apparatuses even though the new pipecleaner also differed in size and colour. Five- to 6-year-olds (n = 22) almost always transferred their knowledge to problems where the same tool had to be made. Younger, 3- to 5-year-olds’ (n = 46), performance was more variable. In Study 3, 4- to 7-year-olds (N = 146) saw a demonstration of hook making with a pipecleaner, but then had to make a tool by combining pieces of wooden dowel (or vice versa: original training on dowel, transfer to pipecleaner). Children did not transfer their tool-making knowledge to the new material. Children retained tool-making knowledge over time and transferred their knowledge to new situations in which they needed to make a similar tool from similar materials, but not different materials. We concluded that children’s ability to use tool-making knowledge in novel situations is likely to depend on memory and analogical reasoning, with the latter continuing to develop during middle childhood. (shrink)

The interventionist theory of causation has been advertised as an empirically informed and more nuanced approach to causality than the competing theories. However, previous literature has not yet analyzed the regression discontinuity (hereafter, RD) and the difference-in-differences (hereafter, DD) within an interventionist framework. In this paper, I point out several drawbacks of using the interventionist methodology for justifying the DD and RD designs. However, I argue that the first step towards enhancing our understanding of the DD and RD designs from (...) an interventionist perspective is to take advantage of the assumptions of common trend and continuity. (shrink)

One of the goals of computerized tutoring systems is to optimize the learning of facts. Over a hundred years of declarative memory research have identified two robust effects that can improve such systems: the spacing and the testing effect. By making optimal use of both and adjusting the system to the individual learner using cognitive models based on declarative memory theories, such systems consistently outperform traditional methods. This adjustment process is driven by a continuously updated estimate of the rate (...) of forgetting for each item and learner on the basis of the learner's accuracy and response time. In this study, we investigated to what extent these estimates of individual rates of forgetting are stable over time and across different materials. We demonstrate that they are stable over time but not across materials. Even though most theories of human declarative memory assume a single underlying rate of forgetting, we show that, in practice, it makes sense to assume different materials are forgotten at different rates. If a computerized, adaptive fact-learning system allowed different rates of forgetting for different materials, it could adapt to individual learners more readily. (shrink)

Media reports that a company behaves in a socially nonresponsible manner frequently result in consumer participation in a boycott. As time goes by, however, the number of consumers participating in the boycott starts dwindling. Yet, little is known on why individual participation in a boycott declines and what type of consumer is more likely to stop boycotting earlier rather than later. Integrating research on drivers of individual boycott participation with multi-stage models and the hot/cool cognition system, suggests a “heat-up” (...) phase in which boycott participation is fueled by expressive drivers, and a “cool-down” phase in which instrumental drivers become more influential. Using a diverse set of real contexts, four empirical studies provide evidence supporting a set of hypotheses on promotors and inhibitors of boycott participation over time. Study 1 provides initial evidence for the influence of expressive and instrumental drivers in a food services context. Extending the context to video streaming services, e-tailing, and peer-to-peer ridesharing, Study 2, Study 3, and Study 4 show that the reasons consumers stop/continue boycotting vary systematically across four distinct groups. Taken together, the findings help activists sustain boycott momentum and assist firms in dealing more effectively with boycotts. (shrink)

One of the goals of computerized tutoring systems is to optimize the learning of facts. Over a hundred years of declarative memory research have identified two robust effects that can improve such systems: the spacing and the testing effect. By making optimal use of both and adjusting the system to the individual learner using cognitive models based on declarative memory theories, such systems consistently outperform traditional methods (Van Rijn, Van Maanen, & Van Woudenberg, 2009). This adjustment process is driven (...) by a continuously updated estimate of the rate of forgetting for each item and learner on the basis of the learner's accuracy and response time. In this study, we investigated to what extent these estimates of individual rates of forgetting are stable over time and across different materials. We demonstrate that they are stable over time but not across materials. Even though most theories of human declarative memory assume a single underlying rate of forgetting, we show that, in practice, it makes sense to assume different materials are forgotten at different rates. If a computerized, adaptive fact‐learning system allowed different rates of forgetting for different materials, it could adapt to individual learners more readily. (shrink)

