Phenomenal consciousness or the subjective experience of feeling sensory stimuli is fundamental to human existence. Because of the ubiquity of their subjective experiences, humans seem to readily accept the anthropomorphic extension of these mental states to other animals. Humans will typically extrapolate feelings of pain to animals if they respond physiologically and behaviourally to noxious stimuli. The alternative view that fish instead respond to noxious stimuli reflexly and with a limited behavioural repertoire is defended within the context (...) of our current understanding of the neuroanatomy and neurophysiology of mental states. Consequently, a set of fundamental properties of neural tissue necessary for feeling pain or experiencing affective states in vertebrates is proposed. While mammals and birds possess the prerequisite neural architecture for phenomenal consciousness, it is concluded that fish lack these essential characteristics and hence do not feel pain. (shrink)

Intentional binding describes the phenomenon that actions and their effects are perceived to be temporally approximated. We introduced a new method of duration estimation to the research field, the method of constant stimuli. Participants freely chose to press one of two keys or experienced passive key presses. After an interval of 250 ms or 600 ms a visual effect occurred. In Experiment 1, each key produced an effect after a specific interval. In Experiment 2, both keys produced an effect (...) after the same interval that varied between sessions. Participants compared the duration of the action–effect interval with a tone of varying duration. To assess intentional binding, we compared the perceived duration of the action–effect interval between the active and passive condition. We showed intentional binding for 600 ms, but not for 250 ms action–effect intervals in both experiments. Thus, the method of constant stimuli is suitable to assess intentional binding. (shrink)

Ned Block’s Overflow Argument purports to establish that the neural basis of phenomenal consciousness is independent of the neural basis of access consciousness. In a recent paper, Block’s argument has been challenged by Peter Carruthers. Carruthers concedes the truth of one of the argument’s key steps, namely, that phenomenal consciousness overflows what is in working memory. At the same time, he rejects the conclusion of the argument by developing an account of this overflow that is alternative to Block’s. In this (...) paper, I argue that Carruthers’s account does not pose a real threat to the Overflow Argument. The overall plausibility of Carruthers’s account rests on the empirical plausibility of a claim concerning global broadcasting which, albeit intuitively plausible in light of a lightly-sketched picture of the impact of attention upon neural matters, he offers no sufficient empirical evidence for. Drawing on some important imaging studies that reveal striking facts about neural responses to visual stimuli, I argue for two intimately related claims: first, that the intuitive plausibility of claims like Carruthers’s is not a guarantee of empirical plausibility; second, that as concerns the same claims, strong empirical evidence is needed before confident judgments of empirical plausibility can reasonably be formulated. (shrink)

Emotion Review, Volume 14, Issue 1, Page 84-95, January 2022. Emotional stimuli such as images, words, or video clips are often used in studies researching emotion. New sets are continuously being published, creating an immense number of available sets and complicating the task for researchers who are looking for suitable stimuli. This paper presents the KAPODI-database of emotional stimuli sets that are freely available or available upon request. Over 45 aspects including over 25 key set characteristics have (...) been extracted and listed for each set. The database facilitates finding of and comparison between individual sets. It currently contains sets published between 1963 and 2020. A searchable online version allows users to select specific set characteristics and to find matching sets accordingly, as well as to add new published sets. (shrink)

Emotion Review, Volume 14, Issue 1, Page 84-95, January 2022. Emotional stimuli such as images, words, or video clips are often used in studies researching emotion. New sets are continuously being published, creating an immense number of available sets and complicating the task for researchers who are looking for suitable stimuli. This paper presents the KAPODI-database of emotional stimuli sets that are freely available or available upon request. Over 45 aspects including over 25 key set characteristics have (...) been extracted and listed for each set. The database facilitates finding of and comparison between individual sets. It currently contains sets published between 1963 and 2020. A searchable online version allows users to select specific set characteristics and to find matching sets accordingly, as well as to add new published sets. (shrink)

