Matthew Walker's model overcomes the unrefined classical concept of consolidation as a unitary process. Presently still confined in its scope to selective data mainly referring to procedural motor learning, the model nonetheless provides a valuable starting point for further refinements, which would be required for a more comprehensive account of different types and aspects of human memory consolidation.

There are obvious flaws in REM sleep suppression paradigms that do not allow any conclusion to be drawn either pro or contra the REM sleep-memory hypothesis. However, less intrusive investigations of REM sleep suggest that this sleep stage or its adjunct neuroendocrine characteristics exert a facilitating influence on certain aspects of ongoing memory formation during sleep. [Nielsen; Vertes & Eastman].

Sleep strengthens memories by repeatedly reactivating associated neuron ensembles. Our studies show that although long-term memory for a medium number of word-pairs benefits from sleep, a large number does not. This suggests an upper limit to the amount of information that has access to sleep-dependent declarative memory consolidation, which is possibly linked to the availability of reactivation opportunities. Due to competing processes of global forgetting that are active during sleep, we hypothesized that even larger amounts of information would enhance the (...) proportion of information that is actively forgotten during sleep. In the present study, we aimed to induce such forgetting by challenging the sleeping brain with vast amounts of to be remembered information. For this, 78 participants learned a very large number of 640 word-pairs interspersed with periods of quiet awake rest over the course of an entire day and then either slept or stayed awake during the night. Recall was tested after another night of regular sleep. Results revealed comparable retention rates between the sleep and wake groups. Although this null-effect can be reconciled with the concept of limited capacities available for sleep-dependent consolidation, it contradicts our hypothesis that sleep would increase forgetting compared to the wake group. Additional exploratory analyses relying on equivalence testing and Bayesian statistics reveal that there is evidence against sleep having a detrimental effect on the retention of declarative memory at high information loads. We argue that forgetting occurs in both wake and sleep states through different mechanisms, i.e., through increased interference and through global synaptic downscaling, respectively. Both of these processes might scale similarly with information load. (shrink)

"""This book neither wants to make an accusation, nor impose things that are impossible to carry out. It merely wants to make the Balinese and tourists aware of what is happening in this paradise on earth and about the positive infl uence they can have in preserving the culture of the beautiful island of Bali. Tri Hita Karana, the spirit of Bali originated from the rich Balinese-Hindu philosophy. Tri Hita Karana means three causes of happiness: balanced and harmonious relationships of (...) humans with God; of humans with fellow human beings; and of humans with the surrounding nature. Respect and togetherness are essential values in this philosophy. The Hindu doctrine of tat tvam asi, “I am you and you are me”, teaches us that all things are connected. Humans who do not respect God, fellow humans and nature are not respecting themselves, and this will eventually lead to self-destruction. Respect and togetherness will lead to harmony and happiness. Since the Balinese are already living according to the age-old philosophy of Tri Hita Karana, they can contribute to a sustainable environment for their children. The past and the present cannot be separated from each other; the present is born out of the past. Our actions to create a sustainable environment today matter, or in Gandhi’s words: the future depends on what we do today. The authors, Jan Hendrik Peters, a former professor of service studies and Wisnu Wardana, chief-editor of Bali Travel Newspaper, are deeply concerned about the negative infl uences of mass tourism and want to plead for a sustainable future for Bali, by writing this book. “We really do need this book on Bali to make the Balinese people and the international tourists familiar with the essence of Hinduism. If the Balinese follow the philosophy of Tri Hita Karana as a guide in their personal life and business, it means that Bali will be the Island of the Gods forever.” - Ida Pedanda Subali Tianyar, Hindu high priest, Chairman of the Council of Hindu Priests in Indonesia.""". (shrink)