Modern management reporting on its company''s performance is influenced by individuals ethical considerations. Stakeholders philosophies have continued to change over the last 75 years affecting reporting systems for companies reporting information internally and externally. These fundamental changes in philosophy have affected how information is conveyed. We are not claiming that only one philosophical viewpoint dominates companies reporting practices, but there does appear to be a changing trend of philosophies building on one another. We use resource dependence theory in relationship (...) to a decision-making model to explain changing stakeholders positions over time. This paper argues that six dominant philosophical theories have influenced the way individuals and organizations report financial and other information. Further, these philosophies then are depicted in a model that helps us to understand what influences companies to present themselves to the outside world. A vignette is used to depict changing philosophical views for several companies management report over 75 years. (shrink)

The temporal unity of the self cannot be accounted for by the continuity of causal, factual, or contiguous relations between independently definable mental events, as proposed by Locke and Parfit. The identity of the self over time is normative: it depends on the institutional context of social rules external to the self that determine the relationship between past commitments and current responsibilities. (2005).

Parents, after learning of a life-limiting fetal condition (LLFC), experience emotional distress and must consider options that impact the remainder of the pregnancy, their future lives, and family members. For those who continue, little is known about their longterm presence or absence of regret about their choice, the reasons for this feeling, or its impact on their life. The aim of this research was to examine the concept of decision regret in parents who opted to continue a pregnancy affected by (...) an LLFC. The contextual factors, conditions, and consequences surrounding the presence or absence of regret were analyzed.Data were retrieved from a cross-sectional study using the Quality of Perinatal Palliative Care and Parental Satisfaction Instrument. Participants were parents (N = 405) who experienced a life-limiting prenatal diagnosis and opted to continue their pregnancy. Secondary data analysis examined qualitative responses (121/402) to an item addressing regret. Dimensional analysis was “I Would Do It All Over Again”: Cherishing Time and the Absence of Regret in Continuing a Pregnancy after a Life-Limiting Diagnosis Charlotte Wool, Rana Limbo, and Erin M. Denney-Koelsch used to examine data, identifying context, conditions, and consequences associated with the presence or absence of regret.Absence of regret was articulated in 97.5 percent of participants. Parents valued the baby as a part of their family and had opportunities to love, hold, meet, and cherish their child. Participants treasured the time together before and after the birth. Although emotionally difficult, parents articulated an empowering, transformative experience that lingers over time. (shrink)

This article makes two arguments. First, that advanced information and communication technologies (ICTs) have created multiple parallel flows of consumption that allow us to be productive continuously, in the sense of generating value for the economy. Second, the struggle over social time poses emergent challenges for planning and urban design. After introducing the relevant themes, this article explains how value is derived from labour and the process through which time is made economically productive. Next, it is posited (...) that advanced ICTs, especially mobile devices and associated services, create possibilities for multiple flows of time, freeing consumption from territorial and temporal restrictions, and opening up new forms of labour. This discussion elicits some concerns for those interested in communities and urban space. The article concludes with suggestions for adopting a socio-spatial-temporal outlook to urban planning and design, including designing ‘polyrhythmic’ places and planning for public time. (shrink)

In this paper I examine the temporal dimensions of racialised and colonised embodiment. I draw on the work of Alia Al-Saji, whose phenomenological reading of Frantz Fanon examines the multiple ways in which racism and colonialism affix the racialised and colonised body to that of the past; a temporalisation that serves not only to anachronise these bodies, but also to close off their projective possibilities for being or becoming otherwise. Such a move reflects the nature of racialisation itself, which following (...) Charles Mills, does not just exteriorise or ‘other’ racialised bodies, but relies equally on a forgetting, or a disavowal and leaving behind of this very process. The result, I argue, is to render whiteness and white bodies as temporally present and even futural in their orientation, free from the vestiges of racism's history and free to adopt any number of stances on its continuing legacy. It is against this that I argue that the familiar exhortation to ‘get over’ racism whenever the charge is levelled, is not only dangerous in its denial of racism, but also disingenuous in purporting to move beyond a racially divided world, when in fact this very gesture serves to reinscribe differential racialised temporalities. (shrink)

