Hypnagogic and hypnopompic experiences (HHEs) accompanying sleep paralysis (SP) are often cited as sources of accounts of supernatural nocturnal assaults and paranormal experiences. Descriptions of such experiences are remarkably consistent across time and cultures and consistent also with known mechanisms of REM states. A three-factor structural model of HHEs based on their relations both to cultural narratives and REM neurophysiology is developed and tested with several large samples. One factor, labeled Intruder, consisting of sensed presence, fear, and auditory (...) and visual hallucinations, is conjectured to originate in a hypervigilant state initiated in the midbrain. Another factor, Incubus, comprising pressure on the chest, breathing difficulties, and pain, is attributed to effects of hyperpolarization of motoneurons on perceptions of respiration. These two factors have in common an implied alien ''other'' consistent with occult narratives identified in numerous contemporary and historical cultures. A third factor, labeled Unusual Bodily Experiences, consisting of floating/flying sensations, out-of-body experiences, and feelings of bliss, is related to physically impossible experiences generated by conflicts of endogenous and exogenous activation related to body position, orientation, and movement. Implications of this last factor for understanding of orientational primacy in self-consciousness are considered. Central features of the model developed here are consistent with recent work on hallucinations associated with hypnosis and schizophrenia. (shrink)

Isolated sleep paralysis is a common parasomnia characterized by an inability to move or speak and often accompanied by hallucinations of a sensed presence nearby. Recent research has linked ISP, and sensed presence more particularly, with social anxiety and other psychopathologies. The present study used a large sample of respondents to an internet questionnaire to test whether these associations are due to a general personality factor, affect distress, which is implicated in nightmare suffering and hypothesized to involve dysfunctional (...) social imagery processes. A new measure, ISP distress, was examined in relation to features of ISP experiences, to self-reported psychopathological diagnosis, to scores on the Leibowitz Social Anxiety Scale and to scores on a new questionnaire subscale assessing social imagery in a variety of waking states. Three main results were found: ISP experiences are only weakly associated with a prior diagnosis of mental disorder, sensed presence during ISP is associated preferentially with ISP distress, and ISP distress is associated with dysfunctional social imagery. A general predisposition to affective distress may influence the distress associated with ISP experiences; overly passive social imagery may, in turn, be implicated in this affect distress influence. (shrink)

Previously we reported a three-factor structure for hallucinations accompanying sleep paralysis . These earlier analyses were, however, based on retrospective accounts. In a prospective study, 383 individuals reported individual episodes online providing further evidence for the three-factor structure as well as clearer conceptually meaningful relations among factors than retrospective studies. In addition, reports of individual episodes permitted a more fine-grained analysis of the internal structure of factors to assess predictions based on the hypothesis that a sensed or felt (...) presence is a core experience affecting other SP hallucinations. Results were generally consistent with this hypothesis. In particular, associations among, and temporal stability of, sensory hallucinations were largely explained by their common association with FP. The findings are consistent with REM initiation of a threat activated vigilance system with pervasive effects on the SP experience and suggest a potential model for the thematic organization of nightmares and dreams more generally. (shrink)

Llewellyn's proposal that rapid eye movement dreaming reflects elaborative encoding mediated by the hippocampus offers an interesting perspective for understanding hallucinations accompanying sleep paralysis. SP arises from anomalous intrusion of REM processes into waking consciousness, including threat-detection systems mediated by the amygdala. Unique aspects of SP hallucinations offer additional prospects for investigation of Llewellyn's theory of elaborative encoding.