BackgroundMethamphetamine addicts can experience severe emotional processing disorders, with abnormal responses to emotional and drug-related stimuli. These aberrant behaviors are one of the key factors leading to relapse. Nevertheless, the characteristics of addicts’ responses to drug-related stimuli and their responses to emotional stimuli remain controversial.Methods52 methamphetamine addicts from China passively viewed three different categories of images: Drug-related; positive emotional; and negative emotional. In the first task, participants completed a 9-point Self-Assessment Manikin (SAM) scale, rating the valence of (...) each image. In the second, they performed a cued-action task while electroencephalography (EEG) data were recorded.ResultDrug-related images were rated negatively, with an average rating of 3.57. However, reaction times to drug-related stimuli were significantly faster than for negative stimuli (p = 0.030), and were indistinguishable from positive stimuli (p > 0.99). Similarly, EPN amplitudes evoked by drug-related images were significantly larger than those evoked by negative stimuli (p 0.99). LPP amplitudes evoked by drug-related stimuli were significantly smaller than those evoked by negative (p < 0.001) and positive stimuli (p = 0.004).ConclusionDespite negative self-assessments of drug-related imagery, MA-addicts reaction times were no slower than positive reactions. Similarly, drug-related and positive imagery EPN amplitudes were indistinguishable. Together, these results suggest increased attentional resources were allocated to the processing of drug-related stimuli and the pathways responsible partially overlap with the those recruited in processing positive emotional imagery in addicts. Moreover, in the late stage of visual processing, MA-addicts showed reduced brain activity in response to drug-related stimuli, suggesting reverse inhibition in response preparation and emotional appraisal. These findings may provide a reference for clinicians treating drug-taking behavior and for the development of new models of rehabilitation therapy. (shrink)

The quality of the animal-human relationship and, consequently, the welfare of animals can be improved by gentle interactions such as stroking and talking. The perception of different stimuli during these interactions likely plays a key role in their emotional experience, but studies are scarce. During experiments, the standardization of verbal stimuli could be increased by using a recording. However, the use of a playback might influence the perception differently than ‘live’ talking, which is closer to on-farm practice. Thus, (...) we compared heifers’ (n = 28) reactions to stroking while an experimenter was talking soothingly (‘live’) or while a recording of the experimenter talking soothingly was played (‘playback’). Each animal was tested three times per condition and each trial comprised three phases: pre-stimulus, stimulus (stroking and talking) and post-stimulus. In both conditions, similar phrases with positive content were spoken calmly, using long low-pitched vowels. All tests were video recorded and analyzed for behaviors associated with different affective states. Effects on the heifers’ cardiac parameters were assessed using analysis of heart rate variability. Independently of the auditory stimuli, longer durations of neck stretching occurred during stroking, supporting our hypothesis of a positive perception of stroking. Observation of ear positions revealed longer durations of the back up position and less ear flicking and changes of ear positions during stroking. The predicted decrease in HR during stroking was not confirmed; instead we found a slightly increased mean HR during stroking with a subsequent decrease in HR, which was stronger after stroking with live talking. In combination with differences in HRV parameters, our findings suggest that live talking might have been more pleasurable to the animals and had a stronger relaxing effect than ‘playback’. The results regarding the effects of the degree of standardization of the stimulus on the variability of the data were inconclusive. We thus conclude that the use of recorded auditory stimuli to promote positive affective states during human-animal interactions in experimental settings is possible, but not necessarily preferable. (shrink)

While art is omnipresent in human history, the neural mechanisms of how we perceive, value and differentiate art has only begun to be explored. Functional magnetic resonance imaging studies suggested that art acts as secondary reward, involving brain activity in the ventral striatum and prefrontal cortices similar to primary rewards such as food. However, potential similarities or unique characteristics of art-related neuroscience remain elusive, also because of a lack of adequate experimental tools: the available collections of art stimuli often (...) lack standard image definitions and normative ratings. Therefore, we here provide a large set of well-characterized, novel art images for use as visual stimuli in psychological and neuroimaging research. The stimuli were created using a deep learning algorithm that applied different styles of popular paintings on ordinary animal, plant and object images which were drawn from established visual stimuli databases. The novel stimuli represent mundane items with artistic properties with proposed reduced dimensionality and complexity compared to paintings. In total, 2,332 novel stimuli are available open access as “art.pics” database at https://osf.io/BTWNQ/ with standard image characteristics that are comparable to other common visual stimuli material in terms of size, variable color distribution, complexity, intensity and valence, measured by image software analysis and by ratings derived from a human experimental validation study [n = 1,296, age 30.2 ± 8.8 y.o.]. The experimental validation study further showed that the art.pics elicit a broad and significantly different variation in subjective value ratings as well as in recognizability, arousal and valence across different art styles and categories. Researchers are encouraged to study the perception, processing and valuation of art images based on the art.pics database which also enables real reward remuneration of the rated stimuli and a direct comparison to other rewards from e.g., food or money.Key Messages: We provide an open access, validated and large set of novel stimuli of standardized art images including normative rating data to be used for experimental research. Reward remuneration in experimental settings can be easily implemented for the art.pics by e.g., handing out the stimuli to the participants, as done in the presented validation task. Experimental validation showed that the art.pics’ images elicit a broad and significantly different variation in subjective value ratings across different art styles and categories, while size, color and complexity characteristics remained comparable to other visual stimuli databases. (shrink)

