We study the logic of strategic ability of coalitions of agents with bounded memory by introducing Alternating-time Temporal Logic with Bounded Memory (ATLBM), a variant of Alternating-time Temporal Logic (ATL). ATLBM accounts for two main consequences of the assumption that agents have bounded memory. First, an agent can only remember a strategy that specifies actions in a bounded number of different circumstances. While the ATL-formula means that coalition C has a joint strategy which will make φ true forever, the ATLBM-formula (...) means that C has a joint strategy which for each agent in C specifies what to do in no more than n different circumstances and which will make φ true forever. Second, an agent has bounded recall—a strategy can only take the last m states of the system into account. We use the logic to study the interaction between strategic ability, bounded number of decisions, bounded recall and incomplete information. We discuss the logical properties and expressiveness of ATLBM, and its relationship to ATL. We show that ATLBM can express properties of strategic ability under bounded memory which cannot be expressed in ATL. (shrink)

This paper is partly a tribute to Richard Jeffrey, partly a reflection on some of his writings, The Logic of Decision in particular. I begin with a brief biography and some fond reminiscences of Dick. I turn to some of the key tenets of his version of Bayesianism. All of these tenets are deployed in my discussion of his response to the St. Petersburg paradox, a notorious problem for decision theory that involves a game of infinite expectation. Prompted by that (...) paradox, I conclude with some suggestions of avenues for future research. (shrink)

Based on brain state-dependent behavioral changes, consolidation of sensorimotor memories has been posited to evolve in two different functional stages. Only the second of these stages requires sleep and leads to performance benefits. Recent results, however, suggest that sleep is not always crucial for the expression of delayed behavioral gains but might be critical for enhancing automaticity in the absence of attention, another expression of memory consolidation.

In his recent (2005) book "Sweet Dreams: philosophical obstacles to a science of consciousness," Dennett renews his attack on a philosophical notion of qualia, the success of which attack is required if his brand of Functionalism is to survive. He also articulates once again what he takes to be essential to his notion of consciousness. I shall argue that his new, central argument against the philosophical concept of qualia fails. In passing I point out a difficulty that David (...) Rosenthal's "higher-order thought" theory of consciousness also faces in accounting for qualia. I then contrast Dennett's newest account of consciousness with interestingly different conceptions by contemporary neuro-scientists, and I suggest that philosophers should take the recent suggestions by neuro-scientists more seriously as a subject for philosophical investigation. (shrink)

This paper is just a comment to the impressive work by A. C. Ehresmann and J.-P. Vanbremeersch on the theory of Memory Evolutive Systems (MES). MES are truly higher order systems. Hyperstructures represent a new concept which I introduced in order to capture the essence of what a higher order structure is—encompassing hierarchies and emergence. Hyperstructures are motivated by cobordism theory in topology and higher category theory. The morphism concept is replaced by the concept of a bond. In the paper (...) I briefly introduce hyperstructures motivated geometrically and suggest further developments of the MESs along these lines, which could widen up new areas of applications. (shrink)

Extreme conditions like savantism, autism or synaesthesia, which have a neurological 2AH, UK basis, challenge the idea that other minds are similar to our own. In this paper we report a single case study of a man in whom all three of these conditions co-occur. We suggest, on the basis of this single case, that when savantism and synaesthesia co- occur, it is worthwhile testing for an undiagnosed Autism Spectrum Condition (ASC). This is because savantism has an established association with (...) ASC, and the combination of ASC with synaesthesia may increase the likelihood of savantism. The implications of these conditions for philosophy of mind are introduced. (shrink)