The individual and society: Meerloo, J. A. M. Freedom--our mental backbone. Allport, G. Freedom. Marcuse, H. The new forms of control. Kerr, W. A. Psychology of the free competition of ideas. Eysenck, H. J. The technology of consent. Dewey, J. Toward a new individualism. Emerson, R. W. Self-reliance. Fromm, E. Freedom and democracy.--Religion and the inner man: St. Augustine. The freedom and the will. Mercier, L. J. A. Freedom of the will and psychology. Dostoyevsky, F. The grand inquisitor. Berdyaev, N. (...) Master, slave and free man. Buber, M. I and thou. Govinda, A. Time and space and the problem of free will. Prabhavananda, S. Control of the subconscious mind.--Philosophy and philosophical psychology: Bergson, H. Psychological determinism. James, W. The dilemma of determinism. Mill, J. S. The freedom of the will. Sartre, J. P. Being and doing: freedom. Wyschogrod, M. Sartre, freedom and the unconscious. May, R. Will, decision and responsibility: summary remarks. Knight, R. P. Determinism, "freedom," and psychotherapy. Royce, J. Meaning, value, and personality.--Selected bibliography (p. 393-408). (shrink)

This study will explore the Enlightenment conception of the individual of reason, its attempted formulations in actor biographies, and its ultimate denial by the reality of human identity as multiple, fluid, and dialogical. Such fluidity sought to overcome the marginal status of the stage player through the embodiment of rational models of personality. Some stage celebrities, most notably David Garrick, were offering themselves as public models of identity for the new age of reasoned discourse. This involved the presentation before the (...) public of stage performers as fully realized individuals. However, the unavoidable problem was that presenting an individual, even a renowned stage star, as a living paradigm of the enlightened person of reason would prove elusive. Aside from the inherent contradiction of locating any perfected stereotype in an actual person, the qualities making an individual in full conformity to his or her “reason” did not match the particular cultural qualities demanded for a successful eighteenth-century middle-class Englishman or Englishwoman. Nonetheless, by the last quarter of the eighteenth century, significant advances were made both within the particular profession of acting and before the onstage and offstage public. The acting profession was moving quickly and for the first time in England away from its marginalized status to offer respected agents for cultural change. The new genre of actor biographies as well contributed to this more fully realized formulation of the modern individual. (shrink)

This paper looks at the history of identification in England over the past 1,000 years. It contends that techniques and technologies of identification do not identify a single entity but a number of forms of personality, including the juridical person, the citizen and the deviant. Individuals can be the bearers of more than one of these personalities at the same time, or over the course of their life. These personalities are created by social performances to which people (...) are trained to react conventionally. As such identity, and its identification, is a social and cultural phenomenon, rather than a ‘thing’. Each of the personalities noted above has been identified historically in differing ways -through possessions or techniques in the case of the juridical person, though the community in the case of the citizen, and on, or through, the body in the case of the deviant. In the contemporary world these distinctions are being effaced, as all forms of identification are being reduced to the body and the database. This levelling of social forms of being has implication for what it means to be a person in our society, and for public perceptions of new techniques and technologies of identification. (shrink)

In recent years, the psychology of reasoning has been undergoing a paradigm shift, with general Bayesian, probabilistic approaches replacing the older, much more restricted binary logic paradigm. At the same time, dual processing theories have been gaining influence. We argue that these developments should be integrated and moreover that such integration is already underway. The new reasoning paradigm should be grounded in dual processing for its algorithmic level of analysis just as it uses Bayesian theory for its computational level (...) of analysis. Moreover, we propose that, within the new paradigm, these levels of analysis reflect on each other. Bayesianism suggests a specific theoretical understanding of dual processing. Just as importantly, the duality in processing carries over to duality in function; although both types of processes compute degrees of belief, they generate different functions. (shrink)

Almost five million Americans volunteered to serve in the U.S. armed forces between 2001 and 2021 and returned home as discharged veterans. Among them, 30,177 men and women have taken their own lives, an awful toll that is more than five times the number of Americans killed in combat in our twenty-first century wars. As part of the roundtable, “Moral Injury, Trauma, and War,” this essay argues that the reasons are many, but one major factor may be the moral pain (...) that many experience in wartime and the vast emptiness they often encounter when their military service ends. Our society has an obligation to the post–9/11 veterans to understand their experiences and truly welcome them back. The rising toll of veteran suicides suggests there is little time to lose. (shrink)