Human articulated motion can be readily recognized robustly even from impoverished so-called point-light displays. Such sequence information is processed by separate visual processing channels recruiting different stages at low and intermediate levels of the cortical visual processing hierarchy. The different contributions that motion and form information make to form articulated, or biological, motion perception are still under investigation. Here we investigate experimentally whether and how specific spatio-temporal features, such as extrema in the motion energy or maximum limb expansion, indicated by (...) the lateral and longitudinal extension, constrain the formation of the representations of articulated body motion. In order to isolate the relevant stimulus properties we suggest a novel masking technique, which allows to selectively impair the ankle information of the body configuration while keeping the motion of the point-light locations intact. Our results provide evidence that maxima in feature channel representations, e.g., the lateral or longitudinal extension, define elemental features to specify key poses of biological motion patterns. These findings provide support for models which aim at automatically building visual representations for the cortical processing of articulated motion by identifying temporally localized events in a continuous input stream. (shrink)

Starting from macroscopic and microscopic facts of cerebellar histology, we propose a new functional interpretation that may elucidate the role of the cerebellum in movement control. The idea is that the cerebellum is a large collection of individual lines (Eccles's : Eccles et al. 1967a) that respond specifically to certain sequences of events in the input and in turn produce sequences of signals in the output. We believe that the sequence-in/sequence-out mode of operation is as typical for the cerebellar cortex (...) as the transformation of sets into sets of active neurons is typical for the cerebral cortex, and that both the histological differences between the two and their reciprocal functional interactions become understandable in the light of this dichotomy. The response of Purkinje cells to sequences of stimuli in the mossy fiber system was shown experimentally by Heck on surviving slices of rat and guinea pig cerebellum. Sequential activation of a row of eleven stimulating electrodes in the granular layer, imitating a of the stimuli along the folium, produces a powerful volley in the parallel fibers that strongly excites Purkinje cells, as evidenced by intracellular recording. The volley, or has maximal amplitude when the stimulus moves toward the recording site at the speed of conduction in parallel fibers, and much smaller amplitudes for lower or higher The succession of stimuli has no effect when they in the opposite direction. Synchronous activation of the stimulus electrodes also had hardly any effect. We believe that the sequences of mossy fiber activation that normally produce this effect in the intact cerebellum are a combination of motor planning relayed to the cerebellum by the cerebral cortex, and information about ongoing movement, reaching the cerebellum from the spinal cord. The output elicited by the specific sequence to which a is tuned may well be a succession of well timed inhibitory volleys the motor sequences so as to adapt them to the complicated requirements of the physics of a multijointed system. (shrink)

The Stroop effect is a well-documented phenomenon, demonstrating both interference and facilitation effects. Many versions of the Stroop task were created, according to the purposes of its applications, varying in numerous aspects. While many versions are developed to investigate the mechanisms of the effect itself, the Stroop effect is also considered a general measure of attention, inhibitory control, and executive functions. In this paper, we implement “eStroop”: a new digital version based on verbal responses, measuring the main processes involved in (...) the traditional effect. eStroop features four categories of stimuli in four different colors: geometrical shapes, neutral words, congruent words, and incongruent words. The results of the administration to 307 University students confirm the Stroop effect and offer baseline data for future research and clinical testing. Direct comparisons with other recent versions of the task are discussed, offering insights into differences and similarities between different task variables. (shrink)