Johnson-Laird's mental models theory claims that reasoning is a semantic process of construction and manipulation of models in working memory of limited capacity. Accordingly, both a deduction and a given interpretation of a premise would be all the harder the higher the number of models they require. The purpose of the present experiment was twofold. First, it aimed to demonstrate that the interpretation of if...then conditional sentences in children (third, sixth, and ninth graders) evolves as a function of the number (...) of models the children can produce. We proposed a theory of conditional reasoning development that hypothesises a developmental trend of three successive levels of interpretations underlain by one, two, and then three models, i.e. conjunctive, biconditional, and conditional respectively. Second, we aimed to show that these different levels correlate with working memory capacities: the higher the working memory span, the higher the number of models underlying the conditional interpretation. These two hypotheses were verified, supporting the mental models theory. The results are compared with the rival theory of mental logic. (shrink)

From its genesis in the 1960s, the focus of inquiry in neuroscience has been on the cellular and molecular processes underlying neural activity. In this pursuit neuroscience has been enormously successful. Like any successful scientific inquiry, initial successes have raised new questions that inspire ongoing research. While there is still much that is not known about the molecular processes in brains, a great deal of very important knowledge has been secured, especially in the last 50 years. It has also attracted (...) the attention of a number of philosophers, some of whom have viewed it as evidence for a ruthlessly reductionistic program that will eventually explain how mental processes are performed in the brain in purely molecular terms. As neuroscience developed, however, there emerged a smaller group of researchers who focused on systems, behavioral, and cognitive neuroscience. These investigators have also made impressive advances in the last 50 years and they have been the focus of an even larger group of philosophers, who have appealed to systems level understanding of the brain as providing the appropriate point of connection to the information processing accounts advanced in psychology. (shrink)

This article is the English-language pre-print version of the chapter published in "Hitlers Sklaven" (in German). The volume "Hitlers Sklaven" (2008) is a result of a massive international oral history project aimed to study forced and slave labour for the Nazi regime during World War II. Within this volume, our article focuses specifically on the experiences of Russian women - former slave labourers. Biographical interviews with these now elderly women were carried out in 2005 in Pskov. The Russian region of (...) Pskov borders on Latvia, Estonia and Byelorussia, and was occupied by the Germans from July, 1941 to July, 1944. This resulted, in particular, in approximately 150,000 people deported from Pskov region only (out of the estimated 3 mln people deported from the USSR as a whole).The article distinguishes between several categories of interviewees: women - civilians, deported to forced works from occupied territories; women subjected to the draft, who were then taken prisoners and forced to work; and finally, women who worked in occupation. The work could be in industry, construction, or agriculture. Girls often baby-sat for babies and younger children in a camp or at a farm. Themes of pre-war childhood memories, childhood labour, love during the war are also featured in the article.The article highlights the gender-specific nature of war memories. It is revealed in the way of constructing a biographical story around the souvenirs of feelings, rather than of particular events, and also constructing different gendered identities through such a story.The article also outlines the strategies of the respondents' adaptation to post-war life in the Soviet Union, where the interviewees were often repressed or stigmatised. Such biographical strategies include normalisation, compensation and hyper-compensation, and anonymisation. Besides, the article tells about narrative strategies of coping with a trauma, such as fragmentation (having gaps in the life story) and emotional detachment. These findings and the oral history material featured in the article are especially important in the context of Russia where public discourse was dominated, until recently, by the silence about people deported to Germany, and this didn't allow them to fully overcome their traumatic experiences. (shrink)

Spacetime memory is defined with a holonomic approach to information processing, where multi-state stability is introduced by a non-linear phase-locked loop. Geometric phases serve as the carrier of physical information and geometric memory (of orientation) given by a path integral measure of curvature that is periodically refreshed. Regarding the resulting spin-orbit coupling and gauge field, the geometric nature of spacetime memory suggests to assign intrinsic computational properties to the electromagnetic field.

Much of our work with enriched experience and training in animals supports the Quartz & Sejnowski (Q&S) thesis that environmental information can interact with pre-existing neural structures to produce new synapses and neural structure. However, substantial data as well as an evolutionary perspective indicate that multiple information-capture systems exist: some are constructivist, some are selectionist, and some may be tightly constrained.

Based on a new critical edition of Aristotle's "De Memoria" and two interpretive essays, this book challenges current views on Aristotle's theories of memory ...

