In this paper, we show that Case-based decision theory, proposed by Gilboa and Schmeidler :605–639, 1995), can explain the aggregate dynamics of cooperation in the repeated Prisoner’s Dilemma, as observed in the experiments performed by Camera and Casari. Moreover, we find CBDT provides a better fit to the dynamics of cooperation than does the existing Probit model, which is the first time such a result has been found. We also find that humans aspire to a payoff above the mutual defection (...) outcome but below the mutual cooperation outcome, which suggests they hope, but are not confident, that cooperation can be achieved. Finally, our best-fitting parameters suggest that circumstances with more details are easier to recall. We make a prediction for future experiments: if the repeated PD were run for more periods, then we would be begin to see an increase in cooperation, most dramatically in the second treatment, where history is observed but identities are not. This is the first application of Case-based decision theory to a strategic context and the first empirical test of CBDT in such a context. It is also the first application of bootstrapped standard errors to an agent-based model. (shrink)

In the literature on free will, fatalism, and determinism, a distinction is commonly made between temporally intrinsic (‘hard’) and temporally relational (‘soft’) facts at times; determinism, for instance, is the thesis that the temporally intrinsic state of the world at some given past time, together with the laws, entails a unique future (relative to that time). Further, it is commonly supposed by incompatibilists that only the ‘hard facts’ about the past are fixed and beyond our control, whereas the ‘soft facts’ (...) about the past needn’t be. A substantial literature arose in connection with this distinction, though no consensus emerged as to the proper way to analyze it. It is time, I believe, to revisit these issues. The central claim of this paper is that the attempts to analyze the hard/soft fact distinction got off on fundamentally the wrong track. The crucial feature of soft facts is that they (in some sense) depend on the future. Following recent work on the notion of dependence, however, I argue that the literature on the soft/hard distinction has failed to capture the sense of dependence at stake. This is because such attempts have tried to capture softness in terms of purely modal notions like entailment and necessitation. As I hope to show, however, such notions cannot capture the sort of asymmetrical dependence relevant to soft facthood. Arguing for this claim is the first goal of this paper. My second goal is to gesture towards what an adequate account of soft facthood will really look like. (shrink)

Investigation of “out-of-body experiences” has implications for understanding both normal bodily-self integration and its vulnerabilities. Beyond reported associations between OBEs and specific brain regions, however, there have been few investigations of neurochemical systems relevant to OBEs. Ketamine, a drug used recreationally to achieve dissociative experiences, provides a real-world paradigm for investigating neurochemical effects. We investigate the strength of the association of OBEs and ketamine use relative to other common drugs of abuse. Self-report data from an online survey indicate that both (...) lifetime frequency of ketamine use and OBEs during ketamine intoxication were more strongly related to the frequency of OBEs and related phenomena than other drugs. Moreover, the apparent effects of other drugs could largely be explained by associated ketamine use. The present results, consistent with the role of NMDA receptors in OBEs, should encourage future studies of the role of neurochemical systems in OBEs. (shrink)

A central question, if not the central question, of philosophy of perception is whether sensory states have a nature similar to thoughts about the world, whether they are essentially representational. According to the content view, at least some of our sensory states are, at their core, representations with contents that are either accurate or inaccurate. Tyler Burge’s Origins of Objectivity is the most sustained and sophisticated defense of the content view to date. His defense of the view is problematic in (...) several ways. The most significant problem is that his approach does not sit well with mainstream perceptual psychology. (shrink)

Is evil a distinct moral concept? Or are evil actions just very wrong actions? Some philosophers have argued that evil is a distinct moral concept. These philosophers argue that evil is qualitatively distinct from ordinary wrongdoing. Other philosophers have suggested that evil is only quantitatively distinct from ordinary wrongdoing. On this view, evil is just very wrong. In this paper I argue that evil is qualitatively distinct from ordinary wrongdoing. The first part of the paper is critical. I argue that (...) Luke Russell’s attempt to show that evil is only quantitatively distinct from ordinary wrongdoing fails. Russell’s argument fails because it is based on an implausible criterion for determining whether two concepts are qualitatively distinct. I offer a more plausible criterion and argue that based on this criterion evil and wrongdoing are qualitatively distinct. To help make my case, I sketch a theory of evil which makes a genuinely qualitative distinction between evil and wrongdoing. I argue that we cannot characterize evil as just very wrong on plausible conceptions of evil and wrongdoing. I focus on act-consequentialist, Kantian, and contractarian conceptions of wrongdoing. (shrink)

A common objection to representationalism is that a representationalist view of phenomenal character cannot accommodate the effects that shifts in covert attention have on visual phenomenology: covert attention can make items more visually prominent than they would otherwise be without altering the content of visual experience. Recent empirical work on attention casts doubt on previous attempts to advance this type of objection to representationalism and it also points the way to an alternative development of the objection.