This paper examines the forms of life established through the visual governance of the Australian social security mobile app —the Express Plus Centrelink app. It is argued that the app exceeds established accounts of juridical and administrative power. The app involves a seeing that is not public, a responding that is not writing and a de-materialisation of an institution and its disciplinary apparatus. It is argued that the app creates proto-literate subjects that are required to respond to a real-time sequence (...) of images in a highly structured and circumscribed manner to become complicit in the digitalisation of their life. (shrink)

Dreams of chase or pursuit, falling, sex, flying, nudity, failing an examination, one's own and other's death, fire, teeth falling out and some other themes experienced, even if only rarely, by many people all over the world have been labelled 'typical dreams'. This essay argues that typical dreaming, rather a syndrome of themes than monothematic, reflects an extraordinary state of mind and brain. Odd and particularly memorable perceptions, as well as emerging awareness of sleep and dreaming -- i.e. parallels (...) to lucid dreaming, sleep paralysis, complex partial seizure, epileptic and migraine auras, and aspects of dreaming after trauma -- can be traced with some plausibility in all prominent variants of typical dreaming. When viewed from this perspective, for example, dream pursuers are much more a shadow of the bodily self than a metaphor for the psycho- biographical situation or evolutionarily implemented sparring partners who make dreamers fit for the struggle for survival during waking hours. (shrink)

A 'sensed presence' often accompanies hypnagogic and hypnopompic hallucinations associated with sleep paralysis. Qualitative descriptions of the sensed presence during sleep paralysis are consistent with the experience of a monitoring, stalking predator. It is argued that the sensed presence during sleep paralysis arises because of REM-related endogenous activation of a hypervigilant and biased attentive state, the normal function of which is to resolve ambiguities inherent in biologically relevant threat cues. Given the lack of disambiguating (...) environmental cues, however, the feeling of presence persists as a protracted experience that is both numinous and ominous. This experience, in turn, shapes the elaboration and integration of the concurrent hallucinations that often take on supernatural and daemonic qualities. The sense of presence considered here is an 'other' that is radically different from, and hence more than a mere projection of, the self. Such a numinous sense of otherness may constitute a primordial core consciousness of the animate and sentient in the world around us. (shrink)

Cheyne and Girard characterize felt presence during sleep paralysis attacks as a pre-hallucinatory expression of a threat-activated vigilance system. While their results may be consistent with this interpretation, they are nonetheless correlational and do not address a parsimonious alternative explanation. This alternative stipulates that FP is a purely spatial, hallucinatory form of a common cognitive phenomenon—social imagery—that is often, but not necessarily, linked with threat and fear and that may induce distress among susceptible individuals. The occurrence of both (...) fearful and non-fearful FPs in a multiplicity of situations other than sleep paralysis attacks supports the notion that FPs are hallucinatory variants of social imagery and that they are not necessarily bound to threat-activated vigilance. Evidence linking FPs with anxiety disorders supports the notion that the distress they evoke may be mediated by a more general affective distress personality factor. To illustrate the predominantly spatial character of FP hallucinations, similarities between FP and phantom limbs are summarized and the possibility that these two phenomena are parallel expressions of a mirror neuron system is considered. (shrink)

Threat themes are clearly over-represented in dreams. Threat is, however, not the only theme with potential evolutionary significance. Even for hypnagogic and hypnopompic hallucinations during sleep paralysis, for which threat themes are far commoner than for ordinary dreaming, consistent non-threat themes have been reported. Revonsuo's simulation hypothesis represents an encouraging initiative to develop an evolutionary functional approach to dream-related experiences but it could be broadened to include evolutionarily relevant themes beyond threat. It is also suggested that Revonsuo's evolutionary (...) re-interpretation of dreams might profitably be compared to arguments for, and models of, evolutionary functions of play. [Revonsuo]. (shrink)

Nielsen [Nielsen, T. . Felt presence: Paranoid delusion or hallucinatory social imagery? Consciousness and Cognition, 16, 975–983.] raises a number of issues and presents several provocative arguments worthy of discussion regarding the experience of the felt presence during sleep paralysis . We consider these issues beginning with the nature of FP and its relation to affective-motivational systems and provide an alternative to Nielsen’s reduction of FP to a purely spatial hallucination. We then consider implications of the “normal social (...) imagery” model. We can find only one specific empirical hypothesis articulated within this framework and it turns out to be one that we explicitly addressed in our original paper. We also review our position regarding the possible relation of FP during SP to a number of related anomalous experiences and contrast FP to anomalous vestibular-motor phenomena. We review our position that the neuromatrix concept, in the light of available evidence, is more appropriately applied to V-M experiences than FP. Finally, we pursue speculations, raised in Nielsen’s commentary, on the wider implications of FP. (shrink)

