In [E. Baro, M. Otero, On o-minimal homotopy, Quart. J. Math. 15pp, in press ] o-minimal homotopy was developed for the definable category, proving o-minimal versions of the Hurewicz theorems and the Whitehead theorem. Here, we extend these results to the category of locally definable spaces, for which we introduce homology and homotopy functors. We also study the concept of connectedness in -definable groups — which are examples of locally definable spaces. We show that the various concepts of connectedness (...) associated to these groups, which have appeared in the literature, are non-equivalent. (shrink)

The societal and ethical impacts of emerging technological and business systems cannot entirely be foreseen; therefore, management of these innovations will require at least some ethicists to work closely with researchers. This is particularly critical in the development of new systems because the maximum degrees of freedom for changing technological direction occurs at or just after the point of breakthrough; that is also the point where the long-term implications are hardest to visualize. Recent work on shared expertise in Science & (...) Technology Studies (STS) can help create productive collaborations among scientists, engineers, ethicists and other stakeholders as these new systems are designed and implemented. But collaboration across these disciplines will be successful only if scientists, engineers, and ethicists can communicate meaningfully with each other. The establishment of a trading zone coupled with moral imagination present one method for such collaborative communication. (shrink)

Timothy Williamson has defended the claim that any philosophically satisfying conception of modality that encompasses possible worlds semantics (PWS) commits us to the Barcan Formula. His argument depends on the assumption that the domain of what there is (the domain of the actual world) has to be identified with the domain D(@), where @ is the index or possible world that in PWS represents , or stands for , the actual world. I work out an interpretation of the relation between (...) PWS and possible worlds terminology that makes it plausible to reject that assumption. (shrink)

Hume argued that inductive inferences do not have rational justification. My aim is to reject Hume’s argument. The discussion is partly motivated by an analogy with Carroll’s Paradox, which concerns deductive inferences. A first radically externalist reply to Hume (defended by Dauer and Van Cleve) is that justified inductive inferences do not require the subject to know that nature is uniform, though the uniformity of nature is a necessary condition for having the justification. But then the subject does not have (...) reasons for believing what she believes. I defend a moderate externalist account that seeks to partly accommodate that objection to the radical externalist proposal. It is based on an extension of Peacocke’s theory of concepts: possession conditions for predicative concepts standing for natural properties include (fallible) dispositions to project them to new cases in accordance with inductive inferential patterns. (shrink)

Let M be an o-minimal expansion of an ordered field. Let φ be a formula in the language of ordered domains. In this note we establish some topological properties which are transferred from $\varphi^M$ to $\varphi^R$ and vice versa. Then, we apply these transfer results to give a new proof of a result of M. Edmundo-based on the work of A. Strzebonski-showing the existence of torsion points in any definably compact group defined in an o-minimal expansion of an ordered field.

En este artículo discuto el supuesto compromiso de la lógica modal cuantificada con el esencialismo. Entre otros argumentos, Quine, el más emblemático de los críticos de la modalidad, ha objetado a la lógica modal cuantificada que ésta se compromete con una doctrina filosófica usualmente considerada sospechosa, el esencialismo: la concepción que distingue, de entre los atributos de una cosa, aquellos que le son esenciales de otros poseidos sólo contingentemente. Examino en qué medida Quine puede tener razón sobre ese punto explorando (...) una analogía entre la lógica modal y la logica clásica de primer orden. Con ello se pretende proporcionar una visión clarificadora sobre el estatus de la lógica modal y su relación con la lógica en general.In this paper I discuss the alleged commitment of quantified modal logic to philosophical essentialism. Besides some other more or less related arguments against quantified modal logic, Quine (its more prominent critic) objects to it by claiming its commitment to a philosophical doctrine usually regarded as suspicious, essentialism: the view that some of the attributes of a thing are essential to it, and others are accidental. I study to what extent Quine can be right about this specific issue. I defend some of his views by exploring an analogy between modal logic and standard first order logic. That serves to get a better understanding of the status of modal logic and its relation with logic in general. (shrink)

Models of normal open induction are those normal discretely ordered rings whose nonnegative part satisfy Peano's axioms for open formulas in the language of ordered semirings. (Where normal means integrally closed in its fraction field.) In 1964 Shepherdson gave a recursive nonstandard model of open induction. His model is not normal and does not have any infinite prime elements. In this paper we present a recursive nonstandard model of normal open induction with an unbounded set of infinite prime elements.

