Quine’s thesis of underdetermination is significantly weaker than it has been taken to be in the recent literature, for the following reasons: (i) it does not hold for all theories, but only for some global theories, (ii) it does not require the existence of empirically equivalent yet logically incompatible theories, (iii) it does not rule out the possibility that all perceived rivalry between empirically equivalent theories might be merely apparent and eliminable through translation, (iv) it is not a fundamental thesis (...) within Quine’s philosophy, and (v) it does not carry with it the anti-realistic consequences often associated with the thesis in recent debates. The paper analyzes Quine’s views on the matter and the changes they underwent over the years. A conjecture is put forth about why Quine’s thesis has been so widely misrepresented: Quine’s writings up to 1975 tackled primarily the formulation and justification of the thesis, but afterwards were concerned mostly with the question whether empirically equivalent rivals to the theory we hold are to be considered true also. When this latter discussion is read without bearing in mind Quine’s earlier formulation and justification of the thesis, his thesis seems to have stronger epistemic consequences than it actually does. A careful reading of his later writings shows, however, that the formulation of the thesis remained unchanged after 1975, and that his mature and considered views supported only a very mitigated version of the thesis. (shrink)

Some authors claim that ‘I’ and ‘now’ are essential indexicals, in the sense that they cannot be eliminated in favor of other indexicals or nonindexical expressions. This article argues that three indexicals of direction—one for each spatial dimension (e.g., ‘up’, ‘front’, and ‘left’)—must also be regarded essential, insofar as they are used as pure indexicals and not as demonstratives.

RESUMEN:Este trabajo tiene por objeto analizar la articulación entre la afirmación del carácter racional de la fe, esto es, su dimensión latitudinaria, el escepticismo epistemológico, y su derivación práctica en un concepto de tolerancia restringido al interior del protestantismo. Se subrayará, en este sentido, el carácter estratégico de la articulación entre racionalidad de la fe y escepticismo, en cuanto permite apelar a la ignorancia con vistas a la tolerancia, sin por ello dejar de sostener la interpretación protestante del cristianismo, en (...) detrimento de la interpretación católica.PALABRAS CLAVE:LOCKE - LATITUDINARISMO - ESCEPTICISMO - TOLERANCIA - PROTESTANTISMOABSTRACT:This paper aims to analyze the articulation between faith rationality assertion, i.e. its latitudinarian aspect, its epistemological skepticism, and its practical implication in a restricted concept of tolerance within Protestantism. In this regard, we will emphasize the strategic feature of the link between faith rationality and skepticism, as it allows appealing to ignorance towards tolerance, without dropping the Protestant interpretation of Christianity, to the detriment of Catholic interpretation.KEYWORDS:LOCKE - LATITUDINARIANISM - SKEPTICISM - TOLERATION - PROTESTANTISM. (shrink)

This paper considers the evolution of the problem of scientific rationality from Kant through Carnap to Kuhn. I argue for a relativized and historicized version of the original Kantian conception of scientific a priori principles and examine the way in which these principles change and develop across revolutionary paradigm shifts. The distinctively philosophical enterprise of reflecting upon and contextualizing such principles is then seen to play a key role in making possible rational intersubjective communication between otherwise incommensurable paradigms.

What is the difference between a researcher in philosophy and a philosopher? There are two kinds of answer that we can give to this question. We can say that the difference lies in a sort of internal quality; or, as the authors of this paper do, we can argue that a philosopher would not be a philosopher without the intervention of an ensemble of social actors such as universities, departments, funding, colleagues, editors, journals, media, and so on. In the first (...) section, referring to actor-network theory (ANT), the authors define the philosopher as a Leviathan, i.e. a macro-actor that became macro- not thanks to his/her essence, but because he/she succeeded in translating the interests of other actors. In the second section, it is introduced the notion of digital traces, and the homology between ANT and the image of the social reality we can obtain from a process of extraction, treatment, and (visual) restitution of digital traces. In particular, the authors stress the potential of a digital traces-based scientometric for studying actor-networks related to the academic world, but also its limit. In the third section, the specific case of the actor-networks related to philosopher Paul Ricoeur is considered. First, on the basis of a scientometric analysis of the digital traces contained in the bibliographic database Scopus, and secondly by extending the exploration to digital traces available on the Web via web mapping. In the conclusion, the authors affirm that the merit of their digital hermeneutics consists in bringing forward a «world of the text» which is probably less romantic, but certainly more authentic that the «world of the text» to which Ricoeur has often referred to. (shrink)