This report presents the personal experiences of three individuals who ingested iboga or ibogaine in different contexts and for different reasons. Narrative analysis reveals a connection with previously identified phenomenological categories of experience, however demonstrating a wide variability. Most notably, each of these interviewees reported a distinct impression of transpersonal communication, either with “iboga/ine” or with visions of others encountered in the oneirogenic experience. This relates with a sense of transpersonal presence that is mentioned elsewhere in literature describing waking REM (...) experiences, such as sleep paralysis. Within these cases, a sense of transpersonal intersubjectivity appears to contribute a sense of ontological realism and meaningfulness of the experiences. Similar deep engagement with narrative reports may better inform future research, as well as ibogaine‐assisted therapies. (shrink)

Blackmore and Rose reported an experiment designed to examine the operation of psi when reality and imagination were confused. The original experiment used a situation in which participants were encouraged to generate false memories of common household objects. The topic of false memory is highly relevant to parapsychologists and psychical researchers in two ways. First, it may be the case that psi lurks in this borderline between reality and imagination. There are abundant examples of phenomena that appear to utilise such (...) a confusion: spontaneous cases, which often involve “realistic dreams,” lucid dreams, false awakenings, hypnagogic images, waking imagery, and sleep paralysis; and states in which reality and imagination are often confused. The occult traditions, for example, shamanistic traditions that entail the use of drugs and sensory deprivation to induce altered states of consciousness in which imagery is enhanced, and experienced journeys are interpreted as real excursions. Finally, laboratory psi techniques, for example, the use of hypnosis or encouraging imagery to arise unbidden, can also be thought of as utilising this kind of confusion. Alternatively, confusions between reality and imagination can represent a serious problem for parapsychologists and psychical researchers who often have to rely on eyewitness reports of spontaneous, ostensibly psychic, or paranormal events. The fact that the investigation of. (shrink)

Felt presence, a sensation that “someone is there”, is an integral part of our everyday experience. It can manifest itself in a variety of forms ranging from most subtle fleeting impressions to intense hallucinations of demonic assault or visions of the divine. Felt presence phenomenon outside of the context of neurological disorders is largely neglected and not well understood by contemporary science. This paper focuses on the experiential and expressive qualities of the phenomenon and attempts to bring forth the complexity (...) and the richness of possibilities for inter- and intrasubjective awareness represented by these experiences. Are these simply misperceptions and hallucinations heightened and enforced by the mystical or superstitious mind? Or are these entities projections of our own “selves”, elements of self-estrangement? How are such experiences shaping our understanding of ourselves and of others? And finally, what is the interplay between intersubjective, private experiences and private or public spaces of dwelling? (shrink)

Patients with right parietal lesions often deny their paralysis , but do they have "tacit" knowledge of their paralysis? I devised three novel tests to explore this. First, the patients were given a choice between a bimanual task vs a unimanual one . They chose the former on 17 of 18 trials and, surprisingly, showed no frustration or learning despite repeated failed attempts. I conclude that they have no tacit knowledge of paralysis . Second, I used a (...) "virtual reality box" to convey the optical illusion to the patient that she was moving her paralyzed left hand up and down to the rhythm of a metronome, and yet she showed no sign of surprise. Third, I irrigated patient BM′s left ear canal with cold water, a procedure that is known to shift that patient′s spatial frame of reference by stimulating the vestibular system. Surprisingly, this allowed her "repressed" memory of paralysis to come to the surface; she said she had been paralyzed continuously for several days. I suggest that the vestibular stimulation produces these remarkable effects by mimicking REM sleep. These patients also emply a whole arsenal of grossly exaggerated Freudian "defense mechanisms" to account for their paralysis. To explain this, I propose that in normal individuals the left hemisphere ordinarily deals with small, local anomalies by trying to impose consistency but, when the anomaly exceeds threshold, an interaction with the right hemisphere forces a "paradigm shift". A failure of this process, in patients with right hemisphere damage, might partially account for anosognosia. Finally, I present a new conceptual framework that may help link several psychological and neurological phenomena such as Freudian defense mechanisms, vestibular stimulation, anosognosia, memory repression, visual illusions, anterograde amnesia, REM sleep, dreaming, and humor. (shrink)

