In this work we study the behavior of a time discrete multiregional stochastic model for a population structured in age classes and spread out in different spatial patches between which individuals can migrate. The dynamics of the population is controlled both by reproduction-survival and by migration. These processes take place at different time scales in the sense of the latter being much faster than the former. We incorporate the effect of demographic stochasticity into the population, which results in both dynamics (...) being modelled by multitype Bienaymé–Galton–Watson branching processes. We present a multitype global model that incorporates the effect of both processes and, making use of the existence of different time scales for demography and migration, build a reduced model in which the variables correspond to the total population in each age class. We extend previous results that relate the behavior of the original and the reduced model showing that, given a large enough separation of time scales between demography and migration, we can obtain information about the behavior of the multitype global model through the study of the simpler reduced model. We concentrate on the case where the two systems are supercritical and therefore the expected number of individuals grows to infinity, and show that we can approximate the asymptotic structure of the population vector and the asymptotic population size of the original system through the study of the reduced model. (shrink)
In this paper we will discuss the active part played by certain diagonal arguments in the genesis of computability theory. 1?In some cases it is enough to assume the enumerability of Y while in others the effective enumerability is a substantial demand. These enigmatical words by Kleene were our point of departure: When Church proposed this thesis, I sat down to disprove it by diagonalizing out of the class of the ??definable functions. But, quickly realizing that the diagonalization cannot be (...) done effectively, I became overnight a supporter of the thesis. (1981, p. 59) The title of our paper alludes to this very work, a task on which Kleene claims to have set out after hearing such a remarkable statement from Church, who was his teacher at the time. There are quite a few points made in this extract that may be surprising. First, it talks about a proof by diagonalization in order to test?in fact to try to falsify?a hypothesis that is not strictly formal. Second, it states that such a proof or diagonal construction fails. Third, it seems to use the failure as a support for the thesis. Finally, the episode we have just described took place at a time, autumn 1933, in which many of the results that characterize Computability Theory had not yet materialized. The aim of this paper is to show that Church and Kleene discovered a way to block a very particular instance of a diagonal construction: one that is closely related to the content of Church's thesis. We will start by analysing the logical structure of a diagonal construction. Then we will introduce the historical context in order to analyse the reasons that might have led Kleene to think that the failure of this very specific diagonal proof could support the thesis. This is a joint paper. We have both attempted to add a small piece to an amazing historical jigsaw puzzle at a juncture we feel to be appropiate. In the paper by Manzano 1997 the aforementioned words by Kleene were quoted, and since then several logicians, Enrique Alonso first and foremost, have questioned her on this issue. Here we both submit our reply. (1999, pp. 249--273). (shrink)
Shared agency is of central importance in our lives in many ways. We enjoy engaging in certain joint activities with others. We also engage in joint activities to achieve complex goals. Current approaches propose that we understand shared agency in terms of the more basic phenomenon of shared intention. However, they have presented two antagonistic views about the nature of this phenomenon. Some have argued that shared intention should be understood as being primarily a structure of attitudes of individual participants (...) and their interrelations (Bratman, Searle, Tuomela and Miller). Others have claimed that shared intention should be regarded as being primarily a normative transaction which gives rise to interpersonal obligations (Gilbert). In contrast to these approaches, I propose a compromise view. I argue that shared intention involves a complex socio-psychological structure which ensures, in the absence of special circumstances, the existence of relevant moral obligations. My argument involves two main steps. First, I show that shared intention includes important relations of mutual reliance between the participants. Then, I argue that the existence of these relations of mutual reliance in shared intention helps us explain why, failing special circumstances, shared intention generates those obligations. This provides, in my view, a solution to the vexed question of the relation between shared intention and interpersonal obligations. (shrink)
