Most philosophers assume that ‘ought’ implies ‘can’, and most of them hold that this principle is true not only universally but also analytically or conceptually. Some skeptics deny this principle, although they often admit some related one. In this article, we show how new empirical evidence bolsters the skeptics’ arguments. We then defend the skeptical view against some objections to the empirical evidence and to its effect on the traditional principle. In light of the new evidence, we conclude that philosophers (...) should stop unconditionally assuming that ‘ought’ implies ‘can’. (shrink)

Logic is usually presented as a tool of rational inquiry; however, many logicians in fact treat logic so that it does not serve us, but rather governs us – as rational beings we are subordinated to the logical laws we aspire to disclose. We denote the view that logic primarily serves us as logica serviens, while denoting the thesis that it primarily governs our reasoning as logica dominans. We argue that treating logic as logica dominans is misguided, for it leads (...) to the idea of a “genuine” logic within a “genuine” language. Instead of this, we offer a naturalistic picture, according to which the only languages that exist are the natural languages and the artificial languages logicians have built. There is, we argue, no language beyond these, especially none that would be a wholesome vehicle of reasoning like the natural languages and yet be transparently rigorous like the artificial ones. Logic is a matter of using the artificial languages as idealized models of the natural ones, whereby we pinpoint the laws of logic by means of zooming in on a reflective equilibrium. (shrink)

We find an explicit basis for all admissible rules of the modal logic S4. Our basis consists of an infinite sequence of rules which have compact and simple, readable form and depend on increasing set of variables. This gives a basis for all quasi-identities valid in the free modal algebra ℱS4 of countable rank.

The article attempts to raise a question and give an answer to it regarding the evaluation of the philosophical creativity of Hermann Cohen, the German-Jewish thinker of the late XIX - early XX century. Moreover, following the philosophical style of Cohen himself, the question posed and discussed in the article is not idle, but it contains a hypothesis that forms our answer in a certain way. It is important to identify the difficulties and intellectual determinants that prevent the formation of (...) a clear and unambiguous answer. At the same time these difficulties contain an initiating moment for opening a philosophical debate. The historical and philosophical reasons that make the very beginning of the discussion of the question more complex, are considered. The article, of course, cannot claim to be an exhaustive answer on such a fundamental topic, which is contained in the designated question. But the article itself, and the articles following it in the section devoted to the work of Herman Cohen, may be indicate that the time for this discussion has come. (shrink)

The scheme for classifications of concepts is introduced. It has founded on the triplet model of concepts. In this model a concept is depicted by means of three kinds of knowledge: a concept base, a concept representing part and the linkage between them. The idea of triplet classifications of concepts is connected with a usage of various specifications of these knowledge kinds as classification criteria.

In this study, voluntary and involuntary visual attention focused on different interpretations of a bistable image, were investigated using magnetoencephalography. A Necker cube with sinusoidally modulated pixels' intensity in the front and rear faces with frequencies 6.67 Hz and 8.57 Hz, respectively, was presented to 12 healthy volunteers, who interpreted the cube as either left- or right-oriented. The tags of these frequencies and their second harmonics were identified in the average Fourier spectra of the MEG data recorded from the visual (...) cortex. In the first part of the experiment, the subjects were asked to voluntarily control their attention by interpreting the cube orientation as either being on the left or right. Accordingly, we observed the dominance of the corresponding spectral component, and voluntary attention performance was measured. In the second part of the experiment, the subjects were asked to focus their gaze on a red marker at the center of the cube image without putting forth effort in its interpretation. The alternation of the dominant spectral energies at the second harmonics of the stimulation frequencies was treated as changes in the cube orientation. Based on the results of the first experimental stage and using a wavelet analysis, we developed a method which allowed us to identify the currently perceived cube orientation. Finally, we characterized involuntary attention using the distribution of dominance times when focusing attention on one of the cube orientations, which was related to voluntary attention performance and brain noise. In particular, we confirmed our hypothesis that higher attention performance is associated with stronger brain noise. (shrink)

The triplet model treats a concept as complex structure that expresses three kinds of information. The first is about entities subsumed under a concept,their properties and relations. The second is about means and ways of representing the first information in intelligent systems. The third is about linkage between the first and second ones and methods of its constructing. The application of triplet models to generalization and development of concept models in philosophy, logic, cognitive psychology, cognitive science, linguistics, artificial intelligence has (...) been demonstrated. The componential structure of the triplet model and extended concept classification have been given. Theoretical considerations are combined with historical case-studies of concept history. For scientists and students with an interest in problems of knowledge structure and representation. Abstract and Extended Summary in English. (shrink)

The paper has three objectives: to expound a set-theoretical triplet model of concepts; to introduce some triplet relations (symbolic, logical, and mathematical formalization; equivalence, intersection, disjointness) between object concepts, and to instantiate them by relations between certain physical object concepts.