Understanding the relationship between wilderness outings and the resulting experience has been a central theme in resource-based, outdoor recreation research for nearly 50 years. The authors provide a review and synthesis of literature that examines how people, over time, build relationships with wilderness places and express their identities as consequences of multiple, ongoing wilderness engagements (i.e., continued participation). The paper reviews studies of everyday places and those specifically protected for wilderness and backcountry qualities. Beginning with early origins and (...) working through contemporary research the authors synthesize what diverse social scientists have learned about the long-term and continual nature of wilderness participation and its impact on the formation of identity. The thrust of the paper points researchers, planners, and managers in non-traditional directions and reframes goals and objectives for visitor planning and management in wilderness and other protected areas. (shrink)

Are we the people we were? If we are continuants, then the answer to this question is an affirmative one. But it is a moot point whether anything is a continuant. The debate over this issue—of whether there are such things as continuants—is often conducted in the context of theories concerning the apparent passage of time. Thus it has been argued that the tenseless theory of time, according to which time does not really pass, forces us (...) to tear down part of the basis for the intuitive distinction between ordinary, reidentifiable objects on the one hand, and processes on the other, and to regard such objects as mountains as persisting through time in exactly the way that thunderstorms do: by having distinct temporal parts at different times. I confess that I am a tenseless theorist of time, and take that theory to entail such a conclusion about the persistence of objects. But it is not just a certain stance over time’s passage that motivates sympathy towards temporal parts and suspicion of continuants. Thinking of objects as having temporal parts sits more comfortably than does the rival view with two natural assumptions concerning continuity: that beginning and ceasing to exist, at least for most objects, involves underlying changes which are continuous in nature; and that objects exhibit continuity through time, in the sense of not having gaps in their existence. Or so I shall argue in what follows. (shrink)

Our model of time is the classical continuum of real numbers, and our model of other measurable quantities that change over time is that of functions defined on real numbers with real numbers as values. This model is not derived from reality or from our experience of it, but imposed on reality; and the fit is very imperfect. In classical mathematics, the value of a function for any real number as argument is independent of its value for (...) any other argument: the analogue is Hume's doctrine that events are loose and separate. This makes continuity in the change of any quantity a contingent law of physica, rather than a conceptual necessity. The article explores alternatives to this classical model. (shrink)

Are we the people we were? If we are continuants, then the answer to this question is an affirmative one. But it is a moot point whether anything is a continuant. The debate over this issue—of whether there are such things as continuants—is often conducted in the context of theories concerning the apparent passage of time. Thus it has been argued that the tenseless theory of time, according to which time does not really pass, forces us (...) to tear down part of the basis for the intuitive distinction between ordinary, reidentifiable objects on the one hand, and processes on the other, and to regard such objects as mountains as persisting through time in exactly the way that thunderstorms do: by having distinct temporal parts at different times. I confess that I am a tenseless theorist of time, and take that theory to entail such a conclusion about the persistence of objects. But it is not just a certain stance over time’s passage that motivates sympathy towards temporal parts and suspicion of continuants. Thinking of objects as having temporal parts sits more comfortably than does the rival view with two natural assumptions concerning continuity: that beginning and ceasing to exist, at least for most objects, involves underlying changes which are continuous in nature; and that objects exhibit continuity through time, in the sense of not having gaps in their existence. Or so I shall argue in what follows. (shrink)

The sharp changes in oil prices since 2004 featured a nonlinear data-generating mechanism which displayed bubble-like behavior. A popular view is that such a salient pattern cannot be explained by shifts in economic fundamentals, but was driven by speculative bubbles as a consequence of the increased financialization of oil future markets. Testing this hypothesis, however, is challenging since the fundamental component of the oil price is unobservable. This paper attempts to isolate the contribution of speculative bubbles and fundamentals to the (...) evolution of oil prices by providing a stylized model of commodity pricing. Motivated by our theoretical model, we adopt a continuous-time model with a random and time-varying persistence parameter to empirically investigate the presence of speculative bubbles in daily oil future prices over the period April 1983 to June 2020. We do not find any evidence in favor of speculative bubbles, although we indeed find that oil prices exhibit episodes of unstable behavior after 2004. (shrink)