We consider IOpen, the subsystem of PA (Peano Arithmetic) with the induction scheme restricted to quantifier-free formulas. We prove that each model of IOpen can be embedded in a model where the equation x 2 1 + x 2 2 + x 2 3 + x 2 4 = a has a solution. The main lemma states that there is no polynomial f(x,y) with coefficients in a (nonstandard) DOR M such that $|f(x,y)| for every (x,y) ∈ C, where C is (...) the curve defined on the real closure of M by C: x 2 + y 2 = a and $a > 0$ is a nonstandard element of M. (shrink)

Models of normal open induction (NOI) are those discretely ordered rings, integrally closed in their fraction field whose nonnegative part satisfy Peano's induction axioms for open formulas in the language of ordered semirings. Here we study the problem of representability of an element a of a model M of NOI (in some extension of M) by a quadratic form of the type X2 + bY2 where b is a nonzero integer. Using either a trigonometric or a hyperbolic parametrization we prove (...) that except in some trivial cases, M[ x, y] with x2 + by2 = a can be embedded in a model of NOI. We also study quadratic extensions of a model M of NOI; we first prove some properties of the ring of Gaussian integers of M. Then we study the group of solutions of a Pell equation in NOI; we construct a model in which the quotient group by the squares has size continuum. (shrink)

En el contexto de este artículo denominaremos mentalismo a la conjunción de dos tesis diferentes: (i) para que las expresiones lingüísticas tengan significado es necesario que haya entidades de carácter mental; (ii) tales entidades mentales son suficientes para fijar el significado de las expresiones correspondientes (es decir, lo determinan). Es característico deI segundo Wittgenstein el rechazo a ambas tesis. Pero son sus argumentos contra (ii), especialmente a partir de las consideraciones sobre seguir una regla, los que han concentrado casi toda (...) la atención. En este trabajo presento el argumento principal de Wittgentein contra (i), diferenciándolo de sus objeciones a (ii).In this article mentalism will be used to denominate the conjunction of two thesis: (i) it is a necessary condition for linguistic expressions having meaning the existence of mental entities; (ii) these mental entities are sufficient to fix the meaning of the corresponding expressions (they determine it). The two thesis are rejected by the later Wittgenstein. Most of the attention, though, has been paid to his arguments against (ii), especially based on discussions of rule-following. In this paper I work out Wittgenstein’s main argument against (i), and I distinguish it from his objections to (ii). (shrink)

In John Etchemendy's book, The Concept of Logical Consequence, several arguments are put forth against the standard model‐theoretic account of logical consequence and logical truth. I argue in this article that crucial parts of Etchemendy's attack depend on a failure to distinguish two senses of logic and two correlative senses of being something a logical question. According to one of these senses, the logic of a language, L, is the set of logical truths of L. In the other sense, logic (...) is a theoretical discipline whose aim is to characterize logical properties and it can be identified with the set of sentences on what, and why, the extension of the set of logical truths of a particular language is. Some particular claims by Etchemendy about the status assigned to the axiom of infinity in the model‐theoretic account are criticized and shown to be erroneous because of that conflation. (shrink)

Patricia De Martelaere was a Belgian author, philosopher, and practitioner of shadowboxing. She wrote an inspiring little book on Taoism that stresses the physical, energetic, and martial aspects of its practice. This paper elaborates upon three central ideas from her work, turns them into a direction that she did not envision, and applies them to a critical-historical interpretation of the Taoist texts that she elaborates upon: an active way of non-knowing, the awareness of a shared ground, and the intellectual (...) fertility resulting from this approach. By occasionally putting aside certain assumptions from contemporary research on early Chinese Taoist philosophers - with respect to books, authors, philosophical consistency, schools, etc. - we can offer alternative accounts to the now dominant forms of interpretation. This approach does not take a position in favor of or against the existence or importance of such entities as “books‘, “philosophers‘, or “schools‘ in pre-imperial China. Nor does it promote an alternative for the dominant narratives. It simply allows for a degree of openness with respect to these narratives, thereby allowing for greater nuance that is at risk of being suffocated in the current context of academic philosophy. (shrink)