"Dishonesty inspires more euphemisms than copulation or defecation. This helps desensitize us to its implications. In the post-truth era we don't just have truth and lies but a third category of ambiguous statements that are not exactly the truth but fall just short of a lie. Enhanced truth it might be called. Neo-truth . Soft truth . Faux truth . Truth lite ." Deception has become the modern way of life. Where once the boundary line between truth and lies was (...) clear and distinct, it is no longer so. In the post-truth era, deceiving others has become a challenge, a game, a habit. High-profile dissemblers compete for news coverage, from journalists like Jayson Blair and professors like Joseph Ellis to politicians (of all stripes), executives, and "creative" accountants. Research suggests that the average American tells multiple lies on a daily basis, often for no good reason. Not a finger-wagging scolding, The Post-Truth Era is a combination of Ralph Keyes's investigative journalism and solid science. The result is a spirited exploration of why we lie about practically everything and the consequences such casual dishonesty has on society. American society has become permeated from top to bottom by deception. Its consequences for the nature of public discourse, media, business, literature, academia, and politics are profound. With dry humor, passionate fervor, and deep understanding, Ralph Keyes takes us on a tour of a world where truth and honesty are no longer absolutes but mutable, fluid concepts. (shrink)

Aquinas, Aristotle, and the Promise of the Common Good, first published in 2006, claims that contemporary theory and practice have much to gain from engaging Aquinas's normative concept of the common good and his way of reconciling religion, philosophy, and politics. Examining the relationship between personal and common goods, and the relation of virtue and law to both, Mary M. Keys shows why Aquinas should be read in addition to Aristotle on these perennial questions. She focuses on Aquinas's Commentaries as (...) mediating statements between Aristotle's Nicomachean Ethics and Politics and Aquinas's own Summa Theologiae, showing how this serves as the missing link for grasping Aquinas's understanding of Aristotle's thought. Keys argues provocatively that Aquinas's Christian faith opens up new panoramas and possibilities for philosophical inquiry and insights into ethics and politics. Her book shows how religious faith can assist sound philosophical inquiry into the foundation and proper purposes of society and politics. (shrink)

While feminist critiques of AI are increasingly common in the scholarly literature, they are by no means new. Alison Adam’s Artificial Knowing (1998) brought a feminist social and epistemological stance to the analysis of AI, critiquing the symbolic AI systems of her day and proposing constructive alternatives. In this paper, we seek to revisit and renew Adam’s arguments and methodology, exploring their resonances with current feminist concerns and their relevance to contemporary machine learning. Like Adam, we ask how new AI (...) methods could be adapted for feminist purposes and what role new technologies might play in addressing concerns raised by feminist epistemologists and theorists about algorithmic systems. In particular, we highlight distributed and federated learning as providing partial solutions to the power-oriented concerns that have stymied efforts to make machine learning systems more representative and pluralist. (shrink)

Brain Mystery Light and Dark examines scientific models of how the brain becomes conscious and argues that the spiritual dimension of life is compatible with the main scientific theories. Keyes shows us that the belief in the unity of mind and brain does not necessarily undermine aesthetic, religious, and ethical beliefs.

_Brain Mystery Light and Dark_ examines scientific models of how the brain becomes conscious and argues that the spiritual dimension of life is compatible with the main scientific theories. Keyes shows us that the belief in the unity of mind and brain does not necessarily undermine aesthetic, religious, and ethical beliefs.

Since the 1930s, scientists studying the neurological disease scrapie had assumed that the infectious agent was a virus. By the mid 1960s, however, several unconventional properties had arisen that were difficult to reconcile with the standard viral model. Evidence for nucleic acid within the pathogen was lacking, and some researchers considered the possibility that the infectious agent consisted solely of protein. In 1982, Stanley Prusiner coined the term `prion' to emphasize the agent's proteinaceous nature. This infectious protein hypothesis was denounced (...) by many scientists as `heretical'.This two-part essay asks why the concept of an infectious protein was considered controversial. Some biologists justified their evaluation of this hypothesis on the grounds that an infectious protein contradicted the `central dogma of molecular biology'. Others referred to vague theoretical constraints such as molecular biology's `theoretical structure' or `framework'. Examination of the objections raised by researchers reveals exactly what generalizations were being challenged by a protein model of infection.This two-part survey of scrapie and prion research reaches several conclusions: A theoretical framework is present in molecular biology, exerting its influence in hypothesis formation and evaluation; This framework consists of several related, yet separable, generalizations or `elements', including Francis Crick's Central Dogma and Sequence Hypothesis, plus notions concerning infection, replication, protein synthesis, and protein folding; The term `central dogma' has stretched beyond Crick's original 1958 definition to encompass at least two other `framework elements': replication and protein synthesis; and From the study of scrapie and related diseases, biological information has been delineated into at least two classes: sequential and what I call `conformational'.In Part I of this essay, a brief review of the central dogma was given, and the developments in scrapie research from 1965 to 1972 were traced. This section summarized many of the puzzling, non-virus-like properties of the scrapie agent. Alternative hypotheses to the viral explanation were presented, including early versions of a protein-only hypothesis. Part II of this essay will follow the developments in scrapie and prion research from the mid-1970s through 1991. The growing prominence of a protein-only model of infection will be countered by continued objections from many researchers to a pathogen devoid of nucleic acid. These objections will help illuminate those generalizations in molecular biology that were indeed challenged by a protein-only model of infection. (shrink)