This paper defines the form of prior knowledge that is required for sound inferences by analogy and single-instance generalizations, in both logical and probabilistic reasoning. In the logical case, the first order determination rule defined in Davies (1985) is shown to solve both the justification and non-redundancy problems for analogical inference. The statistical analogue of determination that is put forward is termed 'uniformity'. Based on the semantics of determination and uniformity, a third notion of "relevance" is defined, both logically and (...) probabilistically. The statistical relevance of one function in determining another is put forward as a way of defining the value of information: The statistical relevance of a function F to a function G is the absolute value of the change in one's information about the value of G afforded by specifying the value of F. This theory provides normative justifications for conclusions projected by analogy from one case to another, and for generalization from an instance to a rule. The soundness of such conclusions, in either the logical or the probabilistic case, can be identified with the extent to which the corresponding criteria (determination and uniformity) actually hold for the features being related. (shrink)

In this issue of the American Journal of Bioethics, manuscripts focus on the obligations of clinicians and researchers in pragmatic clinical trials (Garland, Morain, and Sugarman 2023; Morain and L...

An attempt to show that Plato has a unified approach to the rationality of belief and the rationality of desire, and that his defense of that approach is a powerful one.

This fascinating volume will be invaluable to neuroscientists, psychologists, psychiatrists, neurologists, and philosophers of mind, and to their students and ...

The work is an attempt to answer the transcendental question, "How is progress in philosophy possible?" The character of philosophical beliefs and doubts is examined, and it is argued that in the exigent context of philosophical practice in the agonistic analytic tradition, a certain limited doxastic voluntarism is possible. The role of both ordinary and ideal language intuitions is criticized; it is concluded that these cannot serve as uncontroversial pretheoretical givens of inquiry. As an extended example of the covert adoption (...) of strategies of prescriptive idealization, several theories of meaning are reviewed. A model of philosophical inquiry based upon the notion of transcendental arguments is profferred. This is derived from both Kantian and Peircean antecedents, via the synthesizing efforts of Karl-Otto Apel. Finally, three senses of "progress" are distinguished and several alternative models of philosophical inquiry are assessed in the light of these distinctions. It is concluded that the sort of progress appropriate to philosophy, seen collectively, is non-terminating and non-decidable, relying upon negative consensus generating mechanisms, thus assuring perpetual pluralism. (shrink)

In the opening section of this paper we spell out an account of our na ve view of bodily sensations that is of historical and philosophical significance. This account of our shared view of bodily sensations captures common ground between Descartes, who endorses an error theory regarding our everyday thinking about bodily sensations, and Berkeley, who is more sympathetic with common sense. In the second part of the paper we develop an alternative to this account and discuss what is at (...) stake in deciding between these two ways of understanding our everyday view. In the third and final part of the paper we offer an argument in favour of our alternative. (shrink)

The dominant view among philosophers of perception is that color experiences, like color judgments, are essentially representational: as part of their very nature color experiences possess representational contents which are either accurate or inaccurate. My starting point in assessing this view is Sydney Shoemaker’s familiar account of color perception. After providing a sympathetic reconstruction of his account, I show how plausible assumptions at the heart of Shoemaker’s theory make trouble for his claim that color experiences represent the colors of things. (...) I consider various ways of trying to avoid the objection, and find all of the responses wanting. My conclusion is that we have reason to be skeptical of the orthodox view that color experiences are constitutively representational. (shrink)

The paper defends a pragmatist account of metaethics that challenges the standard view of justificatory structure at the heart of many rule-based normative ethical theories. The standard view of justificatory structure assumes that deliberation must be constrained by antecedent justificatory procedures. I consider some of the radical implications of the pragmatist idea that deliberation is the conceptual context within which to interpret, evaluate, and explain moral justification.