Este trabajo constituye una revisión de los contenidos, orientación y objetivos de una parte significativa de los manuales de lógica elemental de las décadas de 1960 y 1970 redactados por autores españoles. En concreto, analizamos los prólogos, los rudimentos prerios, y la presentación de los distintos cálculos gue aparecen en tales obras. EI estudio de la semántica, los contenidos metatcóricos o las extensiones de Ia lógica elemental quedan para una segunda etapa de esta investigacion.This work is a critical examination of (...) contents, orientation, and goals of a significative portion of elementary spanish logic textbooks in the 60’s and 70’s. It is centered on an analysis ofprefaces, preliminaries and the different kinds of calculi appearing in these books. Topics, like semantics, metatheory or extensiones of elementary logic, are left for futrher analysis. (shrink)
La Teoría de la Computación es un campo especialmente rico para la indagación filosófica. EI debate sobre el mecanicismo y la discusión en torno a los fundamentos de la matemática son tópicos que estan directamente asociados a la Teoria de la Computación desde su misma creación como disciplina independiente. La Tesis de Turing-Church constituye uno de los resultados mas característicos en este campo estando, además, lleno de consecuencias filosóficas. En este ensayo se ofrece una guía de referencia útil a aquellos (...) que desean prestar alguna atención a estos asuntos y carecen de la base técnica o histórica que se precisa. En primer lugar se ofrece un resurnen de los principales problemas relacionados con la Tesis de Turing-Church para ofrecer a continuación información sobre sus aspectos más controvertidos. Se proponen algunos problemas no resueltos y se analiza su relevancia filosófica.Computer Science is a field specially rich for philosophical inquiry. Mechanism and the discussion around foundations of mathematics are topics directly asociated to Computer Science for its very constitution as an independent discipline. Church-Turing Thesis is one of the most characteristic results in this field and is plenty of philosophical consequences. In this article I offer a referenee guide useful for those who are willing to pay some attention to these matters and ignore the technical and historical basis needed for this task. I resume the main topics related to Church-Turing Thesis and give some informationabout the most controversial aspects of this subject. Some open questions are settled for further investigation paying special attention to their philosophical importance. (shrink)
Neste artigo defendo que a Teoria da Informação Fortemente Semântica de Floridi (2004) – TIFS – está correta ao assumir a Tese da Veracidade, que por sua vez orienta a definição de informação semântica como “p é informação se e somente se p é constituído por dados bem-formados, com significado e verdadeiros”. Argumento que a teoria não é arbitrária, pois dá conta do desembaraço de conundrums filosóficos importantes, principalmente por evitar o paradoxo de Bar-Hillel e Carnap (1953), que é gerado (...) a partir da teoria clássica da informação semântica. Primeiro é discutido um dos principais resultados da teoria clássica, o de produzir “sentenças muito informativas para serem verdadeiras”. Depois são resumidas as motivações para a elaboração de uma “lógica de estar informado” e é mostrado como o sistema KTB-IL é montado e modelado mantendo-se entre os seus axiomas o da veracidade – K ou A4. Finalmente, a TIFS é examinada e defendida ao mostrar que ela restringe aleticamente a extensão do conceito clássico de informação para evitar problemas com tautologias e contradições. A TIFS oferece uma solução original ao capturar nossas intuições modais a respeito da informatividade como noção básica. (shrink)
El Estado es un concepto clave en la filosofía jurídico-política de José Ortega y Gasset (Madrid, 1883-1955). Sin embargo, resulta sorprendente que, pese a la importancia que para este autor tenía dicha noción, no haya sido estudiada con la misma profundidad e interés que otras vertientes de su pensamiento. A este respecto, basta repasar las monografías y los artículos publicados hasta la fecha sobre la figura y la obra de Ortega para constatar que, en términos cuantitativos, las investigaciones dedicadas a (...) la idea orteguiana del Estado han sido apenas testimoniales, y desde luego no son tan significativas como las que se han podido dedicar a otros temas o tópicos más conocidos de su pensamiento. Así pues, el presente libro pretende abordar el estudio de la realidad problemática del Estado en su triple dimensión histórica, sociológica y política. De acuerdo con tal propósito, esta monografía se divide en tres partes: en la primera de ellas, se estudian las instituciones políticas de Roma entendidas por Ortega como precedentes ineludibles para la formación histórica del Estado. La segunda parte de la obra versa sobre el Estado concebido como culminación de lo social, es decir, como órgano diferenciado para el ejercicio del poder público, lo cual conduce indefectiblemente hasta la Teoría de los usos sociales. Por último, la tercera parte se centra en el concepto orteguiano de Estado como forma de organización política, explica la relación que mantienen el Estado y nación en su obra, y expone las líneas principales del programa político pensado por Ortega para modernizar, regenerar y europeizar a España. (shrink)