This article discusses the value of gift exchange in online social media. In the first part, the authors show how most of the commentators have considered online gifting as an alternative to the classical market economy. Yet the recent territorialization of the web challenges this perspective. As a consequence, the internet can no longer be considered a reply to capitalism. In the second part, the authors argue that in anthropology and social philosophy the term ‘gift’ has often been used improperly, (...) and that gift exchange has nothing to do with goods exchange, but with mutual recognition. In the third part, they use this definition to stress the importance of gift circulation through Facebook’s ‘Like’ button and the Twitter feature called ‘Mention’. In conclusion, the authors deal with the ‘Like economy’, i.e. the interference between gift exchange and market economy which is daily at work online. (shrink)

Este trabajo estudia críticamente seis posibles límites a la apropiación privada, individual, unilateral y desigual en el estado de naturaleza descripto por John Locke. I) la restricción expresada bajo la forma de dejar suficiente y tan bueno en común para otros; II) la prohibición del desperdicio de los frutos perecederos; III) asociada a esta segunda condición pero aplicada a la tierra, la prohibición de cercar tierra cuyos frutos se desperdicie; IV) la limitación propuesta por Macpherson, según la cual es una (...) condición de la apropiación mezclar el propio trabajo de modo personal con el objeto; V) el principio de caridad como derecho del necesitado a los medios de subsistencia; VI) la limitación que advierte Simmons, según la cual es posible derivar del principio de caridad un derecho al auto-gobierno, esto es, a no ser esclavizado a cambio de brindar, como es el deber del propietario al necesitado, los medios de subsistencia. (shrink)

On November 19, 1985, a seminar on the topic "Mind and the Brain: Philosophical Aspects" was held at the M. V. Lomonosov State University at Moscow. It was organized by the journal Philosophical Sciences [Filosofskie nauki], the Division on Scientific Method and the Philosophical Problems of Natural Science of the Philosophical Society of the USSR, the administration of the "Knowledge" [Znanie] Society of the RSFSR, and the Department of Philosophy of the Natural Science Faculties of Moscow State University. Over (...) three hundred persons participated in the seminar, ranging from students, graduate students, instructors at Moscow State University and other institutions of higher learning, to students at the Moscow University Institute for Advanced Teacher Training, associates the Institute of Philosophy of the USSR Academy of Sciences, the Institute of the History of Natural Science and Technology of the Academy of Sciences, the Academy of Social Sciences attached to the CPSU Central Committee, and the Institute of Philosophy of the Latvian SSR Academy of Sciences, etc., to representatives of the editorial boards of the journals Philosophical Sciences, Problems of Philosophy [Voprosy filosofii], The Moscow University Herald [Vestnik MGU], and members of the Scientific Method Council on Philosophy of the "Knowledge" Society of the RSFSR. The seminar attracted the attention of psychologists, physiologists, physicians, biologists, philosophers, physicists, students of literature, etc. (shrink)

In “A new proof of the completeness of the Lukasiewicz axioms” Chang proved that any totally ordered MV-algebra A was isomorphic to the segment \}\) of a totally ordered l-group with strong unit A *. This was done by the simple intuitive idea of putting denumerable copies of A on top of each other. Moreover, he also show that any such group G can be recovered from its segment since \^*}\), establishing an equivalence of categories. In “Interpretation of AF C (...) *-algebras in Lukasiewicz sentential calculus” Mundici extended this result to arbitrary MV-algebras and l-groups with strong unit. He takes the representation of A as a sub-direct product of chains A i, and observes that \ where \. Then he let A * be the l-subgroup generated by A inside \. He proves that this idea works, and establish an equivalence of categories in a rather elaborate way by means of his concept of good sequences and its complicated arithmetics. In this note, essentially self-contained except for Chang’s result, we give a simple proof of this equivalence taking advantage directly of the arithmetics of the the product l-group \, avoiding entirely the notion of good sequence. (shrink)