This paper addresses a question concerning psycho­logical continuity, i.e., which features preserve the same psychological subject over time; this is not the same question as the one concerning the necessary and sufficient conditions for personal identity. Marc Slors defends an account of psychological continuity that adds two features to Derek Parfit’s Relation R, namely narrativity and embodiment. Slors’s account is a significant improvement on Parfit’s, but still lacks an explicit acknowledgment of a third feature that I (...) call relationality. Because they are usually regarded as cases of radical discontinuity, I start my discussion from the experiences of psychological disruption undergone by victims of severe violence and trauma. As it turns out, the challenges we encounter in granting continuity to the experiences of violence and trauma victims are germane to those we encounter in granting continuity to the experiences of subjects in non-traumatic contexts. What is missing in the most popular accounts of psychological continuity is an explicit acknowledgment of the links that tie our psychological lives to other subjects. A more persuasive notion of psychological continuity is not only embodied and narrative, as is Slors’s notion, but also explicitly relational. (shrink)

Philosophically, the most interesting objection to the reliance on advance directives to guide treatment decisions for formerly competent patients is the argument from the loss of personal identity. Starting with a psychological continuity theory of personal identity, the argument concludes that the very conditions that bring an advance directive into play may destroy the conditions necessary for personal identity, and so undercut the authority of the directive. In this article, I concede that if the purpose of a theory of (...) personal identity is to provide an answer to the question What is it for a person to persist over time?, then reflection on personal identity poses a potentially serious threat to the moral authority of advance directives. However, as Marya Schechtman observes, questions about how a single person persists through change are not what most of us are interested in when we think about who a person is. Rather, we are interested in what it means to say that a particular set of actions, experiences, and characteristics is that of a given person rather than someone else. (shrink)

Philosophically, the most interesting objection to the reliance on advance directives to guide treatment decisions for formerly competent patients is the argument from the loss of personal identity. Starting with a psychological continuity theory of personal identity, the argument concludes that the very conditions that bring an advance directive into play may destroy the conditions necessary for personal identity, and so undercut the authority of the directive. In this article, I concede that if the purpose of a theory of (...) personal identity is to provide an answer to the question What is it for a person to persist over time?, then reflection on personal identity poses a potentially serious threat to the moral authority of advance directives. However, as Marya Schechtman observes, questions about how a single person persists through change are not what most of us are interested in when we think about who a person is. Rather, we are interested in what it means to say that a particular set of actions, experiences, and characteristics is that of a given person rather than someone else. (shrink)

We examine the comportment of the global trajectory of a piecewisely conceived single species population growth model. Formulation relies on what we develop as the principle of limiting factors for population growth, adapted from the law of the minimum of Liebig and the law of the tolerance of Shelford. The ensuing paradigm sets natality and mortality rates to express through extreme values of population growth determining factor. Dynamics through time occur over different growth phases. Transition points are interpreted (...) as thresholds of viability, starvation, and intraspecific competition. In this delivery, we focus on the qualitative study of the global trajectory expressed on continuous time and on exploring the feasibility of analytical results against data on populations growing under experimental or natural conditions. All study cases sustained fittings of high reproducibility both at empirical and interpretative slants. Possible phase configurations include regimes with multiple stable equilibria, sigmoidal growth, extinction, or stationarity. Here, we also outline that the associating discrete-time piecewise model composes the logistic map applied over a particular region of the phase configuration. Preliminary exploratory analysis suggests that the logistic map’s chaos onset could surpass once the orbit enters a contiguous phase region. (shrink)

The possibility of continuous backwards time travel—time travel for which the traveler follows a continuous path through space between departure and arrival—gives rise to the double-occupancy problem. The trouble is that the time traveler seems bound to have to travel through his or her younger self as the trip begins. Dowe and Le Poidevin agree that this problem is solved by putting the traveler in motion for a gradual trip to the past. Le Poidevin goes on to (...) argue, however, that the gradual trip gives rise to the Cheshire cat problem, a concern about whether the traveler survives the gradual trip. We address the Cheshire cat problem by proposing and considering new continuity constraints on identity over time. Along the way, we come upon an endurantist conception of temporal parts. (shrink)