∗I am grateful to two anonymous referees for helpful and constructive comments. A first version of this paper was presented at the fifth conference on Logic and the Foundations of Game and Decision Theory (LOFT5), Torino, June 2002.

An information completion of an extensive game is obtained by extending the information partition of every player from the set of her decision nodes to the set of all nodes. The extended partition satisfies Memory of Past Knowledge (MPK) if at any node a player remembers what she knew at earlier nodes. It is shown that MPK can be satisfied in a game if and only if the game is von Neumann (vN) and satisfies memory at decision nodes (the restriction (...) of MPK to a player's own decision nodes). A game is vN if any two decision nodes that belong to the same information set of a player have the same number of predecessors. By providing an axiom for MPK we also obtain a syntactic characterization of the said class of vN games. (shrink)

The problem of cortical integration is described and various proposed solutions, including grandmother cells, cell assemblies, feed-forward structures, RAAM and synchronization, are reviewed. One method, involving complex attractors, that has received little attention in the literature, is explained and developed. I call this binding through annexation. A simulation study is then presented which suggests ways in which complex attractors could underlie our capacity to reason. The paper ends with a discussion of the efficiency and biological plausibility of the proposals as (...) integration mechanisms for different regions and functions of the brain. (shrink)

In the hopes of directing students to the great philosophic texts through the entertainment fare they consume, this article analyzes the philosophic significance of Memento, a 2000 film directed by Christopher Nolan. We understand the film as a thought experiment in which memory capacity is partially removed from the main character, Leonard Shelby. The experiment is run with Leonard's thoughts and behavior according with Hume's epistemology and cognitive psychology. As a result, Memento ends up illustrating Hume's positions on personal identity, (...) the character of justice, and the intellectual limitations of the human mind. (shrink)

This is a review of the book ‘Memory Evolutive Systems; Hierarchy, Emergence, Cognition’, by A. Ehresmann and J.P. Vanbremeersch. I welcome the use of category theory and the notion of colimit as a way of describing how complex hierarchical systems can be organised, and the notion of categories varying with time to give a notion of an evolving system. In this review I also point out the relation of the notion of colimit to ideas of communication; the necessity of communications (...) to be symbolic representations; and the use of an analogy with mathematics to spell out some of the necessities of such a mode of communication to be powerful, robust and efficient. (shrink)

Bishop Butler objected to Locke's theory of personal identity on the grounds that memory presupposes personal identity. Most of those sympathetic with Locke's account have accepted Butler's criticism, and have sought to devise a theory of personal identity in the spirit of Locke's that avoids Butler's circularity objection. John McDowell has argued that even the more recent accounts of personal identity are vulnerable to the kind of objection Butler raised against Locke's own account. I criticize McDowell's stance, drawing on a (...) distinction introduced by Annalisa Coliva between two types of immunity to error through misidentification. (shrink)

The effort to identify the neural substrate of episodic recall, though ambitious, lacks experimental support. By considering the data on c-fos activation by novel and familiar stimuli in recognition studies, we illustrate how inadequate experimental designs permit alternative interpretations. We stress that interpretation of c-fos expression changes should be supported by adequate recognition tests.

Blair proposes that fluid intelligence, working memory, and executive function form a unitary construct: fluid cognition. Recently, our group has utilized a combined correlational–experimental cognitive neuroscience approach, which we argue is beneficial for investigating relationships among these individual differences in terms of neural mechanisms underlying them. Our data do not completely support Blair's strong position. (Published Online April 5 2006).

The reconstructive turn in memory theory challenges us to provide an account of successful remembering that is attentive to the ways in which we use memory, both individually and socially. I investigate conceptualizations of accuracy and integrity useful to memory theorists and argue that faithful recollection is often a complex epistemological/ethical achievement.