We review the fact that an MV-algebra is the same thing as a lattice-ordered effect algebra in which disjoint elements are orthogonal. An HMV-algebra is an MV-effect algebra that is also a Heyting algebra and in which the Heyting center and the effect-algebra center coincide. We show that every effect algebra with the generalized comparability property is an HMV-algebra. We prove that, for an MV-effect algebra E, the following conditions are mutually equivalent: (i) E is HMV, (ii) E has a (...) center valued pseudocomplementation, (iii) E admits a central cover mapping γ such that, for all p, q∈E, p∧q=0⇒γ(p)∧q=0. (shrink)

An MV-algebra A=(A,0,¬,⊕) is an abelian monoid (A,0,⊕) equipped with a unary operation ¬ such that ¬¬x=x,x⊕¬0=¬0, and y⊕¬(y⊕¬x)=x⊕¬(x⊕¬y). Chang proved that the equational class of MV-algebras is generated by the real unit interval [0,1] equipped with the operations ¬x=1−x and x⊕y=min(1,x+y). Therefore, the free n-generated MV-algebra Free n is the algebra of [0,1]-valued functions over the n-cube [0,1] n generated by the coordinate functions ξ i ,i=1, . . . ,n, with pointwise operations. Any such function f is a (...) McNaughton function, i.e., f is continuous, piecewise linear, and each piece has integer coefficients. Conversely, McNaughton proved that all McNaughton functions f: [0,1] n →[0,1] are in Free n . The elements of Free n are logical equivalence classes of n-variable formulas in the infinite-valued calculus of Łukasiewicz. The aim of this paper is to provide an alternative, representation-free, characterization of Free n. (shrink)

The aim of this paper is to focus on Arne Nass’s phenomenological method and some of its anthropological and cosmological implications. Nass’s Ecology, Community and Lifestyle, in fact, can be fruitfully read as an example of phenomenological inquiry, in which the notion of “spontaneous experience” plays a fundamental role. This method leads Nass to develop a “relational ontology,” in which the “ecological self” is seen as a “relational junction within the total field.” In addition, I show how Tymieniecka’s philosophical thought (...) can offer us the proper eco-phenomenological perspective to better understand Nass’s Ecosophy T. (shrink)

States have been introduced on commutative and non-commutative algebras of fuzzy logics as functions defined on these algebras with values in [0,1]. Starting from the observation that in the definition of Bosbach states there intervenes the standard MV-algebra structure of [0,1], in this paper we introduce Bosbach states defined on residuated lattices with values in residuated lattices. We are led to two types of generalized Bosbach states, with distinct behaviours. Properties of generalized states are useful for the development of an (...) algebraic theory of probabilistic models for non-commutative fuzzy logics. (shrink)

Comparative quantifiers, such as more than three books, cannot take scope over any quantifier in subject position if they occupy object position. This is clearly different from the behavior of other quantifiers (e.g., universal quantifiers). This paper argues that this scope puzzle is due to a more complex internal structure of comparative quantifiers than other quantifiers. In the decompositional approach that I pursue, comparative quantifiers are decomposed into two generalized quantifiers (i.e., in the case above, the comparative operator er than (...) three and the DP many books). In this approach, obligatory narrow scope of comparative quantifiers in object position is a consequence of the interplay of the independently motivated principles of grammar that also constrain other quantifiers. On the basis of the scope puzzle, I specifically argue for two constraints on Scope Shifting Operations (SSOs) a locality condition on SSOs and Scope Economy, proposed by Fox (2000), which prohibits SSOs that have no effect on semantic interpretation. Thus, I argue that the apparently peculiar facts of comparative quantifiers are, in fact, additional evidence for the core properties of SSOs. (shrink)