It is proposed to analyze fuzzy concepts and relations between them in the frame of triplet concept modeling. Fuzzy concepts are introduced by means of the so-called fuzzification of dichotomous concepts. The cognitive and psychological aspects of concept possession are separated and studied.

It is proposed to analyze the unity of scientific knowledge in terms of its structure-nominative reconstruction. -/- .

There are no universally adopted answers to the natural questions about scientific concepts: What are they? What is their structure? What are their functions? How many kinds of them are there? Do they change? Ironically, most if not all scientific monographs or articles mention concepts, but the scientific studies of scientific concepts are rare in occurrence. It is well known that the necessary stage of any scientific study is constructing the model of objects in question. Many years logical modeling was (...) dominant in the concept studies. Last decades, concepts came to be regarded as the subject of mathematical modeling. However, different authors take different features of concepts as independent variables of their models. Our objective is to characterize informally the spectra of relevant variables for the modeling of scientific concepts. (shrink)

The changes of concepts are described in the frame of concept triplet model. -/- .

In one of the first genetic screens aimed at identifying induced developmental mutants, Nadine Dobrovolskaïa-Zavadskaïa, working at the Pasteur Laboratory in the 1920s, isolated and characterized a mutation affecting Brachyury, a gene that regulates tail and axial development in the mouse. Dobrovolskaïa-Zavadskaïa's analysis of Brachyury and other mutations affecting tail development were among the earliest attempts to link gene action with a tissue-specific developmental process in a vertebrate. Her analyses of genes that interacted with Brachyury led to the discovery of (...) the t-haplotype chromosome of mouse. After 70 years, Brachyury and the multiple genes with which it interacts continue to occupy a prominent focus in developmental biology research. A goal of this review is to identify the contributions that Dobrovolskaïa-Zavadskaïa made to our current thinking about Brachyury and how she helped to shape the dawn of the field of developmental genetics. BioEssays 23:365–371, 2001. © 2001 John Wiley & Sons, Inc. (shrink)

The article draws a conceptual distinction the (French) structuralism of the 50’s–60’s and the post-structuralism of the 70’s, which are discussed as overlapping in their intellectual paths; their mutual dynamics is defined as a reaction of the intelligence to the pressure of depersonalized unified schemes within the logic of structuralism against free improvisation and loose interpretation instead of total explanations in the post-structuralism interpretation. The article establishes a conceptual identity of the paradoxical nature between post-structuralism (and deconstructionism, which is homogeneous (...) and identical thereto in a number of aspects), on the one hand, and constructionism with its specific process of language dismantling – social/ideological languages, social group dialects, on the other hand, which naturally leads the authors to the analysis of the paradoxicality principles, defined by post-structuralism (five principles of paradoxicality of Gilles Deleuze – paradox of regress, paradox of sterile reiteration, paradox of neutrality, paradox of absurd, paradox of Levi-Strauss); poststructuralists’ paralogisms are examined through paradoxical denotation; the late Roland Barthes’ phenomenon of paradoxicality, becoming a plot-forming principle of narration, is analyzed. Poststructuralism is conceptualized in the article as the first decisive step of post-modernism; the affinity of post-structuralist and postmodernist commitment to parody, game and irony is stated; the theory of language games in post-modern interpretation is explored; one of those games – a game of carnival – is explored within the diachronic retrospective; the affinity of parody and carnival tradition of post-structuralism and post-modernism to the romantic irony of the XIXth century and its inconsistency with the popular culture of laugh is established. The genesis of poststructuralism and post-modernism is connected with the ideological restart of the Western society before the “very end” of the Resistance ideas and the disappointment of the left European intellectuals in the “great legends” and illusions of Marxism. The blurred concepts of relativism are connected with the mutual disproportion of different layers of historical experience. (shrink)

Im Unterschied zum christlichen Begriff der Gerechtigkeit als einer sittlichen Tugend, wie es Thomas von Aquin zusammenfasste, als einer Einstellung, kraft deren ein Mensch festen und steten Willens jedem sein Recht zukommen lässt, erkennt Nietzsche die Herkunft der Gerechtigkeit im Ausgleich oder Kompromiss zwischen ungefähr gleich Mächtigen sowie im Zwang der weniger Mächtigen zu einem Ausgleich. Zur Untermauerung dieser Einstellung, die sich auf der Behauptung gründet, dass das Leben seinem innersten Wesen nach eine Aneignung sei bzw. dass der Wille zur (...) Macht den Lebenswillen schlechthin ausmache, griff Nietzsche auf den von Thukydides geschilderten Dialog der Athener und Melier zurück. Der Autor kommt jedoch zu dem Schluss, dass Nietzsche nicht nur ein Denker der Macht war, sondern nach einem neuen Verständnis der Gerechtigkeit trachtete, das aus der Gesamtheit seines Denkens zu deuten sei. (shrink)

We generalize, on higher projective levels, a construction of “incompatible” generic Δ1 3 real singletons given by Jensen and Johnsbråten.