Perspectivas: una aproximación al pensamiento ético y político contemporáneo recoge algunas de las conferencias pronunciadas en unas jornadas sobre pensamiento crítico, tituladas ¿Liquidar la Modernidad?, que tuvieron lugar en la Biblioteca María Moliner de la Facultad de Filosofía y Letras de la Universidad de Zaragoza en 2010. Y por otro lado, recopila las cuatro intervenciones que se produjeron en una jornada sobre pensamiento contemporáneo que, dirigida a profesorado de enseñanza secundaria, tuvo lugar en el Paraninfo de la Universidad de Zaragoza (...) el 26 de noviembre de 2011. El libro pretende también contribuir a establecer vínculos estrechos entre el Departamento de Filosofía y el profesorado de secundaria con el fin, entre otras cuestiones, de implicarse en la mejor preparación del alumnado de cara a la Prueba de Acceso a la Universidad y de facilitar la tarea docente del profesorado. En ese sentido, y puesto que actualizar el programa, dando cabida al siglo XX, parecía una cuestión necesaria, se ha configurado una aproximación a algunos autores y autoras contemporáneos, en la dimensión ética y/o política de su pensamiento, que también puede resultar útil para el profesorado de Filosofía en enseñanza secundaria. (shrink)
Indefinites impose an anti-uniqueness condition on their domain of quantification. The sentence in (1), for instance, cannot be felicitously uttered when it is taken for granted that John has only one friend (Hawkins 1978, 1991, Heim 1991).
Wednesday, October 10th in Research Alonso-Ovalle, Luis. 2007. Alternatives in the Disjunctive Antecedents Problem. Proceedings of the 26th West Coast Conference on Formal Linguistics. University of California, Berkeley.
"Aranguren: filosofía en la vida y vida en la filosofía" llevó por nombre la exposición sobre la figura y el legado de José Luis L. Aranguren (Ávila 1909- Madrid 1996) que pudo verse desde el 4 de junio al 26 de julio de 2009 en el Pabellón Transatlántico de la Residencia de Estudiantes de Madrid con ocasión del centenario del nacimiento del filósofo abulense.
The natural interpretation of counterfactuals with disjunctive antecedents involves selecting from each of the disjuncts the worlds that come closest to the world of evaluation. It has been long noticed that capturing this interpretation poses a problem for a minimal change semantics for counterfactuals, because selecting the closest worlds from each disjunct requires accessing the denotation of the disjuncts from the denotation of the disjunctive antecedent, which the standard boolean analysis of or does not allow (Creary and Hill, Philosophy of (...) Science 43:341–344, 1975; Nute, Journal of Philosophy 72:773–778, 1975; Fine, Mind 84(335):451–458, 1975; Ellis et al. Journal of Philosophical Logic 6:335–357, 1977). This paper argues that the failure to capture the natural interpretation of disjunctive counterfactuals provides no reason to abandon a minimal change semantics. It shows that the natural interpretation of disjunctive counterfactuals is expected once we refine our assumptions about the semantics of or and the logical form of conditionals, and (i) we assume that disjunctions introduce propositional alternatives in the semantic derivation, in line with independently motivated proposals about the semantics of or (Aloni, 2003a; Simons, Natural Language Semantics 13:271–316, 2005; Alonso-Ovalle, Disjunction in Alternative Semantics. PhD thesis, 2006); and (ii) we treat conditionals as correlative constructions, as advocated in von Fintel (1994), Izvorski (Proceedings of NELS 26, 1996), Bhatt and Pancheva (2006), and Schlenker (2004). (shrink)
La publicación de Historia y hermenéutica representa, temática y estructuralmente, una nueva invitación al diálogo. Con ocasión del octogésimo cumpleaños de Hans-George Gadamer, el metodólogo de la historia Reinhart Koselleck ofreció la conferencia 'Histórica y hermenéutica' el horizonte de la pregunta que encierra la conferencia fue abierto por Gadamer con su tentativa de respuesta 'Histórica y lenguaje'. Con todo, la descripción de un libro que invita a una lectura estructuralmente dialogal es incompleta si no se muestra, al menos sintetizadamente, el (...) tema del diálogo... En su conferencia Koselleck aborda cuál es la relación espistemológica entre Histórica —la doctrina de las condiciones de posibilidad de las historias efectuales asimiladas comprensivamente— y la hermenéutica. Koselleck sostiene que el estatus epistemológico de la Histórica la hace irreductible a un caso de hermenéutica; a fin de fundamentar esta tesis, Koselleck ofrece una definición de una teoría de la historia o Histórica y describe aquellas condiciones de posibilidad de las historias, considerando que, en conjunto, tales consideraciones revelarían una prelingüística categoría trascendental de posibles historias. (shrink)
The year of the centennial of the Argentinean writer Jorge Luis Borges is probably the right time to exhume one of the links that this universal writer had with William James. In 1945, Emece, a publisher from Buenos Aires, printed a Spanish translation of William James’s book Pragmatism, with a foreword by Jorge Luis Borges.