Miguel is an eighteen‐year‐old male transferred to Alamo Hospital for antivenom treatment after a rattlesnake bite while sleeping on railroad tracks. His “coyote,” an individual who guides undocumented people across the U.S. border from Mexico, dropped him off at a clinic. By the time Miguel was transferred from the clinic to Alamo, he was in complete paralysis and at risk for heart failure, requiring ventilator support to breathe. A person who receives treatment for a snake bite within one to (...) two hours has a 99 percent chance of recovery, but for Miguel, at least fifteen hours had already passed.A hospital ethicist at Alamo contacted the Mexican consulate, and together they arranged for Miguel's father to come to Alamo and make decisions for him. His physicians have determined that he is in a persistent vegetative state and can no longer benefit from hospital treatment. However, no long‐term care facility will accept him. Miguel is undocumented and unfunded.Miguel's father wishes to take his son home, but the cost of transporting him is high,and their home state in Mexico has no ventilator available for him and no consistent supply of electricity to run it. What should the hospital do? (shrink)

Miguel is an eighteen‐year‐old male transferred to Alamo Hospital for antivenom treatment after a rattlesnake bite while sleeping on railroad tracks. His “coyote,” an individual who guides undocumented people across the U.S. border from Mexico, dropped him off at a clinic. By the time Miguel was transferred from the clinic to Alamo, he was in complete paralysis and at risk for heart failure, requiring ventilator support to breathe. A person who receives treatment for a snake bite within one to (...) two hours has a 99 percent chance of recovery, but for Miguel, at least fifteen hours had already passed. A hospital ethicist at Alamo contacted the Mexican consulate, and together they arranged for Miguel's father to come to Alamo and make decisions for him. His physicians have determined that he is in a persistent vegetative state and can no longer benefit from hospital treatment. However, no long‐term care facility will accept him. Miguel is undocumented and unfunded. Miguel's father wishes to take his son home, but the cost of transporting him is high,and their home state in Mexico has no ventilator available for him and no consistent supply of electricity to run it. What should the hospital do? (shrink)

A new philosophical analysis is provided of the notorious Sleeping Beauty Problem. It is argued that the correct solution is one-third, but not in the way previous philosophers have typically meant this. A modified version of the Problem demonstrates that neither self-locating information nor amnesia is relevant to the core Problem, which is simply to evaluate the conditional chance of heads given an undated Monday-or-Tuesday awakening. Previous commentators have failed to appreciate the significance of the information that Beauty gains upon (...) waking, and which is relevant to the conditional chance of heads: de re acquaintance with the awakening itself and the non-locating knowledge that it is an experimental awakening. David Lewis and company are committed to several unjustifiable and unacceptable probability assessments. Previous commentators have in effect confused the information that Beauty undergoes this particular experimental awakening for the information that she undergoes some experimental awakening or other. Lewis in particular thereby illegitimately tips the scales both in favor of heads and in favor of Monday. The Sleeping Beauty Problem is equivalent to a ball-in-urn word problem in elementary probability theory. (shrink)

Given plausible assumptions about the long-run impact of our everyday actions, we show that standard non-consequentialist constraints on doing harm entail that we should try to do as little as possible in our lives. We call this the Paralysis Argument. After laying out the argument, we consider and respond to a number of objections. We then suggest what we believe is the most promising response: to accept, in practice, a highly demanding morality of beneficence with a long-term focus. GPI (...) Working Paper No. 6-2019. (shrink)

Many everyday actions have major but unforeseeable long-term consequences. Some argue that this fact poses a serious problem for consequentialist moral theories. We argue that the problem for non-consequentialists is greater still. Standard non-consequentialist constraints on doing harm combined with the long-run impacts of everyday actions entail, absurdly, that we should try to do as little as possible. We call this the Paralysis Argument. After laying out the argument, we consider and respond to a number of objections. We then (...) suggest what we believe is the most promising response: to accept, in practice, a highly demanding morality of beneficence with a long-term focus. (shrink)