BL-algebras rise as Lindenbaum algebras from many valued logic introduced by Hájek [2]. In this paper Boolean ds and implicative ds of BL-algebras are defined and studied. The following is proved to be equivalent: (i) a ds D is implicative, (ii) D is Boolean, (iii) L/D is a Boolean algebra. Moreover, a BL-algebra L contains a proper Boolean ds iff L is bipartite. Local BL-algebras, too, are characterized. These results generalize some theorems presented in [4], [5], [6] for MV-algebras which (...) are BL-algebras fulfiling an additional double negation law x = x **. (shrink)

In this paper I defend the view that Berkeley endorses a spirit-idea dualism, and I explain what this dualism amounts to. Central to the discussion is Berkeley's claim that spirits and ideas are "entirely distinct." Taken as a Cartesian real distinction, the "entirely distinct" claim seems to be at odds with Berkeley's view that spirits are substances that support ideas by perceiving them. This has led commentators to deflate Berkeley's notion of "entire distinction" by reading it as analogous to the (...) categorical distinction between substance and accident. I argue that rather than taking Berkeley's notion of "entire distinction" in either of these ways, it ought to be understood as insisting upon a radical dissimilitude between spirits and ideas. This dissimilitude requires that ideas cannot be viewed as analogous to modes or accidents which inhere in a substance. Moreover, spirits and ideas cannot be understood in terms of a single, gradated scale of reality. Instead, for Berkeley spirits and ideas occupy two entirely different scales of reality and consequently the very term 'thing' applies to them in different senses. In this way, Berkeley endorses a severe dualism that occurs at the highest level of his ontology. En este trabajo defiendo que Berkeley sostiene un dualismo espíritu-idea y explico qué significa tal dualismo. Es central en la discusión la afirmación de Berkeley que los espíritus y las ideas son "totalmente distintos". Considerada como una distinción real cartesiana, la tesis "totalmente distintos" parece estar en tensión con la concepción de Berkeley de que los espíritus son sustancias que "support ideas by perceiving them". Esto ha llevado a los comentadores a disminuir la noción de Berkeley de "distinción total" leyéndola como un análogo a la distinción categorial entre sustancia y accidente. Yo argumento que en lugar de considerar a la noción de Berkeley de "distinción total"en alguno de esos modos, debe ser comprendida como insistiendo en una radical diferencia entre espíritus e ideas. Esta diferencia requiere que las ideas no se vean como análogas a modos o accidentes de la sustancia. Además espíritus e ideas no pueden ser entendidos en términos de una única escala graduada de realidad. En cambio para Berkeley espíritus e ideas ocupan dos escalas totalmente distintas de realidad y en consecuencia, el término mismo "cosa" se aplica en sentidos distintos. De este modo, Berkeley sostiene un dualismo severo que acaece al más alto nivel de su ontología. (shrink)

This paper is a contribution to the development of model theory of fuzzy logic in narrow sense. We consider a formal system EvŁ of fuzzy logic that has evaluated syntax, i. e. axioms need not be fully convincing and so, they form a fuzzy set only. Consequently, formulas are provable in some general degree. A generalization of Gödel's completeness theorem does hold in EvŁ. The truth values form an MV-algebra that is either finite or Łukasiewicz algebra on [0, 1].The classical (...) omitting types theorem states that given a formal theory T and a set Σ of formulas with the same free variables, we can construct a model of T which omits Σ, i. e. there is always a formula from Σ not true in it. In this paper, we generalize this theorem for EvŁ, that is, we prove that if T is a fuzzy theory and Σ forms a fuzzy set , then a model omitting Σ also exists. We will prove this theorem for two essential cases of EvŁ: either EvŁ has logical constants for all truth values, or it has these constants for truth values from [0, 1] ∩ ℚ only. (shrink)

In the field of many-valued logics, Hájek’s Basic Logic BL was introduced in Hájek (Metamathematics of fuzzy logic, trends in logic. Kluwer Academic Publishers, Berlin, 1998). In this paper we will study four families of n-contractive (i.e. that satisfy the axiom \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\phi^n\rightarrow\phi^{n+1}}$$\end{document}, for some \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${n\in\mathbb{N}^+}$$\end{document}) axiomatic extensions of BL and their corresponding varieties: BLn, SBLn, BLn and SBLn. Concerning BLn we have that (...) every BLn-chain is isomorphic to an ordinal sum of MV-chains of at most n + 1 elements, whilst every BLn-chain is isomorphic to an ordinal sum of MVn-chains (for SBLn and SBLn a similar property holds, with the difference that the first component must be the two elements boolean algebra); all these varieties are locally finite. Moving to the content of the paper, after a preliminary section, we will study generic and k-generic algebras, completeness and computational complexity results, amalgamation and interpolation properties. Finally, we will analyze the first-order versions of these logics, from the point of view of completeness and arithmetical complexity. (shrink)