Emotions and consciousness are intimately linked and often conceived from a purely intrapersonal perspective. This paper explores the implications of considering emotions as not only intrapersonal but also as interpersonal and transpersonal heterarchical (i.e., every component has potentially equal importance) systems. It is telling that in contemplative traditions and contemporary research on hypnotic experience, deep 'inner' experience is pregnant with interpersonal and transpersonal meanings. Similarly, the propensity to have porous conscious experiences is paralleled by the tendency to be affected by (...) the emotion of others. Anecdotal and experimental evidence on anomalous events clearly suggests that strong emotions can have non-local effects. That consciousness and emotions are embedded within interpersonal and transpersonal fields has important epistemological and ethical implications. (shrink)

Some self-proclaimed skeptics of recovered memory claim that traumatic childhood events simply cannot be forgotten at the time only to be remembered later in life. This claim has been made repeatedly by the Advisory Board members of a prominent advocacy group for parents accused of sexual abuse, the so-called False Memory Syndrome Foundation. The research project described in this article identifies and documents the growing number of cases that have been ignored or distorted by such skeptics. To date, this project (...) has documented 35 cases in which recovered memories of traumatic childhood events were corroborated by clear and convincing evidence. This article concludes with some observations about the politics of the false memory movement, particularly the tendency to conceal or omit evidence of corroboration. Several instances of this vanishing facts syndrome are documented and analyzed. (shrink)

The craft of librarianship should inform the law governing the acquisition, preservation, and transmission of knowledge. Drawing upon T.S. Eliot's works of literary criticism, part I of this article describes the contradictory role of cultural memory in a society saturated with new information. Even as the accumulation of information in a technologically explosive society heightens the value of the most prominent cultural landmarks, each distinct cultural expression commands an ever-diminishing amount of attention. Parts II and III turn from literary theory (...) to legal doctrine. After reviewing the Supreme Court's cases on library management, part II endorses two basic principles within the law of librarianship as a branch of First Amendment jurisprudence. First, decisions to acquire material should lie beyond judicial challenge. Second, legislative mandates to exclude material should draw strict scrutiny and should be presumed unconstitutional. Part III concludes that uncertainty within the Supreme Court's jurisprudence on librarianship should be resolved in favor of more liberal access to information. (shrink)

A number of philosophers, from Thomas Reid1 through C. A. J. Coady2, have argued that one is justified in relying on the testimony of others, and furthermore, that this should be taken as a basic epistemic presumption. If such a general presumption were not ultimately dependent on evidence for the reliability of other people, the ground for this presumption would be a priori. Such a presumption would then have a status like that which Roderick Chisholm claims for the epistemic principle (...) that we are justified in believing what our senses tell us. (shrink)

This volume began as a remembrance of Alonzo Church while he was still with us and is now finally complete. It contains papers by many well-known scholars, most of whom have been directly influenced by Church's own work. Often the emphasis is on foundational issues in logic, mathematics, computation, and philosophy - as was the case with Church's contributions, now universally recognized as having been of profound fundamental significance in those areas. The volume will be of interest to logicians, computer (...) scientists, philosophers, and linguists. The contributions concern classical first-order logic, higher-order logic, non-classical theories of implication, set theories with universal sets, the logical and semantical paradoxes, the lambda-calculus, especially as it is used in computation, philosophical issues about meaning and ontology in the abstract sciences and in natural language, and much else. The material will be accessible to specialists in these areas and to advanced graduate students in the respective fields. (shrink)

In a laudable effort to move beyond simplistic "All-or-Nothing" views on the role of sleep in memory consolidation, Walker proposes that memory traces acquired during a learning episode further undergo at least two distinct sorts of modifications after practice has ended (that is, "off-line"): Consolidation-based stabilization (CBS) and consolidation-based enhancement (CBE). The first set of processes would be dependent on wakefulness, while the second would be dependent on sleep. While we certainly agree with the author that previous characterizations of the (...) role of sleep during memory formation has tended to focus on simplistic distinctions, it also appears to us that Walker's own proposal, in which a sharp distinction is made between wake-dependent CBS and sleep-dependent CBE, falls into the same trap. (shrink)