I take issue with the view that libertarian theory does not imply any particular stand on abortion. Liberty is the absence of interference with people’s wills—interests, wishes, and desires. Only entities that have such are eligible for the direct rights of libertarian theory. Foetuses do not; and if aborted, there is then no future person whose rights are violated. Hence the “liberal” view of abortion: women (especially) may decide whether to bear the children they have conceived. Birth is a good (...) dividing line between the freedom to abort and the point at which society is permitted to take an interest. Once born, children detach from their mothers; no invasion of their bodies is necessary to separate them. Yet some ways of bringing them up can have a negative impact on society. There is a thus legitimate interest in protecting ourselves from the results of truly bad parenting. (shrink)

Jan Salamucha was born on the 10th of June 1903 in Warsaw and murdered on the 11th of August 1944 in Warsaw during the Warsaw Uprising very early on in his scholarly career. He is the most original representative of the branch of the Lvov-Warsaw School known as the Cracow Circle. The Circle was a grouping of scholars who were interested in reconstructing scholasticism and Christian philosophy in general by means of mathematical logic. As Jan Lukasiewicz’s successor in the (...) area of logic and Konstanty Michalski’s student in the area of the history of medieval thought, Salamucha had an excellent preparation for this task. His main achievements include a masterful logical analysis of the proof _ex motu _for the existence of God, a modern interpretation of analogical notions and a comprehensive approach to the problem of essence. He also contributed several historical studies: he examined Aristotle’s theory of deduction, he reconstructed William Ockham’s propositional logic and established the authenticity of his treatise on _insolubilia,_ and he identified the historical sources of the antinomies in Antiquity and the Middle Ages. He did not shy away from popularizing philosophy, and in that work he was able to elucidate rather than oversimplify the complexities of philosophy. (shrink)

Hilbert's axiomatization program of physical theories met an interesting challenge when it confronted the rise of quantum mechanics in the mid-twenties. The novelty of the mathematical apparatus of the then newly born theory was to be matched only by its substantial lack of any definite physical interpretation. The early attempts at axiomatization, which are described here, reflect all the difficulty of the task faced by Jordan, Hilbert, von Neumann and others. The role of von Neumann is examined in considerable (...) detail as he can be viewed here as the most outstanding of Hilbert's heirs. Von Neumann, especially in his work devoted to the proof of the impossibility of hidden variables, not only continued Hilbert's program but pushed it to its very limits, blending axiomatic rigor and interpretative commitment. (shrink)

ABSTRACT Militant democracy calls for pre-emptive measures against political actors who use democratic institutions to undermine or outright abolish a democratic political system. Born in the context of interwar fascism, militant democracy has recently been revived by political and legal theorists concerned about the rise of authoritarian right-wing populists. A long-standing charge against militant democracy—also articulated with renewed force in our era—is that, as a top-down way to deal with the intolerant, militant democracy is inherently elitist and bears uncomfortable (...) similarities with technocracy. But while it is true that militant democracy relies on state institutions to preserve democracy, it by no means excludes citizen engagement: “courts or the people” is a false choice. On the other hand, citizens engaged in militant democracy must take on the difficult task of distinguishing very clearly between democratic essentials under threat and political questions about which citizens might reasonably disagree. While citizen assemblies are not the answer to all of contemporary democracies’ travails, they might be very helpful in clarifying such distinctions for wide audiences. (shrink)

Bernard Bolzano was born in Prague in 1781 and died in 1848 in the same city1. His major work Wissenschaftslehre was published in 1837 in Sulzbach, Germany.Since the publication of Jan Berg’s Bolza...

Gerold Tietz was born in 1941 in Horka (north Bohemia) in a family of Sudeten Germans. Germans lived in this village together with Czechs, Roma people and Jews. The family also involved Czech relatives and many of German relatives spoke good Czech and kept relations with Czech cultural groups. After the war Gerold Tietz and his family were expelled to Swabia. He studied history, French and political science. From 1969 the graduated historian lived in Esslingen where he taught in (...) the grammar school for thirty years. In the autobiographically oriented novels _Böhmische Fuge _(1997), _Böhmisches Richtfest _(2007) and in _Böhmische Grätschen _(2009) Tietz tried to depict official social-political events connected with famous political and cultural figures as well as the stories of ordinary days of “small people” who had to face the consequences of historic changes which influenced their lives. The paper analyses the conditions of Czech and German coexistence and confronts the authentic historic context. Nevertheless, negative features of these ethnic groups are not overlooked and the positive ones are presented as a positive contribution to the current European multiculturalism. (shrink)

A review essay: Søren Harnow Klausen’s Reality Lost and Found.