The aim of the present paper is to approach Juan Luis Vives' conception of freedom of the will in light of scholastic discussions on will and free choice, and point to some interesting similarities with the analysis of free choice contained in Jean Buridan's Quaestiones super decem libros Ethicorum Aristotelis ad Nicomachum.
Carminati (2002) shows that the existence of both phonetically full and phonetically null pronouns (pro) in Italian reflects a division of labor with respect to anaphora resolution. Pro prefers to link to prominent antecedents more than its phonetically overt counterpart does (where prominence is determined by syntactic position in intrasentential anaphora cases).
In the work Ser errático (Erratic Being) Luis Sáez Rueda proposes a Critical ontology of society in which the author analyses some of the most salient philosophical questions relating to different philosophical traditions, especially to phenomenology, in which he is a specialist. However, it must be said that the essay Erratic Being stands out as a clear exercise in philosophical and literary creativity. Ser errático is an essay arranged in four chapters: Phenomenology of everyday life; Erratic being, discordant being; (...) Dimensions of the event; and The life of the thought. This set of chapters sums up very simply the fundamental theses maintained by the author. Sáez Rueda also introduces into this critical ontology of society certain texts with the structure of dialogues. In these, the imagined conversation between two people renders the arguments put forward by the specialist, by the philosopher - only in a more informal register, yet without being less critical and demanding from the theoretical point of view. This literary device is clearly a nod at common sense and its ways of calling into question the most speculative assertions. (shrink)
CHAPTER I INTRODUCTION This study will deal with interpreting the moral, social and spiritual views of the famous Spanish theologian and poet, Luis de Leon. ...
Defining structural constraints on coindexing proved fruitful. Its semantic import, however, remains unclear.1 Syntactic work in the late seventies and early eighties extended the use of indexing to capture the ‘arbitrariness’ of examples like (1a) (Chomsky and Lasnik 1977, Chomsky 1980), (1b) or (1c) (Suñer 1983). The semantic import of this type of indexing is not less unclear.
The benchmark theory of conditionals maintains that conditionals quantify over a contextually restricted domain of worlds (Kratzer 1991). They are modal statements. The antecedent contributes to the interpretation of the whole conditional a proposition, a set of worlds. Conditionals quantify over a contextually restricted domain of worlds in which the proposition that the antecedent expresses is true. This is all antecedents do. In particular, the semantic import of its tense and mood inflection is neglected: it is - at most - (...) a merely formal reflection of the type of modal in the consequent (Fintel 1998; Heim 1992; Kratzer 1991). (shrink)
Nada nos exime a los hombres y mujeres de hoy de aquella advertencia paulina recaída sobre «la letra que puede matar». Juan Luis Segundo S.J, teólogo latinoamericano de la liberación, es quien con sensibilidad y lucidez ha podido detectar en el acceso de sus contemporáneos a los evangelios y, por ellos, a la figura de Jesús de Nazaret este inminente peligro. En vista de tal problemática y con el fin de actualizar un Evangelio liberador se resuelve a elaborar, en (...) su principal obra cristológica El Hombre de hoy ante Jesús de Nazaret, un extenso preámbulo hermenéutico. A él nos abocamos, como objeto de análisis del presente artículo, con el fin de sistematizar las complejas tareas hermenéuticas que propone y de establecer la originalidad de su labor teológica entendida como «anti-cristología. Contemporary men and women are not exempt form that Pauline warning about «letter that gives death». Latin American liberation theologian, Juan Luis Segundo S. J., has sensibly and brilliantly detected this imminent danger in his contemporaries access to gospel and, through it, to Jesús of Nazareth’s figure. In view of such problems and in order to update a liberating Gospel, he decides to elaborate, in his principal christological work «El Hombre de hoy ante Jesús de Nazaret», an extensive hermeneutic preamble. Such preamble is this article’s object of analysis, to which we dedicate with the purpose of systematizing the complex hermeneutic task that he proposes and to establish the originaliy of his theological work, understood as anti-christology. (shrink)