Critical Race Theory (C.R.T.) has developed out of a deep dissatisfaction that many black legal scholars in the U.S. felt with liberal civil rights discourse, a discourse premised upon the ideals of assimilation, ‘colour-blindness’ and integration. In addition, the emergence of the Critical Legal Studies movement provided Critical Race theorists with an innovative lexicon and practice which allowed them to develop a critique of traditional race analysis and U.S. law. Patricia Williams has played a key role in the formation (...) of the C.R.T. movement and is concerned with many of the C.R.T. themes: the understanding that traditional civil rights law has benefited whites more than blacks, the ‘call to context’, and the critique of liberalism by the assertion that racism is routine and not aberrational. Following the C.R.T. belief that form and substance are connected, Williams has also extended the boundaries of another C.R.T. theme by (largely) eschewing the conventional genre of legal writing in much of her work, including her two books, The Alchemy of Race and Rights and The Rooster's Egg. This was one of the issues Williams discussed in an interview that commenced when she visited Britain in 1997 to deliver the Reith Lectures. (shrink)

The poetry of Blas de Otero (1961) andYehudaAmichai (1924-2000) invites the 20th century human being to speak out on the main issues of his existence: love, loneliness, suffering, solidarity, injustice, death, hope. A central place in their work is taken up by the merciful and faithful God of the Bible, whose image seems to be refuted by the dramatic situation in which the human being happens to live. The poet’s word stands up against God’s word equipped with his resources: (...) intertextuality, metaphor, comparison, antithesis, sound effects, irony. Both authors place the reader before the task of construct and deconstruct the depiction of the Biblical God. (shrink)

An imperfect duty such as the duty to aid those in need is supposed to leave leeway for choice as to how to satisfy it, but if our reason for a certain way of satisfying it is our strongest, that leeway would seem to be eliminated. This paper defends a conception of practical reasons designed to preserve it, without slighting the binding force of moral requirements, though it allows us to discount certain moral reasons. Only reasons that offer criticism of (...) alternatives can yield requirements, but our reasons for particular ways of satisfying imperfect duties merely count in favor of the acts in question. When the state is authorized to take over charitable obligations, it should not be seen as enforcing fulfillment of our imperfect duties, but rather as forcing us to help fulfill collective duties that may be substantially modified by transfer to the state, replacing imperfect duties with perfect. Besides the cost to us in freedom of choice there is a moral cost to replacing the virtuous motives of charity with those that tend to accompany paying taxes. However, a compensating feature of state involvement is the fact that its more precise demands come with limits. (shrink)

The ethical ‘eye’ of nursing, that is, the particular moral vision and values inherent in nursing work, is constrained by the preoccupations and practices of the superordinate biomedical structure in which nursing as a practice discipline is embedded. The intimate, situated knowledge of particular persons who construct and attach meaning to their health experience in the presence of and with the active participation of the nurse, is the knowledge that provides the evidence for nurses’ ethical decision making. It is largely (...) invisible to all but other nurses. Two nurse researchers, Joan Liaschenko of the University of Minnesota and Patricia Rodney of the University of Victoria, have investigated the ethical concerns of practising nurses and noted in their separate enquiries the invisible nature of critical aspects of nursing work. Noting the similarities in their respective observations, and with the feminist ethics of Margaret Urban Walker as a theoretical framework, this article examines the concept of ‘invisibility’ as it relates to nursing work and nursing ethics. (shrink)

I argue that Patricia Kitcher's Kant-inspired account of self-consciousness overintellectualizes the requirements for rational cognition. Kitcher claims that a person can only believe something on the ground of another belief if she is able to recognize the grounding belief as grounding the first belief and as one of her own. I criticize this claim by arguing that (i) someone can believe something for a certain reason without recognizing this reason as a reason (the possibility of unreflected reasons), and that (...) (ii) she can recognize something as a reason for something else without being able to self-ascribe either her original belief or the belief that grounds it (the possibility of reflected but not self-conscious reasons). (shrink)