This article revisits the account of magnanimity offered by Thomas Aquinas, in his Commentary on the Nicomachean Ethics of Aristotle and especially in his Summa Theologiae. Recent scholarship has viewed Aquinas' magnanimity as essentially Aristotle's, complemented by the addition of charity and humility to the classical moral horizon. By contrast, I read Aquinas as offering a subtle yet far-reaching critique of important aspects of Aristotelian magnanimity, a critique with roots in Aquinas' theology, yet also comprising a significant philosophic reappraisal of (...) Aristotle's account of human excellence. Against contentions that Aquinas' ethical revisionism is antithetical to civic common sense, the requirements of statesmanship, and the rational foundations of social science, I argue that Aquinas' theory is politically salutary and theoretically enlightening. Moreover, I suggest that recent dissident reflection on twentieth-century totalitarian experience underscores both the humanity and the nobility of a humility-informed magnanimity, such as that advocated by Thomas Aquinas. (shrink)

This study investigated the differences in morphometry and functional plasticity characteristics of the brain after long-term training of different intensities. Results showed that an aerobic group demonstrated higher gray matter volume in the cerebellum and temporal lobe, while an anaerobic group demonstrated higher gray matter volume in the region of basal ganglia. In addition, the aerobic group also showed significantly higher fractional amplitude of low-frequency fluctuation and degree centrality in the motor area of the frontal lobe and parietal lobe, and (...) the frontal gyrus, respectively. At the same time, the anaerobic group demonstrated higher fALFF and DC in the cerebellum posterior lobe. These findings may further prove that different brain activation modes respond to different intensities of physical activity and may help to reveal the neural mechanisms that can classify athletes from different intensity sports. (shrink)

Auxin, a class of plant hormones which affects a wide array of growth and developmental processes including cell elongation and cell division, alters gene expression in a very rapid, selective, and dramatic way. The relative level of some mRNAs decreases several fold, while that of other mRNAs increases many fold. These changes are mediated, at least in some cases, by very fast (within 5–10 min) modulation by auxin of transcription as measured by run‐off transcription assays using nuclei isolated from control (...) and auxin‐treated tissues. Rapid turnover of mRNAs following auxin treatment also contributes to large changes in steady state concentration in some cases. The data are suggestive of multiple and complex mechanisms of regulation of expression of those genes which have been studied, using cloned cDNAs for direct quantitation of mRNA steady state levels and relative transcription rates. While there is no definitive evidence that auxin‐regulated gene expression mediates any of the growth responses effected by auxin, several lines of evidence are supportive of a very close relationship between these processes. The working hypothesis is that there is a causal relationship between the effects of auxin on gene expression and at least some of the physiological and growth responses to auxin. (shrink)

As a type of Chinese folk art, jianzhi paper carving expresses not only people's spiritual life, but also their aspirations for a better life. Chinese paper carving art is filled with simple life wisdom and good wishes, and the figurative symbols contain unique artistic value and national traits. However, in today's multifaceted development, the traditional art of paper carving with a thousand years of history is gradually fading away. Traditional folk art represented by paper cutting has also begun to be (...) introduced into new fields, not only in graphic design, but also in installation design of public spaces, showing its rich expressiveness and deep artistic value. This paper will examine the characteristics of traditional national paper carving, highlight cultural differences between Eastern and Western paper carving art, combine traditional folk art of paper carving with modern artistic expressions, analyse symbolic and emotional imagery and explore new ideas for the development and innovation of Chinese national art. (shrink)

Brain Mystique Light and Dark bridges the gap between neuroscience, brain evolution and consciousness by examining scientific models of how the brain becomes conscious. The book argues that the spiritual dimension of life is compatible with scientific naturalism. Not bound by conventional stereotypes, Charles Don Keyes safeguards the unity of brain/mind, synthesized from a wide range of sources, reinterprets the triune brain concept and self-reference models of consciousness.