This article makes the case that a more capacious understanding of the philosophy of naturalistic monism can place in a new light some of the chief intellectual, cultural, religious and political questions and conflicts in the period between the 1840s and 1940s, making this in many ways a “monist century.” It approaches this task from two directions. First, the article argues that monism represented a peculiar type of socially embodied knowledge that is little understood and yet which illuminates one of (...) the important ways in which religion, science, and philosophy coalesced in social and political movements in this period. It approaches this task through an analysis of two key terms in Ernst Haeckel’s epoch-making book "The Riddle of the Universe" (1899). Haeckel invoked the term “world riddles” to identify those points of conflict between dualistic and monist philosophical systems and to claim that the latter had solved this riddles through science. By contrast, this article identifies in the riddles the nodal points upon which the entire monist edifice was erected. Turning to the social embodiment of monism, I argue that rather than approaching monism as philosophy, religion, scientific paradigm or ideology, it is best understood as a novel formation of knowledge captured in the second key term “worldview.” Indeed, in many ways the German concept of Weltanschauung developed in tandem with and through the history of monism, so that monism offers a particularly rich avenue for exploring what made the monist century also an age of worldviews. (shrink)

Human life history is unique among primates, most notably the extraordinary length of infant dependency and the formation of long-term pair-bonds. Men and women are motivated to remain pair-bonded to maintain the distribution of male-provisioned resources to a woman and her offspring, or to protect offspring from infanticide. Men and women can employ several strategies to retain their mate and prevent their partner from defecting from the relationship, including individual mate retention (behaviors performed alone) and coalitional mate retention (behaviors performed (...) by a close ally). The current research investigates whether men and women with children perform more frequent mate retention behaviors than men and women without children. Participants (n = 1003) currently in a heterosexual romantic relationship completed a survey, reporting whether they had genetic children with their current romantic partner and how frequently they performed various mate retention behaviors. The results indicate that men (n = 262) and women (n = 234) who share genetic children with their current partner performed more frequent individual mate retention behaviors and requested more frequent coalitional mate retention behaviors than men (n = 280) and women (n = 227) who do not share genetic children with their current partner. The results are interpreted as they relate to hypotheses concerning the evolution of pair-bonding in humans, and mate retention behaviors more generally. Limitations of the current research are discussed, and profitable avenues for future research in this domain are suggested. (shrink)

Future work is needed to establish that pure short-term memory is a coherent individual difference attribute that is separable from traditional compound short-term memory measures. Psychometric support for latent pure short-term memory capacity will provide an important starting point for future fine-grained analyses of the intrinsic factors that influence individual differences in math skills.

During meiosis, homologous chromosomes must pair in order to permit recombination and correct chromosome segregation to occur. Two recent papers1,2 show that meiotic pairing is also important for correct gene expression during meiosis. They describe data for the filamentous fungus Neurospora crassa that show that a lack of pairing generated by ectopic integration of genes can result in silencing of genes expressed during meiosis. This can result in aberrant meioses whose defects are specific to the function of the unpaired gene. (...) Furthermore, mutations affecting the silencing mechanism have been selected in a gene encoding a putative RNA‐dependent RNA polymerase. This finding indicates the involvement of a meiotic specific post‐transcriptional gene silencing mechanism (PTGS) similar to that observed in vegetative cells in N. crassa and other organisms. Finally, this gene product is essential for normal meiosis, suggesting that RNA‐dependent processes are fundamental to the sexual cycle. BioEssays 25:99–103, 2003. © 2003 Wiley Periodicals, Inc. (shrink)

Andrews et al. attempt to clarify the standards for determining whether traits are adaptations. The authors argue that tests of adaptationist hypotheses best proceed by assessing the consistency of the traits with the proposed standards. Critical tests of such standards must assess inconsistency – hypotheses must be falsifiable. To fully understand trait evolution, we must consider both adaptive and nonadaptive hypotheses.

This paper addresses two recent debates in aesthetics: the ‘moralist debate’, concerning the relationship between the ethical and aesthetic evaluations of artworks, and the ‘cognitivist debate’, concerning the relationship between the cognitive and aesthetic evaluations of artworks. Although the two debates appear to concern quite different issues, I argue that the various positions in each are marked by the same types of confusions and ambiguities. In particular, they demonstrate a persistent and unjustified conflation of aesthetic and artistic value, which in (...) turn is based on a more general failure to explicitly tackle the demarcation of aesthetic value. As such, the claims of each side are rendered ambiguous in respect of the relation that is supposed to hold between all these types of value and artistic value. These issues are discussed in light of a recent argument proposed by Matthew Kieran, to undermine, to some extent, the conceptual distinction between aesthetic, cognitive-ethical, and artistic values in our appraisal of art works. In rejecting his argument, I defend the conceptual distinction and a pluralistic conception of artistic value that allows for cognitive and ethical values to count as artistic, but not aesthetic, values. (shrink)