Sleep and dreaming are important daily phenomena that are receiving growing attention from both the scientific and the philosophical communities. The increasingly popular predictive brain framework within cognitive science aims to give a full account of all aspects of cognition. The aim of this paper is to critically assess the theoretical advantages of Predictive Processing (PP, as proposed by Clark 2013, Clark 2016; and Hohwy 2013) in defining sleep and dreaming. After a brief introduction, we overview the state (...) of the art at the intersection between dream research and PP (with particular reference to Hobson and Friston 2012; Hobson et al. 2014). In the following sections we focus on two theoretically promising aspects of the research program. First, we consider the explanations of phenomenal consciousness during sleep (i.e. dreaming) and how it arises from the neural work of the brain. PP provides a good picture of the peculiarity of dreaming but it can’t fully address the problem of how consciousness comes to be in the first place. We propose that Integrated Information Theory (IIT) (Oizumi et al. 2014; Tononi et al. 2016) is a good candidate for this role and we will show its advantages and points of contact with PP. After introducing IIT, we deal with the evolutionary function of sleeping and dreaming. We illustrate that PP fits with contemporary researches on the important adaptive function of sleep and we discuss why IIT can account for sleep mentation (i.e. dreaming) in evolutionary terms (Albantakis et al. 2014). In the final section, we discuss two future avenues for dream research that can fruitfully adopt the perspective offered by PP: (a) the role of bodily predictions in the constitution of the sleeping brain activity and the dreaming experience, and (b) the precise role of the difference stages of sleep (REM (Rapid eye movement), NREM (Non-rapid eye movement) in the constitution and refinement of the predictive machinery. (shrink)

What degrees of belief does Sleeping Beauty's evidence support? That depends.

The implications of this example for the philosophy of action are, of course, important: at the very least, it casts serious doubt on the often heard view that the notion of volition is a mere invention of philosophers, having no use outside philosophical contexts. It is, then, worthy of study. But many recent philosophers have paid practically no attention to actual cases of paralysis. Instead, they have preferred to deal a priori with the possibility of a paralytic trying to (...) perform a bodily movement, and to deal with it in such a way that the occurrence of acts of volition, to which they have theoretical objections, need not be admitted in the theory of action. I have undertaken a theoretical defense of volition elsewhere, so we shall deal little with such objections here. Instead, we shall focus on the subject of trying, and especially on attempts like that described above, which seem to me to have been badly misunderstood. It will be my contention that trying is generally present in intentional, overt action, that in cases of paralysis trying has substantially the same features it has in relatively uncontroversial cases, and that the attempts of paralytics constitute sound evidence that acts of volition occur typically when bodily movements are performed. (shrink)

Explores deep sleep (susupti), one of the three states of consciousness in Advaita Vedanta, and the major role it plays in this philosophy.

The Sleeping Beauty problem is presented in a formalized framework which summarizes the underlying probability structure. The two rival solutions proposed by Elga and Lewis differ by a single parameter concerning her prior probability. They can be supported by considering, respectively, that Sleeping Beauty is “fuzzy-minded” and “blank-minded”, the first interpretation being more natural than the second. The traditional absent -minded driver problem is reinterpreted in this framework and sustains Elga’s solution.

In Sleeping with Extra-Terrestrials , Wendy Kaminer argues that we are a society intoxicated by the irrational: religion, spirituality, and popular therapies threaten to replace rational thought with supernaturalism and impassioned but unexamined personal testimony. Ranging from our fascination with angels, aliens, and near- death experiences to the rise of junk science, the recovery movement, and the digital culture, Kaminer points out the amusing and ominous effects of our deference to spiritual authorities and resistance to critical thinking. She questions conventional (...) wisdom about the association of religious belief with virtue, identifying the sectarianism of efforts to establish religion in the public square. With both wit and empathy, Kaminer takes on what many people hold sacred. Kaminer is an eloquent and incisive critic and rationalist living in a superstitious, evangelical age. In Sleeping with Extra-Terrestrials she challenges us to exercise skepticism, reason, and irreverence and to appreciate the pleasures of free inquiry. (shrink)