Whitehead does not provide us with a systematic account of the various types of experience to which the word “memory” is applied. Nevertheless, he does provide us with a way of understanding the world, and living creatures who inhabit it, that places the discussion in a different context from the usual one: the diverse features of human experience that we call memory are developed forms of basic patterns of relationship that characterize all actual entities. I will first review the relevant (...) features of Whitehead's conceptuality, then contrast the resulting view with its usual formulation, and then speculate about some forms of memory in Whiteheadian categories. (shrink)

Introduction: Transforming Thought John McCumber The Story of Things According to an ancient story which (because of Hegel and Heidegger) we are now able to ...

In this volume some of today's most influential thinkers face the question of philosophy's future and find an answer in its past.

We are sympathetic to most of what Glenberg says in his target article, but we consider it common wisdom rather than something radically new. Others have argued persuasively against the idea of abstraction in cognition, for example. On the other hand, Hebbian connectionism cannot get along without the idea of association, at least at the neural level.

The imagination opens onto a reconciliation of the past with the future, especially when it is activated as a retrieval of the memories of collective suffering. This is especially the case with the Latin American experience, with its history of military governments and their 'dirty wars' against their civilians. Using Ricoeur's notion of the metaphorical imagination, and drawing on Dussel's work on ethical hermeneutics, this paper argues that, in the act of remembering, other social imaginaries can be created as possibilities (...) that go beyond the concrete present, and which occur from the vantage points of oppressed others. (shrink)

Whoever paid the bill at the restaurant last night, will clearly remember doing it. Independently from the type of action, it is a common experience that being the agent provides a special strength to our memories. Even if it is generally agreed that personal memories (episodic memory) rely on separate neural substrates with respect to general knowledge (semantic memory), little is known on the nature of the link between memory and the sense of agency. In the present paper, we review (...) results from two experiments investigating the effects of agency on both explicit and implicit memory traces. Performance of normal subjects is compared to that of schizophrenic patients in order to explore the role of awareness of action on memory. It is proposed that reliable first-person information is necessary to create a stable and coherent motor memory trace. (shrink)

INTRODUCTION SECTION I In the last 20 years or so philosophers in the analytic tradition have taken an increasing interest in causal theories of a wide ...

In Interpretations and Causes, some of the leading contemporary analytic philosophers discuss Davidson's new ideas in a lively, relevant, useful, and not always ...

The present study is part of recent attempts to specify the characteristics of the counterexample retrieval process during causal conditional reasoning. The study tried to pinpoint whether the retrieval of stored counterexamples (alternative causes and disabling conditions) for a causal conditional is completely automatic in nature or whether the search process also demands executive working memory (WM) resources. In Experiment 1, participants were presented with a counterexample generation task and a measure of WM capacity. We found a positive relation between (...) search efficiency, as measured by the number of generated counterexamples in limited time, and WM capacity. Experiment 2 examined the effects of a secondary WM load on the retrieval performance. As predicted, burdening WM with an attention-demanding secondary task decreased the retrieval efficiency. Both low and high spans were affected by the WM load but load effects were less pronounced for the most strongly associated counterexamples. Findings established that in addition to an automatic search component, the counterexample retrieval draws on WM resources. (shrink)

Two experiments examined the contribution of working memory (WM) to the retrieval and inhibition of background knowledge about counterexamples (alternatives and disablers, Cummins, 1995) during conditional reasoning. Experiment 1 presented a conditional reasoning task with everyday, causal conditionals to a group of people with high and low WM spans. High spans rejected the logically invalid AC and DA inferences to a greater extent than low spans, whereas low spans accepted the logically valid MP and MT inferences less frequently than high (...) spans. In Experiment 2, an executive-attention-demanding secondary task was imposed during the reasoning task. Findings corroborate that WM resources are used for retrieval of stored counterexamples and that people with high WM spans will use WM resources to inhibit the counterexample activation when the type of counterexample conflicts with the logical validity of the reasoning problem. (shrink)

(1) Non-projectable properties as opposed to the clamping of projectable properties play a primary role in triggering and guiding human action. (2) Embodiment in language-mediated memories should be qualified: (a) Language imposes a radical discretization on body constraints (second-order embodiment). (b) Metaphors rely on second-order embodiment. (c) Language users sometimes suspend embodiment.