This chapter contains sections titled: The Breakthrough of the Refrigerant System CO2 Makes a Brief Appearance The New Wonder Refrigerants The Area of the HFC Gases A New Technology Is Born – in Norway The SHECCO Transcritical CO2 Circuit The CO2 Paradox.

The nineteenth century is a very important period from our contemporary point of view. It is then that many socio-political ideas were born and have affected our social and individual life until now. It is in the nineteenth century that humankind sought to reflect on freedom, individualism and progress, and often paid dearly for any utopian misinterpretations in this area. Last but not least, in the nineteenth century the modern philosophical perception clashed with Christianity. The paper sought to show (...) this intellectual turmoil by focussing on the main adherents of reconciling new ideas with religion. This reconciliation could be effected with an integral view of the human being in mind. The integral human being, advocated by Newman and Acton, can manage to abide by timehonoured traditions and assimilate whatever there is of positive value in civilization.Le 19ème siècle est une période riche en enseignements pour notre réflexion contemporaine. C'est durant ce siècle que nombre d'idées sociopolitiques ayant influé jusqu'à présent sur notre vie individuelle et sociale sont nées. C'est au 19ème siècle que l'humanité chercha à réfléchir sur la liberté, l'individualisme et le progrès, et elle paya au prix fort les erreurs d'interprétation utopiste commises dans ces domaines. Aussi, et non des moindres, c'est au 19ème siècle que la perception philosophique moderne entra en conflit avec le christianisme. L'article vise à dépeindre cette agitation intellectuelle en mettant l'accent sur les principaux tenants de la réconciliation des nouvelles idées avec la religion. Cette réconciliation peut se faire si on a à l'esprit une vision complète de l'être humain. Cet être humain complet, tel que défendu par Newman et Acton, possède les qualités suffisantes pour respecter les traditions ancestrales et assimiler ce qu'il y a de valeureux dans la civilisation. (shrink)

This paper urges that if we wish to give social intelligence to our agents, it pays to look at how we acquired our social intelligence ourselves. We are born with drives and motives that are innate and deeply social. Next, as children we are socialized to acquire norms and values and to understand rituals large and small. These social elements are the core of our being. We capture them in the acronym GRASP: Groups, Rituals, Affiliation, Status, Power. As a (...) consequence, economic rationality or logical reasoning do not suffice when it comes to social intelligence. Basic features of our social behaviour, of the kind that one sees early in the lives of children, need to be prominent. These include fear, love, and aggression. They extend to the combination of these drives with basic social clues from the environment such as big and small, good and bad, as well as culture-specific specializations of these. This will make agents respond differentially to inferred attributes such as gender, age, group membership. This level of universality in social intelligence should receive our full attention. The general insights gained can then be re-used in myriad implementations to specific modelling issues. (shrink)

The brain adapts to changes that take place in the body. Deprivation of input results in size reduction of cortical representations, whereas an increase in input results in an increase of representational space. Amputation forms one of the most dramatic disturbances of the integrity of the body. The brain adapts in many ways to this breakdown of the afferent–efferent equilibrium. However, almost all studies focus on the sensorimotor consequences. It is not known whether adaptation takes place also at other “levels” (...) in the system. The present study addresses the question whether amputees dream about their intact body, as before the amputation, or about the body after the amputation and whether the dream content was a function of time since the amputation and type of amputation. The results show that the majority of the dreamers reported dreams about their intact body although the mean time that elapsed since the amputation was twelve years. There is no clear relation with the type of amputation. The results give modest evidence for the existence of a basic neural representation of the body that is, at least, partly genetically determined and by this relatively insensitive for changes in the sensory input. (shrink)