This paper examines three accounts of the sleeping beauty case: an account proposed by Adam Elga, an account proposed by David Lewis, and a third account defended in this paper. It provides two reasons for preferring the third account. First, this account does a good job of capturing the temporal continuity of our beliefs, while the accounts favored by Elga and Lewis do not. Second, Elga’s and Lewis’ treatments of the sleeping beauty case lead to highly counterintuitive consequences. The proposed (...) account also leads to counterintuitive consequences, but they’re not as bad as those of Elga’s account, and no worse than those of Lewis’ account. (shrink)

Cian Dorr (2002) gives an argument for the 1/3 position in Sleeping Beauty. I argue this is based on a mistake about Sleeping Beauty's epistemic position.

Adam Elga takes the Sleeping Beauty example to provide a counter-example to Reflection, since on Sunday Beauty assigns probability 1/2 to H, and she is certain that on Monday she will assign probability 1/3. I will show that there is a natural way for Bas van Fraassen to defend Reflection in the case of Sleeping Beauty, building on van Fraassen’s treatment of forgetting. This will allow me to identify a lacuna in Elga’s argument for 1/3. I will then argue, however, (...) that not all is well with Reflection: there is a problem with van Fraassen’s treatment of forgetting. Ultimately I will agree with Elga’s 1/3 answer. David Lewis maintains that the answer is 1/2; I will argue that cases of forgetting can be used to show that the premiss of Lewis’s argument for 1/2 is false. (shrink)

The Sleeping Beauty problem is test stone for theories about self-locating belief, i.e. theories about how we should reasons when data or theories contain indexical information. Opinion on this problem is split between two camps, those who defend the "1/2 view" and those who advocate the "1/3 view". I argue that both these positions are mistaken. Instead, I propose a new "hybrid" model, which avoids the faults of the standard views while retaining their attractive properties. This model _appears_ to violate (...) Bayesian conditionalization, but I argue that this is not the case. By paying close attention to the details of conditionalization in contexts where indexical information is relevant, we discover that the hybrid model is in fact consistent with Bayesian kinematics. If the proposed model is correct, there are important lessons for the study of self-location, observation selection theory, and anthropic reasoning. (shrink)

The strong law of large numbers and considerations concerning additional information strongly suggest that Beauty upon awakening has probability 1/3 to be in a heads-awakening but should still believe the probability that the coin landed heads in the Sunday toss to be 1/2. The problem is that she is in a heads-awakening if and only if the coin landed heads. So, how can she rationally assign different probabilities or credences to propositions she knows imply each other? This is the problem (...) I address in this article. I suggest that ‘p whenever q and vice versa’ may be consistent with p and q having different probabilities if one of them refers to a sample space containing ordinary possible worlds and the other to a sample space containing centred possible worlds, because such spaces may fail to combine into one composite probability space and, as a consequence, ‘whenever’ may not be well defined; such is the main contribution of this article. 1The Sleeping Beauty Game2Groisman’s and Peter Lewis’s Approaches3Discussing Beauty’s Credences4The Principle of Equivalence's Failure5Making Sense of the Principle of Equivalence's Failure6Elga’s and Lewis’s Approaches7ConclusionAppendix. (shrink)

Terence Horgan defends the thirder position on the Sleeping Beauty problem, claiming that Beauty can, upon awakening during the experiment, engage in “synchronic Bayesian updating” on her knowledge that she is awake now in order to justify a 1/3 credence in heads. In a previous paper, I objected that epistemic probabilities are equivalent to rational degrees of belief given a possible epistemic situation and so the probability of Beauty’s indexical knowledge that she is awake now is necessarily 1, precluding such (...) updating. In response, Horgan maintains that the probability claims in his argument are to be taken, not as claims about possible rational degrees of belief, but rather as claims about “quantitative degrees of evidential support.” This paper argues that the most plausible account of quantitative degree of support, when conjoined with any of the three major accounts of indexical thought in such a way as to plausibly constrain rational credence, contradicts essential elements of Horgan’s argument. (shrink)