La colección Revuelta Filosófica nos propone un retorno a pensadores que se pusieron por encima del orden filosófico establecido. Por esto mismo no nos sorprende que Kierkegaard esté en esta colección, y más bien decimos que no podía dejar de asistir a la reunión. Fiel a su pensamiento, Kierkegaard le pone el cuerpo, la pluma y el alma a sus escritos, en los cuales la literatura se entrelaza con la filosofía, y la psicología se vuelve un teatro en el que (...) uno tras otro aparecen figuras, pseudónimos y personajes que enmascaran el rostro del autor a través de la ironía. ¿Quién se encarga de darle voz a Kierkegaard? Patricia Dip, quien le ha dedicado gran parte de su vida académica a estudiar al danés, no puede ser mejor compañía. La autora presenta a Kierkegaard en dos dimensiones, la literaria y la filosófica, donde lo distintivo es la máscara, rasgo que le permiten ubicar al pensador danés entre los teóricos contemporáneos de la ideología, es decir Marx, Nietzsche y Freud. El escenario, 255 páginas, divididas en un estudio preliminar, selección de fuentes y bibliografía de referencia. El estudio preliminar del libro cuenta con cuatro apartados en los cuales la autora recorre tópicos fundamentales del pensamiento kierkegaardiano. (shrink)

There are now quite a number of popular or semi-popular works urging rejection of the old opposition between rationality and emotion. They present evidence or theoretical arguments that favour a reconception of emotions as providing an indispensable basis for practical rationality. Perhaps the most influential is neuroanatomist Antonio Damasio's Descartes' Error, which argues from cases of brain lesion and other neurological causes of emotional deficit that some sort of emotional ‘marking,’ of memories of the outcomes of our choices with anxiety, (...) is needed to support learning from experience. (shrink)

Los años 80 han atraido, en los últimos tiempos, una serie de miradas nostálgicas, sobre todo hacia su música. Lejos de esa atmósfera está “ El Canto Nuevo de Chile. Un Legado Musical ”, de Patricia Díaz-Inostroza.Por el contrario, se trata de una investigación que, si bien está centrada en el movimiento llamado Canto Nuevo, abarca mucho más que eso, dejando en claro las profundas raíces históricas que afirman este tipo de música. Ese es un aporte innegable, que permite (...) al lector (o lectora) .. (shrink)

(2011). Theory in Health Promotion Research and Practice: Thinking outside the Box. Patricia Goodson. Boston, MA: Jones and Bartlett. 2010. 245, pp. $78.95. Educational Studies: Vol. 47, No. 6, pp. 583-588.

The Ethics of Dust: Doge's Palace, Venice, is an installation resulting from the experimental preservation of the pollution accumulated on the Doge's Palace of Venice. Traditionally, only the intentional products of human labor, such as art or architecture, have been considered part of our cultural heritage. Pollution is a formless byproduct that was never intentionally shaped; yet it is perhaps our civilization's most significant cultural product. Jorge Otero-Pailos' preservation of pollution expands the notion of world heritage to include our (...) unintentional outputs. Published on the occasion of the presentation of The Ethics of Dust: Doge's Palace, Venice​ at the 53rd International Art Exhibition / Biennale di Venezia, 2009. The Ethics of Dust: Doge's Palace, Venice​ was commissioned and produced by TBA21. The book includes text contributions Daniel Birnbaum, Francesca von Habsburg, Thordis Arrhenius, Daniel A. Barber, Valeria Burgio, Dorota Chudzicka, Lorenzo Fusi, David Gissen, Caroline A. Jones, Jorge Otero-Pailos , Adam Phillips, Raqs Media Collective, Mark Wigley. (shrink)

A core thesis of Kitcher's is that thinking about objects requires awareness of necessary connections between one's object-directed representations ‘as such’ and that this is what Kant means by the transcendental unity of apperception. I argue that Kant's main point is the spontaneity or ‘self-made-ness’ of combination rather than the requirement of reflexive awareness of combination, that Kitcher provides no plausible account of how recognition of representations ‘as such’ should be constituted and that in fact Kant himself appears to lack (...) the theoretical resources to clearly distinguish between consciousness and self-consciousness or apperception properly so-called. (shrink)