The growth and sustainability of the nursing profession depends on the ability to recruit and retain the upcoming generation of professionals. Understanding the career choice experiences and professional expectations of Millennial nurses (born 1980 or after) is a critical component of recruitment and retention strategies. This study utilized Polkinghorne's interpretive, narrative approach to understand how Millennial nurses explain, account for and make sense of their choice of nursing as a career. The positioning of nursing as a virtuous choice was (...) both temporally and contextually influenced. The decision to enter the profession was initially emplotted around a traditional understanding of nursing as a virtuous profession: altruistic, noble, caring and compassionate. The centricity of virtues depicts one‐dimensional understanding of the nursing profession that alone could prove dissatisfying to a generation of professionals who have many career choices available to them. The narratives reveal how participants' perceptions and expectations remain influenced by a stereotypical understanding of nursing, an image that remains prevalent in society and which holds implications for the future recruitment, socialization and retention strategies for upcoming and future generations of nurses. (shrink)

Asking pregnant women to pay for non-invasive prenatal testing out of pocket leads to unequal access across socioeconomic strata. To avoid these social justice issues, first-trimester prenatal screening should be publicly funded in countries such as the Netherlands, with universal coverage healthcare systems that offer all other antenatal care services and screening programmes free of charge. In this reply, we offer three additional reasons for public funding of NIPT. First, NIPT may not primarily have medical utility for women and children, (...) but rather offers relevant information and reproductive options, and thus serves important autonomy interests of women. Second, public funding of NIPT can be justified because it results in a reduction of collectively borne costs associated with care and support for children with chromosomal abnormalities. It is important to note that this is not an argument for individual women to take part in screening or to terminate an affected pregnancy. However, it is a legitimate argument in policy making regarding funding arrangements for screening programmes. Finally, public funding would help to amend current misunderstandings among pregnant women, and thus to support informed consent for first-trimester prenatal screening. (shrink)

It can be tempting to think of affect as a matter of the present moment – a reaction, a feeling, an experience or engagement that unfolds right now. This paper will make the case that affect is better thought of as not only temporally extended but as saturated with temporality, especially with the past. In and through affectivity, concrete, ongoing history continues to weigh on present comportment. In order to spell this out, I sketch a Heidegger-inspired perspective. It revolves around (...) two claims. The first is that we should understand what Heidegger calls 'Befindlichkeit' (findingness) as radical situatedness. Affectivity is a matter of 'finding oneself' constellated – thrown – into the world in ways that outrun what an individual or collective might grasp and process. The second claim is that the temporal dimension, as a relatedness to the past, takes precedence in affect's situatedness. Key to affect is the way in which the past continues to hold sway over present comportment, collectively and individually. In order to articulate this perspective, it is important to overcome the idea that affect must be understood mainly in terms of feeling or experiential states of other kinds. Better suited to grasp the idea of findingness is the concept of 'disclosive posture', as proposed by Katherine Withy. I suggest that this notion should be put at the fore of a phenomenological approach to situated affectivity. (shrink)

Higher-order logic, with its type-theoretic apparatus known as the simple theory of types (STT), has increasingly come to be employed in theorizing about properties, relations, and states of affairs—or ‘intensional entities’ for short. This paper argues against this employment of STT and offers an alternative: ordinal type theory (OTT). Very roughly, STT and OTT can be regarded as complementary simplifications of the ‘ramified theory of types’ outlined in the Introduction to Principia Mathematica (on a realist reading). While STT, understood as (...) a theory of intensional entities, retains the Fregean division of properties and relations into a multiplicity of categories according to their adicities and ‘input types’ and discards the division of intensional entities into different ‘orders’, OTT takes the opposite approach: it retains the hierarchy of orders (though with some modifications) and discards the categorisation of properties and relations according to their adicities and input types. In contrast to STT, this latter approach avoids intensional counterparts of the Epimenides and related paradoxes. Fundamental intensional entities lie at the base of the proposed hierarchy and are also given a prominent part to play in the individuation of non-fundamental intensional entities. (shrink)