The following paper considers one important feature of our experiential or ‘recollective’ memories, namely their spatial perspectival characteristics. I begin by considering the ‘Past-Dependency-Claim’, which states that every recollective memory (or ‘R-memory’) has its spatial perspectival characteristics in virtue of the subject’s present awareness of the spatial perspectival characteristics of a relevant past perceptual experience. Although the Past-Dependency-Claim might for various reasons seem particularly attractive, I show that it is false. I then proceed to develop and defend the ‘Present-Dependency-Claim’, namely (...) the claim that the spatial perspectival characteristics of an R-memory depend on the spatial perspectival characteristics of perceptual experiences that the subject has at the time at which the R-memory occurs. Lastly, I discuss the phenomenon of so-called ‘observer-memories’, which presents a special challenge for any attempt to account for the spatial perspectival characteristics of R-memories. I argue that we have no good reason to deny that the relevant experiences should count as memories, and I show that we can account for the spatial perspectival characteristics of observer-memories with the help of the ‘Present-Dependency-Claim’. More generally, the paper shows that certain events that occur in a subject’s mental life (namely, a subject’s R-memories) are necessarily dependent on other events that occur in the relevant subject’s mental life (namely, on certain perceptual experiences). This more general conclusion in turn should be relevant for any attempt to develop an appropriate account of a subject’s mental life as a whole. (shrink)

Daniel C. Dennett

Is Perception the 'Leading Edge' of Memory?

Consciousness appears to us to consist of a sequence of contentful items, arranged in a sequence, the so-called "stream of consciousness," in which each item in turn bursts quite suddenly into consciousness and thereby enters memory, perhaps only briefly to be remembered, and then forgotten. I think that hidden in this comfortable and largely innocent picture of consciousness is a deep and seductive mistake. I intend to expose and (...) elucidate that mistake, and describe an alternative vision. (shrink)

Following Karni's seminal work, Walker and other researchers have recently provided gradually convincing evidence that sleep is critical for the consolidation-based enhancement (CBE) of motor sequence learning. Studies in our laboratory using a motor adaptation paradigm, however, show that CBE can also occur after the simple passage of time, suggesting that sleep effects on memory consolidation are task-related, and possibly dependent on anatomically dissociable circuits.

This article focuses on the politics of memory and forgetting after Auschwitz and apartheid. In the first two sections Habermas' critical contribution to the German Historikerstreit is discussed. Important in this regard is the moral dimension of our relation to the past. In the next two sections the emphasis shifts to South Africa and more specifically the work of the Truth and Reconciliation Commission (TRC). The article ends with a general discussion of the dilemma of historical 'truth' and representation in (...) contemporary societies. Key Words: apartheid • Habermas • Historikerstreit • history • South Africa. (shrink)

In previous research, Toms, Morris, and Ward (1993) have shown that conditional reasoning is impaired by a concurrent task calling on executive functions but not by concurrent tasks that load on the slave systems of the working memory system as conceptualised by Baddeley and Hitch (1974). The present article replicates and extends this previous work by studying problems based on spatial as well as nonspatial relations. In the study 42 participants solved 16 types of spatial or nonspatial problems, both in (...) a single-task condition and under concurrent matrix tapping, a task loading the visuo-spatial sketch pad. The findings were consistent with those of Toms et al. (1993) for problems with a nonspatial content. However, when the content was spatial, and only then, a dual-task impairment was observed: processing time of the first premise was lengthened, especially for problems with negations in the antecedent term, the consequent term, or both; moreover, the number of correctly solved problems with negations in both terms was smaller. The implications of these findings for the mental models theory and the mental logic theory are discussed. (shrink)