Taking for granted that Marx’s economic theory enjoys a scientific status and, furthermore, that it installed a real Copernican revolution in sociology, the present paper explores the possibility of deriving a system of law deserving the name of “scientific” in so far as it would be in keeping with the theses of the latter scientific theory. In this context, the paper argues against a claim recently sustained by Fernández Liria and Alegre Zahonero, for whom a system of right compatible with (...) Marx’s theory would be compatible, too, with the classic juridical formulations conceived during the Enlightenment. The main reason why this paper testifies against such compatibility is that the enlightened concepts of “equality”, “liberty” and “autonomy” count with the individual as the realm for their juridical application. However, Marx’s subject matter being the social means of production (and not the individuals’ production of value), we conclude that the only juridical subject that could justifiably be derived from his economic investigation would be the “social class”. Finally, the paper suggests that the only way a scientific system of law could grant a juridical status to the individual would be by taking into account the other theory that also installed a Copernican revolution in the social sciences, though this time in the field of psychology: Freud’s psychoanalysis. Key words: Copernican revolution, science, scientific. (shrink)
Se busca rastrear la imagen que Platón tiene de Heráclito y articularla con la estructura argumentativa del Cratilo, para comprender las necesidades textuales a las que responde la doctrina del flujo perpetuo, es decir, la discusión sobre la corrección (ὀρθότης) del nombre. Gracias a la inclusión del testimonio heraclíteo, resulta posible rastrear la presunta consolidación de la tesis sobre los nombres primarios y los secundarios como el eje de la separación entre dos planos de realidad (uno estable y uno móvil) (...) y de la teoría de las Ideas -es decir, como la base de la epistemología platónica presente en los diálogos de madurez-. The article seeks to trace the image Plato has of Heraclitus and connect it with the argumentative structure of the Cratylus in order to understand the textual needs that give rise to the doctrine of perpetual flux, that is, the discussion regarding the correctness (ὀρθότης) of names. The inclusion of Heraclitus's testimony makes it possible to trace the alleged consolidation of the thesis regarding primary and secondary names as the axis of separation between two levels of reality (one stable, the other, changing) and the theory of Ideas -that is, as the basis of Plato's epistemology as set forth in the late dialogues-. (shrink)
Much syntactic research on Romance, and, specifically, on Spanish, has been devoted within the GB framework to examining the properties of a class of pronominal elements involving the so-called ‘arbitrary reference’.1 Here is a sample of such constructions.
This paper analyses some aspects in Osiander’s (1498-1552) “Preface” to De Revolutionibus (1543) by Nicolaus Copernicus (1473-1453) and the “Preface Letter” also by Copernicus to the Pope Paul III (1468-1549). The reading is carried out from the intellectual framework where the works are written, taking as a reference De Disciplinis (1531) by Juan Luis Vives (1492-1538), whose pedagogical thought had great influence on the 16th century. This paper points at the coincidence of attitudes as to the function of Mathematics, (...) and therefore, of Astronomy, for both a purely probabilistic assessment of theastronomical hypotheses, and the overcoming of the instrumentality of the calculations by means of their practical use. This last channel, promoted by a sceptic academicism which was already present in the first half of the 16th century, contributes to a better understanding of the reality of the progressive acceptation of a new structure of the world. Vives has very frequently been talked of as the clear antecedent of the great masters of thought of the modern culture, but his style and the dynamics of his thought -totally Humanist- are very different from those of Copernicus and Osiander, and thus, this paper aims to analyse his cultural context and his reflections about himself. (shrink)
We present diverse evidence for the claim of Pullum and Rawlins (2007) that expressives behave differently from descriptives in constructions that enforce a particular kind of semantic identity between elements. Our data are drawn from a wide variety of languages and construction types, and they point uniformly to a basic linguistic distinction between descriptive content and expressive content (Kaplan 1999; Potts 2007).
The platonic ideas attribution into God’s mind creates a problem, namely: how to speak about “divine attributes” without put multiplicity into the divine simple substance? From this problem, this paper aims to show how Luis de Léon is between Thomas Aquinas and John Duns Scotus.