I examine the reasons Aristotle presents in Physics VIII 8 for denying a crucial assumption of Zeno’s dichotomy paradox: that every motion is composed of sub-motions. Aristotle claims that a unified motion is divisible into motions only in potentiality (δυνάμει). If it were actually divided at some point, the mobile would need to have arrived at and then have departed from this point, and that would require some interval of rest. Commentators have generally found Aristotle’s reasoning unconvincing. Against David Bostock (...) and Richard Sorabji, inter alia, I argue that Aristotle offers a plausible and internally consistent response to Zeno. I defend Aristotle’s reasoning by using his discussion of what to say about the mobile at boundary instants, transitions between change and rest. There Aristotle articulates what I call the Changes are Open, Rests are Closed Rule: what is true of something at a boundary instant is what is true of it over the time of its rest. By contrast, predications true of something over its period of change are not true of the thing at either of the boundary instants of that change. I argue that this rule issues from Aristotle’s general understanding of change, as laid out in Phys. III. It also fits well with Phys. VI, where Aristotle maintains that there is a first boundary instant included in the time of rest, but not a “first in which the mobile began to change.” I then show how this rule underlies Aristotle’s argument that a continuous motion cannot be composed of actual sub-motions. Aristotle distinguishes potential middles, points passed through en route to a terminus, from actual middles. The Changes are Open, Rests are Closed Rule only applies to actual middles, because only they are boundaries of change that the mobile must arrive at and then depart from. On my reading, Aristotle argues that the instant of arrival, the first instant at which the mobile has come to be at the actual middle, cannot belong to the time of the subsequent motion. If it did, the mobile would already be moving towards the next terminus and thus, per Phys. VI 6, would have already left. But it cannot have moved away from the midpoint at the very same moment it has arrived there. This means that the instant of arrival must be separated from the time of departure by an interval of rest. I show how Aristotle’s reasoning applies generally to rule out any continuous reflexive motion or continuous complex rectilinear motion. On my interpretation, however, the argument does not apply to every change of direction. When, as in the case of projectile motion, multiple movers and their relative powers explain why the mobile changes directions, distinct sub-motions are not involved. Aristotle holds that such motions cannot be continuous, not because they involve intervals of rest, but because they involve multiple causes of motion. My interpretation of the Changes are Open, Rests are Closed Rule allows us to make better sense of Aristotle’s argument than any previous interpretation. (shrink)

What is time? Just like everything else in the world, our understanding of time has changed continually over time. This article tracks this question through the history of Western philosophy and looks at major answers from the likes of Aristotle, Kant, and McTaggart.

Consciousness exists in time, but time is also to be found within consciousness: we are directly aware of both persistence and change, at least over short intervals. On reflection this can seem baffling. How is it possible for us to be immediately aware of phenomena which are not (strictly speaking) present? What must consciousness be like for this to be possible? In "Stream of Consciousness" I argued that influential accounts of phenomenal temporality along the lines developed by (...) Broad and Husserl were fundamentally flawed, and proposed a quite different account: the overlap model. While recognizing that the latter has merits, Gallagher argues that it too is fundamentally flawed; he also takes issue with some of my claims concerning Broad and Husserl. My reply comes in three main parts. I start by clarifying my use of certain terms, in particular realism and anti-realism as applied to theories of phenomenal temporality in general, and the accounts of Broad and Husserl in particular. I then turn to Gallagher’s main criticisms of the overlap theory. Gallagher argues that the theory is sunk by a problem with ongoing contents, that if our experience possessed the structures I ascribe to it, we would be aware of contents as having longer durations than is actually the case. I suggest otherwise: the version of the overlap theory which is afflicted by this difficulty is not the version I put forward, as becomes clear when two distinct forms of overlap are distinguished. Gallagher is also concerned that the theory lacks phenomenological grounding, and has difficulties with experiential holism. The latter worry, I argue, is completely misplaced. While the former has more warrant, it too is rooted in a misconception: the overlap theory was intended only to provide an account of the most basic sensory components of our short-term experience of temporality, and can easily be expanded to accommodate other aspects. I supply a sketch an augmented theory to back up this claim. I conclude with an assessment of the intentional account of time-consciousness Gallagher ascribes to Husserl. A meaning-based account of this kind is incapable of accounting for experienced sensory continuity, or so I argue. I also suggest that both Broad and Husserl may have had leanings towards the Simple Conception of consciousness. -/- . (shrink)