The paper offers an interpretation of Plato’s Necessity in the Timaeus according to which Necessity is an entity which manifests itself in different ways at different stages of the creation of the Universe. The main argument aims to show that Necessity gains at least two different meanings in the course of the creation as described by Plato – that of limiting consequences and that of purposeless motion ; that despite the fact that Necessity is not a self-sustained principle, it has (...) its origin in chōra which is a condition of limiting material spatiality; that the important question what the effects of Necessity in the already created world are should be asked but cannot be easily answered on the basis of what Plato explicitly says. (shrink)

Prvi deo ovog rada, objavljen u prethodnom broju casopisa, bio je posvecen razmatranju religijskog porekla dvojnosti 'duha' i 'slova', a zatim i pitanju njenog znacenja u kontekstu filozofije ranog nemackog idealizma. Ovaj, drugi i zakljucni deo rada usredsredjuje se na eticke implikacije tog pitanja, posto je suprotstavljanje 'duha2 Kantovog sistema njegovom 'slovu', uz cesta pozivanja na novozavetno ispunjenje mojsijevskog zakona ljubavlju i verom predstavljalo jednu od osnovnih strategija kriticara Kantove teorije morala. Krajnja konsekvenca ovog pravca kritike Kanta lezi u ukidanju (...) autoriteta transcendentne moralne norme. Ovaj korak, kojim se istovremeno ponistava autoritet teksta kao takvog, a time i stav komentara kao literarnog zanra moze se uociti vec u Hegelovim mladalackim teoloskim spisima, u kojima se zastupa ukidanje transcendencije moralnog zakona njegovim inkorporiranjem u slobodnu subjektivnost koja egzistira u zajednici verujucih hriscana. (shrink)

Despite continuous efforts to reduce poverty on the global, national and communal levels the problem of closing the income gap remains serious. In this work, we analyze why the traditional infrastructure-based approach to development is becoming less effective. We have identified some features of the promising new approach, described in the collection of works "Self-Transformation of the Forgotten Four-Fifths" edited by Robert G. Dyck and Matjaz Mulej. The new approach could be applied in the information age when knowledge becomes a (...) key variable of development. (shrink)

In terms of formal deductive systems and multi-dimensional Kripke frames we study logical operations know, informed, common knowledge and common information. Based on [6] we introduce formal axiomatic systems for common information logics and prove that these systems are sound and complete. Analyzing the common information operation we show that it can be understood as greatest open fixed points for knowledge formulas. Using obtained results we explore monotonicity, omniscience problem, and inward monotonocity, describe their connections and give dividing examples. Also (...) we find algorithms recognizing these properties for some particular cases. (shrink)

trata-se de discutir as relações entre a constituição da paranoia como categoria clínica e experiências estético-sociais de crise. Esta é uma maneira de se perguntar sobre as relações que categorias clínicas tecem com processos e valores advindos dos campos da política e da estética.

We prove two theorems concerning expressive power of relational and functional languages. The theorems have interesting consequences for the history of philosophy and logic.

Representative models are considered parts of real scientific theories.

A definable pair of disjoint non-OD sets of reals exists in the Sacks and ????0-large generic extensions of the constructible universe L. More specifically, if a∈2ω is eith...

In his (several times reprinted) article How Wide Is the Gap Between Facts and Values? N. Rescher aspires to clarify the long-lasting discussion on the ‘is-ought’ (‘fact-value’) gap by providing a framework in which the related arguments can be perspicuously articulated. He then argues that even if the logical gap may bereal, the transition from factual premises to value conclusions is smoothly mediated by trivially true value statements. We scrutinize Rescher’s argumentation and show defects in the presented lines of reasoning. (...) In particular, we argue that his tripartite division of statements (factual, evaluative, hybrid), as well as his emphasis on the role of evaluative truisms, introduce serious problems that escape Rescher’s attention. We thus conclude that he failed to achieve his goals. (shrink)

This article discusses the connection between the ideas of Fyodor M. Dostoevsky and Vladimir S. Solovyov on the need for cultural and moral transformation of those who would claim to participate in...

My dear Aleksandr!I have finally found some quiet time for a slow and attentive read of your article “The Beginning of the Black Notebooks.”1 I very much liked the article, especially for your trul...