Multiple drug resistant strains of HIV and continuing difficulties with vaccine development highlight the importance of psychologi- cal interventions which aim to in uence the psychosocial and emo- tional factors empirically demonstrated to be significant predictors of immunity, illness progression and AIDS mortality in seropositive persons. Such data have profound implications for psychological interventions designed to modify psychosocial factors predictive of enhanced risk of exposure to HIV as well as the neuroendocrine and immune mechanisms mediating the impact of such factors (...) on disease progression. Many of these factors can be construed as unconscious mental ones, and psychoanalytic self-psychology may be a useful framework for conceptualizing psychic and immune de- fence as well as bodily and self-integration in HIV infection. Al- though further prospective studies and cross-cultural validation of research are necessary, existing data suggest that psychoanalytic insights may be useful both in therapeutic interventions and evaluative research which would require an underlying epistemology of the complementarity of mind and matter. (shrink)

In an interesting passage in the Philebus , Plato associates pure beauty with geometrical forms created by certain measuring tools used both by mathematicians and carpenters. The ‘beauty of figures’ is analysed as' something straight [εθ τι]… and round [περιφερς] and the two- and three-dimensional figures generated from these by [τρνοι] and ruler [κανσ7iota;] and set-squares [γωναι]' He continues: ‘For I maintain that these things are not beautiful in relation to something, as other things are, but they are always beautiful (...) by nature, by themselves…’. (shrink)

We often face a bewildering array of different explanations for the same social facts (e.g. biological, psychological, economic, and historical accounts). But we have few guidelines for whether and when we should think of different accounts as competing or compatible. In this paper, I offer some guidelines for understanding when custom or norm accounts do and don’t compete with other types of accounts. I describe two families of non-competing accounts: (1) explanations of different (but similarly described) facts, and (2) accounts (...) which seem to differ but are really different parts or versions of the same underlying explanation. I argue that, while many types of apparent competitors don’t really compete with customs, there are some that do. I also describe some of the central problems, which suggest that custom accounts will compete poorly with their rivals. (shrink)

This paper defends a broadly Aristotelean account of character friendship that maintains that the impersonal value of acquiring a virtuous character is the ultimate basis for our reasons for caring about friends. This view of friendship appears to conflict with the entrenched intuition that viewing our connections to particular friends as merely contingent occasions for the cultivation of virtue is alienating and undesirable. I argue that far from being an alienating feature of character friendships, a focused appreciation of the contingent (...) nature of friendships represents a morally sound attitude of honest self-acceptance. On my account, honest selfacceptance is an impersonal value—an ideal that anyone has a reason to cultivate. Although the ideal is impersonal, its content specifi es that we appreciatively acknowledge the particular contributions that friends make to the development of virtue. (shrink)

British Journal for the History of Philosophy, Volume 0, Issue 0, Page 1-4, Ahead of Print.

This paper introduces a hybrid model that combines connectionist, symbolic, and reinforcement learning for tackling reactive sequential decision tasks by a situated agent. Both procedural skills and high-level symbolic representations are acquired through an agent's experience interacting with the world, in a bottom-up direction. It deals with on-line learning, that is, learning continuously from on-going experience in the world, without the use of preconstructed data sets or preconceived concepts. The model is a connectionist one based on a two-level approach proposed (...) earlier. Acknowledgements: This work is supported in part by O ce of Naval Research grant N00014-95-1-0440. (shrink)

This study describes the cultural, cognitive, social, and emotional work that once-devout members of the LDS Church must engage in to leave the church and divest themselves of Mormon culture. A Grounded Theory approach with a multi-modal memoing process showed that, for the devout, leaving the LDS Church and Mormon culture is not a singular event, but rather a process of gradual transformation that requires time and effort, passing through a series of punctuating events. Formerly devout ex-Mormons had to confront (...) various problems, including the LDS Church’s truth claims and ethical contradictions from within the particular Mormon framework that leavers believed in and followed, which in turn had shaped and constrained both their leaving process and their post-Mormon selves. Interview data revealed a necessary reconstruction of post-Mormon emotionalities. And devout women who left Mormonism bore an added burden of overcoming internalized misogyny. (shrink)