It is unclear whether someone’s responsibility for developing a disease or maintaining his or her health should affect what healthcare he or she receives. While this dispute continues, we suggest that, if responsibility is to play a role in healthcare, the concept must be rethought in order to reflect the sense in which many health-related behaviours occur repeatedly over time and are the product of more than one agent. Most philosophical accounts of responsibility are synchronic and individualistic; we (...) indicate here what paying more attention to the diachronic and dyadic aspects of responsibility might involve and what implications this could have for assessments of responsibility for health-related behaviour. (shrink)

Commonsense ontology contains both continuants and occurrents, but are continuants necessary? I argue that they are neither occurrents nor easily replaceable by them. The worst problem for continuants is the question in virtue of what a given continuant exists at a given time. For such truthmakers we must have recourse to occurrents, those vital to the continuant at that time. Continuants are, like abstract objects, invariants under equivalences over occurrents. But they are not abstract, and their being (...) invariants enables us to infer both their lack of temporal parts and that non-invariant predications about them must be relativized to times. \\\ [Joseph Melia] In this paper I try to eliminate occurrents from our ontology. I argue against Simons' position that occurrents are needed to supply truthmakers for existential claims about continuants. Nevertheless, those who would eliminate occurrents still need some account of our willingness to assert sentences that logically entail their existence. Though it turns out to be impossible to paraphrase away our reference to occurrents, I show that the truthmakers for such sentences are facts that involve only continuants. This is enough to allow us to regard our ordinary talk about occurrents as fictional. Finally, I argue that a proper conception of the underlying temporal facts about continuants can both avoid the problematic tensed theory of time and the problem of temporary intrinsics. (shrink)

Space, Time, Matter, and Form collects ten of David Bostock's essays on themes from Aristotle's Physics, four of them published here for the first time. The first five papers look at issues raised in the first two books of the Physics, centred on notions of matter and form, and the idea of substance as what persists through change. They also range over other of Aristotle's scientific works, such as his biology and psychology and the account of change (...) in his De Generatione et Corruptione. The volume's remaining essays examine themes in later books of the Physics, including infinity, place, time, and continuity. Bostock argues that Aristotle's views on these topics are of real interest in their own right, independent of his notions of substance, form, and matter; they also raise some pressing problems of interpretation, which these essays seek to resolve. (shrink)

In a recent article, Trenton Mericks argues that psychological continuity analyses of personal identity over time are incompatible with endurantism. We contend that if Merricks’s argument is valid, a parallel argument establishes that PC-analyses of personal identity are incompatible with perdurantism; hence, the correct conclusion to draw is simply that such analyses are all necessarily false. However, we also show that there is good reason to doubt that Merricks’s argument is valid.

Using a paradigm that allows a quasi-continuous tracking of memory performance over time, two experiments were designed to test the hypotheses that persons with a cognitively avoidant style of coping with threat manifest a dissociation between short-term and long-term retrieval of aversive information and persons with a vigilant coping style recall aversive information particularly well after long retention intervals, provided they are free to think about aversive events. Study 1 showed that avoiders manifest a poor memory for aversive (...) pictures after long retention intervals only. Study 2 replicated this finding. In addition, manipulation of the cognitive load during the retention interval influenced vigilants’ recall of aversive information in the predicted way. Results indicate that processes occurring during the retention interval are essential for individual difference in memory for aversive information and require similar attention as encoding, appraisal, and retrieval processes. (shrink)

Aristotle is right to argue that the best life is a life of unimpeded activity, but I believe he went wrong in thinking that ordinary human life is, or must be, far removed from the best life. To establish this claim, I offer a historical explanation of what unimpeded activity involves. I use the class of art patrons in Renaissance Florence to show how mathematical skills acquired in everyday life can be applied to widely differing tasks. As patrons extend their (...) mathematical skills, their activities become more self-realizing and hence more continuous in Aristotle's sense. I argue that the activities of the Florentine patron class, to be sustained over time, require many of Aristotle's virtues. Examples like this show, I argue, that reasonably unimpeded activity is an important human good and that it is genuinely desirable to, and within the grasp of, ordinary people, even those who initially claim no interest in virtue. (shrink)