In an attempt to critically examine the effects of the abrupt shift from the traditional classroom-based education to distance education in the Philippines, this paper articulates pedagogical concepts that are necessary for a transformative and humanizing academic modalities despite the departure from the old approaches due to the unexpected rise of the new normal in education. I discuss a deconstructive, revolutionary, and inclusive pedagogy that aims to renew certain approaches in order to prevent educational paralysis and give way to (...) alternative avenues that best fit the current and future situations notwithstanding the challenges that this pluralistic age poses to every academic site. (shrink)

I defend the suggestion that the rational probability in the Sleeping Beauty paradox is one third. The reasoning in its favour is familiar: for every heads-waking, there are two tails-wakings. To complete the defense, I rebut the reasoning which purports to justify the competing suggestion – that the correct probability is half – by undermining its premise, that no new information has been received.

Argues for the "thirder" solution to the Sleeping Beauty puzzle. The argument turns on an analogy with a variant case, in which a coin-toss on Monday night determines whether one's memories of Monday are permanently erased, or merely suspended in such a way that they will return some time after one wakes up on Tuesday.

Currently, the most popular views about how to update de se or self-locating beliefs entail the one-third solution to the Sleeping Beauty problem.2 Another widely held view is that an agent‘s credences should be countably additive.3 In what follows, I will argue that there is a deep tension between these two positions. For the assumptions that underlie the one-third solution to the Sleeping Beauty problem entail a more general principle, which I call the Generalized Thirder Principle, and there are situations (...) in which the latter principle and the principle of Countable Additivity cannot be jointly satisfied. The most plausible response to this tension, I argue, is to accept both of these principles, and to maintain that when an agent cannot satisfy them both, she is faced with a rational dilemma. (shrink)

The Sleeping Beauty paradox in epistemology and the many-worlds interpretation of quantum mechanics both raise problems concerning subjective probability assignments. Furthermore, there are striking parallels between the two cases; in both cases personal experience has a branching structure, and in both cases the agent loses herself among the branches. However, the treatment of probability is very different in the two cases, for no good reason that I can see. Suppose, then, that we adopt the same treatment of probability in each (...) case. Then the dominant ‘thirder’ solution to the Sleeping Beauty paradox becomes incompatible with the tenability of the many-worlds interpretation. (shrink)

The Sleeping Beauty problem has spawned a debate between “Thirders” and “Halfers” who draw conflicting conclusions about Sleeping Beauty’s credence that a coin lands Heads. Our analysis is based on a probability model for what Sleeping Beauty knows at each time during the Experiment. We show that conflicting conclusions result from different modeling assumptions that each group makes. Our analysis uses a standard “Bayesian” account of rational belief with conditioning. No special handling is used for self-locating beliefs or centered propositions. (...) We also explore what fair prices Sleeping Beauty computes for gambles that she might be offered during the Experiment. (shrink)

Garrett Sullivan explores the changing impact of Aristotelian conceptions of vitality and humanness on sixteenth- and seventeenth-century literature before and after the rise of Descartes. Aristotle's tripartite soul is usually considered in relation to concepts of psychology and physiology. However, Sullivan argues that its significance is much greater, constituting a theory of vitality that simultaneously distinguishes man from, and connects him to, other forms of life. He contends that, in works such as Sidney's Old Arcadia, Shakespeare's Henry IV and Henry (...) V, Spenser's Faerie Queene, Milton's Paradise Lost and Dryden's All for Love, the genres of epic and romance, whose operations are informed by Aristotle's theory, provide the raw materials for exploring different models of humanness; and that sleep is the vehicle for such exploration as it blurs distinctions among man, plant and animal. (shrink)

The Sleeping Beauty problem has spawned a debate between “thirders” and “halfers” who draw conflicting conclusions about Sleeping Beauty's credence that a coin lands heads. Our analysis is based on a probability model for what Sleeping Beauty knows at each time during the experiment. We show that conflicting conclusions result from different modeling assumptions that each group makes. Our analysis uses a standard “Bayesian” account of rational belief with conditioning. No special handling is used for self-locating beliefs or centered propositions. (...) We also explore what fair prices Sleeping Beauty computes for gambles that she might be offered during the experiment. (shrink)