Discusses the pertinence of philosophical Taoism to psychological research by examining the Taoist ideas about conflict resolution in human interaction. According to Taoism, the ultimate goals of people consist of realizing harmony with one another and achieving consonance with nature. People can attain interpersonal harmony by understanding the significance of Tao and how human behavior is regulated by the interaction of 3 systems at the universal, interpersonal, and intrapersonal levels. 2012 APA, all rights reserved).

In the Arabic eleventh century, scholars were intensely preoccupied with the way that language generated truth and beauty. Their work in poetics, logic, theology, and lexicography defined the intellectual space between God and the poets. In Language Between God and the Poets, Alexander Key argues that ar-Raghib al-Isfahani, Ibn Furak, Ibn Sina (Avicenna), and Abd al-Qahir al-Jurjani shared a conceptual vocabulary based around the words ma'na and haqiqah. They used this vocabulary to build theories of language, mind, and reality that (...) answered perennial questions: how to structure language and reference, how to describe God, how to construct logical arguments, and how to explain poetic affect."--Provided by publisher. (shrink)

This book is the first to interpret and reflect on Augustine's seminal argument concerning humility and pride, especially in politics and philosophy, in The City of God. Mary Keys shows how contemporary readers have much to gain from engaging Augustine's lengthy argument on behalf of virtuous humility. She also demonstrates how a deeper understanding of the classical and Christian philosophical-rhetorical modes of discourse in The City of God enables readers to appreciate and evaluate Augustine's nuanced case for humility in politics, (...) philosophy, and religion. Comprised of a series of interpretive essays and commentaries following Augustine's own order of segments and themes in The City of God, Keys' volume unpacks the author's complex text and elucidates its challenge, meaning, and importance for contemporary readers. It also illuminates a central, yet easily underestimated theme with perennial relevance in a classic work of political thought and religion. (shrink)

In recent years, there has been a growing interest in the geographies of electronic waste (e-waste). Several studies have examined how e-waste is increasingly exported to processing sites in China, India, Pakistan, Ghana and elsewhere across the global south, where it leads to devastating health effects. Through an interdisciplinary patchwork of human geography, public health, narrative theory, and philosophies of memory, this paper seeks to show how the export of e-waste to the global south—and the toxins it brings along with (...) it—is part of what makes “resilient” urban growth and citizenship possible elsewhere, particularly in the San Francisco Bay Area. The surplus value of technological production is only recuperable, in places like Silicon Valley, if its toxicity is spatially and temporally displaced onto— and hidden within— surplus bodies who are cast into necropolitical terrains of ill- health and danger. Tracing this story of e-waste, which spans from the epigenetic to the geopolitical, from the San Francisco Bay Area to China’s Greater Bay Area, requires a method of empirical allegory that can detect global iniquities on the most granular of scales, and vice versa. (shrink)

The relation between moral philosophy and moral practice is itself philosophically controversial. nor is there any one determinate formula through which to express the relations between the basic principles of morality and of rationality itself. the concepts of the moral and the political are both 'essentially contestable' and so too is the nature of their relations; that is, their analysis is itself of moral and political import. nevertheless, in periods of overall stability, this contestability may hardly be apparent. all this, (...) and its connection with philosophy's fundamental commitment to questioning and self-awareness has a deep significance for moral (and political) education. (shrink)

Neuroscientific evidence requires a monistic understanding of brain/mind. Truly appropriating what this means confronts us with the vulnerability of the human condition. Ca‐muss absurd and Tillich's despair are extreme expressions of a similar confrontation. This crisis demands a type of courage that is consistent with scientific truth and does not undermine the spiritual dimension of life. That dimension is not a separate substance but the process by which brain/mind meaningfully wrestles with its crisis through aesthetic symbols, religious faith, and ethical (...) affirmation. The validity of these activities does not depend upon human autonomy but instead upon the fact that they exist. Furthermore, they constitute the self, which Dennett calls a “center of narrative gravity.”. (shrink)