By and large, the conditional connective in three-valued logic has two different functions. First, by means of a deduction theorem, it can express a specific relation of logical consequence in the logical language itself. Second, it can represent natural language structures such as "if/then'' or "implies''. This chapter surveys both approaches, shows why none of them will typically end up with a three-valued material conditional, and elaborates on connections to probabilistic reasoning.

In lieu of an abstract, here is a brief excerpt of the content:In Memoriam: Jan Van Bragt (1928–2007)James W. HeisigEarly on the morning of Easter Thursday, April 12, 2007, Jan Van Bragt passed away quietly at the age of seventy-eight.1 During the previous year his health had begun to deteriorate, until in the final days of 2006 he was obliged to leave Kyoto and take up residence with his religious congregation in Himeji. On February 21, he was hospitalized with lung (...) cancer and was operated on some weeks later. After a brief period in a semi-comatose state, he regained consciousness but was never to speak again.Jan was born in Flemish Belgium and entered the Congregation of the Immaculate Heart of Mary at age eighteen. Six years later, he was ordained a priest. After receiving his master’s degree in philosophy, he entered the doctoral program and at the same time lectured at the congregation’s seminary. Five years later he received his doctoral degree in philosophy from the University of Leuven with a thesis on Hegel and immediately set sail for Japan, landing in December 1961.Jan undertook eighteen months of training in the language and then spent another eighteen months working as an assistant pastor at the Sakai Catholic Church near Osaka. In 1965, he was accepted as a research student at Kyoto University, where he spent the next six years studying with Takeuchi Yoshinori and Nishitani Keiji. In 1971, he was named provincial superior of the congregation in Japan, a post he held for five years until he was unexpectedly requested to serve as the first acting director of the newly established Nanzan Institute for Religion and Culture.For the next fifteen years Jan brought the fledgling institute to maturity, galvanizing the young and inexperienced staff into a community of scholars devoted to exploring the largely unknown and uncharted waters of interreligious dialogue in Japan. Among his first projects was the intermonastic exchange that brought leading Buddhist monks and nuns from Japan to European monasteries and vice versa. At a concluding symposium in Japan he served as chair, juggling Japanese, Flemish, German, French, and English with the skill and poise for which we all remember him. After a flurry of publications on the project, he left the project to others to carry on—as it has to this day, having reached a second generation, most of whom no longer know the inaugural role that he played.Jan was also a key figure in the Japan Society for Buddhist-Christian Studies, founded in 1982. In addition to bringing the central office of the society to the [End Page 141] Nanzan Institute, he served as president from 1989 to 1997. During his years at the Nanzan Institute, he was in demand around Japan as a lecturer or partner in dialogue. For many years he traveled around the world in the same capacity and was invited to teach in Canada, Belgium, the United States, and the Philippines. From 1985 to 1990, he served as a member of the Pontifical Council for Interreligious Dialogue. In his thinking and writing, his study and reading, as well as in his moral concerns, Jan straddled any number of civilizations, histories, literatures, and cultures. In the end, however, it was in Japan that he felt most at home, where he found a loom on which to weave the things of life into a single view of the world.At his funeral, Jan Swyngedouw, a fellow Flemish missionary and longtime colleague at the Nanzan Institute, delivered a thoughtful and touching tribute to a man who had always shied away from honors and recognition, preferring to let others stand on his shoulders and even accept the credit that was rightly his. Swyngedouw told of going through Jan’s library (the philosophical portion of which he graciously donated to the Centro Studi Asiatico in Osaka) and being struck by the number of volumes on mysticism. Like all of us, he knew of Jan’s academic interest in the Christian mystics as a bridge between religions, but as he read through comments in the margins he came to realize what most of us had never noticed: how deeply Jan’s own spirituality was rooted in... (shrink)