Aristotle is right to argue that the best life is a life of unimpeded activity, but I believe he went wrong in thinking that ordinary human life is, or must be, far removed from the best life. To establish this claim, I offer a historical explanation of what unimpeded activity involves. I use the class of art patrons in Renaissance Florence to show how mathematical skills acquired in everyday life can be applied to widely differing tasks. As patrons extend their (...) mathematical skills, their activities become more self-realizing and hence more continuous in Aristotle's sense. I argue that the activities of the Florentine patron class, to be sustained over time, require many of Aristotle's virtues. Examples like this show, I argue, that reasonably unimpeded activity is an important human good and that it is genuinely desirable to, and within the grasp of, ordinary people, even those who initially claim no interest in virtue. (shrink)

Surveying both historical debates and modern physics, Barry Dainton evaluates the central arguments in a clear and unintimidating way that keeps conceptual issues comprehensible to students with little scientific or mathematical training and makes the philosophy of space and time accessible to anyone trying to come to grips with the complexities of this challenging subject. With over 100 original line illustrations and a full glossary of terms, Time and Space keeps the requirements of students firmly in sight (...) and will continue to serve as the ideal textbook for philosophy of time and space courses. (shrink)

The debate on personal persistence has been characterized by a dichotomy which is due to its still Cartesian framwork: On the one side we find proponents of psychological continuity who connect, in Locke’s tradition, the persistence of the person with the constancy of the first-person perspective in retrospection. On the other side, proponents of a biological approach take diachronic identity to consist in the continuity of the organism as the carrier of personal existence from a third-person-perspective. Thus, what (...) accounts for someone’s persistence over time, is the continuity of his mind on the one hand, and the continuity of his body on the other. In contrast to those views, the paper intends to show that bodily existence represents the basis of selfhood across time, both as the continuity of the experiential self and as the continuity of the autopoietic organism. On the one hand, the lived body conveys a continuity of the self from a first-person perspective, namely a pre-reflective feeling of sameness or a felt constancy of subjectivity. Moreover, an analysis of awakening and sleep shows that there is a continuous transition from full wakefulness to periods of deep sleep which may thus not be regarded as a complete interruption of subjective experience. On the other hand, this constancy converges with the continuity of the organismic life process as conceived from a third-person perspective. Thus, the experiential self of bodily subjectivity and the autopoietic self of the living organism should be regarded as two aspects of one and the same life process. Finally, the lived body also exhibits a specific form of memory that results from the continual embodiment of existence: it consists of all the affinities, capacities and experiences, which a person has acquired throughout his life. Thus, it provides a continuity of self that must not be actively produced through remembering, but rather integrates the person’s entire past in his present being and potentiality. (shrink)

Ethics seeks answers to questions about the moral status of human actions and human lives. What should I do, and what should I not do? What sort of life should I lead? Actions and lives are temporal things. Actions are performed at certain times, are informed by past events and have consequences for the future. Lives have temporal extension, and are experienced from a sequence of temporal perspectives. Thus, one would think that answers to ethical questions should take account some (...) of their temporal features. Yet there has never been a systematic study of the relations between time and ethics. In 2001 a conference was held at the University of Otago in New Zealand on the theme of Time and Ethics to explore issues that emerge at the intersection between these two fields of study. This volume contains revised versions of some of the papers presented at that conference. The essays are collected into three parts, each with its own unifying theme. Part I focuses on parallels between reasoning about time and reasoning about ethics, and shows various ways in which thinking about each of these fields can inform what we should say about the other. Part II looks at the ethical significance of temporal location. Actions, reasons, preferences, consequences, events, pains, persons and (arguably) the possession of a truth-value by a truth bearer, all have temporal location, and this fact turns out to have considerable ethical significance - or so the essays in this section argue. The essays in part III examine issues that arise out of the consideration that persons are both temporal and ethical beings. For instance, given that we typically continue to hold people responsible for their actions at times other than the times at which those actions are performed, we need an account of personal identity over time that can support this moral practice. (shrink)