The paper examines the interplays between logic and politics in the Polish School of Logic starting from 1914. The Polish School of Logic flourished between 1920 and 1939. Philosophically, it was influenced by Kazimierz Twardowski (1866–1938). For Twardowski logic is fundamental for every kind of human activity, professional and private and this means that every argument should be formulated and proceed by correct inferential rules. These rules involve semiotics, formal logic and methodology of science. The paper shows how this position (...) was shared by Twardowski’s students, including Jan Łukasiewicz, Stanisław Leśniewski, Kazimierz Ajdukiewicz and Tadeusz Kotrabiński, as well as by the next generation of logicians and philosophers and especially by Alfred Tarski. These authors considered logic, philosophy and science as completely neutral with respect to politics and ideology but they also considered logical skills as indispensable in political activities. (shrink)

We introduce a cyclic proof system for the two-way alternation-free modal μ-calculus. The system manipulates one-sided Gentzen sequents and locally deals with the backwards modalities by allowing analytic applications of the cut rule. The global effect of backwards modalities on traces is handled by making the semantics relative to a specific strategy of the opponent in the evaluation game. This allows us to augment sequents by so-called trace atoms, describing traces that the proponent can construct against the opponent’s strategy. The (...) idea for trace atoms comes from Vardi’s reduction of alternating two-way automata to deterministic one-way automata. Using the multi-focus annotations introduced earlier by Marti and Venema, we turn this trace-based system into a path-based system. We prove that our system is sound for all sequents and complete for sequents not containing trace atoms. (shrink)

G. A. Cohen’s Rescuing Justice and Equality proposes that both concepts need rescuing from the work of John Rawls. Especially, it is concerned with Rawls’ famous second principle of justice according to which social primary goods should be distributed equally unless an unequal distribution is to the benefit of the worst off. The question is why this would ever be necessary if all parties are just. Cohen and I agree that Rawls cannot really justify inequalities on the basis given. But (...) he also thinks equality is the correct analysis of justice, though he provides no actual direct arguments for this. He does, however, provide a striking analytical argument claiming that fundamental principles of justice must be fact insensitive, and that Rawls’s view of justice violates this requirement. I argue that the requirement is itself misconceived and that principles of justice cannot possibly be fact insensitive in the sense developed by Cohen. Few philosophers share this view of Cohen’s—which I argue is due to several conceptual mistakes. With these ironed out, the contractarian view, broadly speaking, is seen to be plausible and powerful. Meanwhile Cohen appears to embrace intuitionism, a stance that cannot possibly be acceptable in social philosophy. In the end, Cohen is successful in arguing that Rawls cannot have what he wants, but neither is Cohen successful in claiming that justice is equality. (shrink)

Introduction: what is a sentence? -- Slogans and other one-liners -- The poetic line -- Sentences terminable and interminable -- The democratic sentence -- Conclusion: the sentence fetish.

This book traces the development of the Polish theory of history, analyzing how Jerzy Topolski, Krzysztof Pomian, and Olga Tokarczuk have both built upon and transgressed the metahistorical theories of American historian Hayden White. By deconstructing and reconstructing contemporary theories of history, this research is a unique contribution to the fields of historiography and the philosophy of history.

Humanitarian aid’s psycho-therapeutic turn in the 1990s was mirrored by the increasing emotionalization and subjectivation of fund-raising campaigns. In order to grasp the depth of this interconnectedness, this article argues that in both cases what we see is the post-Fordist production paradigm at work; namely, as Hardt and Negri put it, the direct production of subjectivity and social relations. To explore this, the therapeutic and mental health approach in humanitarian aid is juxtaposed with the more general phenomenon of psychologization. This (...) allows us to see that the psychologized production of subjectivity has a problematic waste-product as it reduces the human to Homo sacer, to use Giorgi Agamben’s term. Drawing out a double matrix of a de-psychologizing psychologization connected to a politicizing de-politicization, it will further become possible to understand psycho-therapeutic humanitarianism as a case of how, in these times of globalization, psychology, subjectivity and money are all interrelated. (shrink)

How should we construe the unity, in affective experience, of felt bodily changes on the one hand and intentionality on the other, without forcing affective phenomena into a one-sided theoretical framework such as cognitivism? To answer this question, I will consider the specific kind of self-awareness implicit in affectivity. In particular, I will explore the idea that a bodily sense of ability is crucial for affective self-awareness. Describing the affective ways of “grasping oneself” manifest in a person’s felt sense of (...) ability will help us understand the intimate connection between bodily feelings and intentionality in affective processes. In order to illustrate these experiential structures in a concrete case, I will discuss experiential changes often reported by sufferers of depression. (shrink)

The paper discusses properties of 4QL, a DATALOG⌉⌉-like query language, originally outlined by Maluszyński and Szalas (Maluszyński & Szalas, 2011). 4QL allows one to use rules with negation in heads and bodies of rules. It is based on a simple and intuitive semantics and provides uniform tools for “lightweight” versions of known forms of nonmonotonic reasoning. Negated literals in heads of rules may naturally lead to inconsistencies. On the other hand, rules do not have to attach meaning to some literals. (...) Therefore 4QL is founded on a four-valued semantics, employing the logic introduced in (Maluszyński et al., 2008; Vitória et al., 2009) with truth values: ‘true’, ‘false’, ‘inconsistent’ and ‘unknown’. In addition, 4QL is tractable w.r.t. data complexity and captures PTIME queries. Even though DATALOG⌉⌉ is known as a concept for the last 30 years, to our best knowledge no existing approach enjoys these properties.In the current paper we:investigate properties of well-supported models of 4QLprove the correctness of the algorithm for computing well-supported modelsshow that 4QL has PTIME data complexity and captures PTIME. (shrink)

Important sceptical arguments by Sextus Empiricus, Hume and Boghossian (concerning disputes, induction, and relativism respectively) are based on circularities and infinite regresses. Yet, philosophers' practice does not keep circularities and infinite regresses clearly apart. In this metaphilosophical paper I show how circularity and infinite regress arguments can be made explicit, and shed light on two powerful tools of the sceptic.

Les Premiers Analytiques sont pour Lukasiewicz un livre de logique et non de philosophie. Il dit meme que cet ouvrage de pure logique ne contient aucune contamination philosophique. Mais cela ne veut pas dire qu'il n'a rien a apprendre aux philosophes et aux metaphysiciens sur les formalismes et sur les modalites. Comme le dit Lukasiewicz: Il reste encore des philosophes en activite auxquels il ne serait peut-etre pas impossible de suggerer qu'ils devraient acquerir une bonne connaissance de la logique dite (...) mathematique avant de traiter de la logique et de son histoire; ils eviteraient ainsi de perdre leur temps, leurs lecteurs de meme, ce qui n'est peut-etre pas denue d'importance pratique. Lukasiewicz est l'un des philosophes de l'Ecole de Lvov-Varsovie, courant philosophique majeur du XXe siecle. Son premier livre portait sur le principe de contradiction chez Aristote. Il en montrait l'importance, mais aussi la fragilite logique. Son dernier livre, consacre a la syllogistique, une partie de la logique, porte de nouveau sur Aristote. Pour peu qu'elle n'ignore pas Frege, les matrices logiques de Peirce, les Principia Mathematica de Russell et Whitehead ainsi que les apports considerables des logiciens polonais, comme Lesniewski, Sfupecki, et Lukasiewicz lui-meme, l'histoire de la logique, et en l'occurrence l'etude des Premiers Analytiques, constitue une voie d'acces privilegiee pour comprendre ce que sont les formalismes. (shrink)