The main aim of the paper is to solve a problem posed in Di Nola et al. (Multiple Val. Logic 8:715–750, 2002) whether every pseudo BL-algebra with two negations is good, i.e. whether the two negations commute. This property is intimately connected with possessing a state, which in turn is essential in quantum logical applications. We approach the solution by describing the structure of pseudo BL-algebras and pseudo hoops as important families of quantum structures. We show when a pseudo hoop (...) can be embedded into the negative cone of the reals. We give an equational base characterizing representable pseudo hoops. We also describe some subvarieties: normal-valued, and varieties where each maximal filter is normal. We produce some noncommutative covers and extend the area where each algebra is good. Finally, we show that there are uncountably many subvarieties of pseudo BL-algebras having members that are not good. (shrink)

How can consciousness, how can the mind be causally efficacious in a world which seems—in some sense—to be thoroughly governed by physical causality? Mental causation has been a nagging problem in philosophy since the beginning of the modern age, when, inspired by the rise of physics, a metaphysical picture became dominant according to which the manifest macrophysical world of rocks, trees, colors, sounds etc. could be eliminated in favor of, or identified with, the microconstituents of these entities and their basic (...) physical properties, plus their effects on human or animal minds. Against the background of this ontology, the argument from causal closure, or the causal completeness of physics, exerts strong pressure to also identify consciousness with microphysical entities—or even to eliminate it in favor of the latter—the only other options apparently being either the denial of the causal closure of the physical level, epiphenomenalism about the mind, or the view that its physical effects are generally overdetermined. In this paper, however, I want to introduce what I call the “microstructure view” (MV) of the brain-consciousness relation, and I want to try to make plausible that the problem of mental causation can also be solved, or perhaps rather dissolved, on the basis of this account. On the MV, the minimal neuronal correlates of consciousness—of the global state of consciousness, or specific states of consciousness such as pain—are not identical with these states, but rather constitute their microstructure, or, as I shall also say, equivalently, compose them. (shrink)

Bosbach and Riečan states on residuated lattices both are generalizations of probability measures on Boolean algebras. Just from the observation that both of them can be defined by using the canonical structure of the standard MV-algebra on the unit interval [0, 1], generalized Riečan states and two types of generalized Bosbach states on residuated lattices were recently introduced by Georgescu and Mureşan through replacing the standard MV-algebra with arbitrary residuated lattices as codomains. In the present paper, the Glivenko theorem is (...) first extended to residuated lattices with a nucleus, which gives several necessary and sufficient conditions for the underlying nucleus to be a residuated lattice homomorphism. Then it is proved that every generalized Bosbach state (of type I, or of type II) compatible with the nucleus on a nucleus-based-Glivenko residuated lattice is uniquely determined by its restriction on the nucleus image of the underlying residuated lattice, and every relatively generalized Riečan state compatible with the double relative negation on an arbitrary residuated lattice is uniquely determined by its restriction on the double relative negation image of the residuated lattice. Our results indicate that many-valued probability theory compatible with nuclei on residuated lattices reduces in essence to probability theory on algebras of fixpoints of the underlying nuclei. (shrink)

’Autobiography di J.S. Mill, pubblicata postuma nel 1873, apparse a molti come un freddo esercizio intellettuale, il resoconto del severo processo di educazione cui l’autore fu sottoposto dal padre James Mill. La pubblicazione a distanza di decenni dell’early draft di quel testo ha permesso di focalizzare meglio le circostanze in cui l’opera fu concepita. Riletto alla luce delle testimonianze coeve, in particolare il carteggio con la moglie Harriet Taylor e il diario composto da Mill nei primi mesi del 1854, (...) l’abbozzo dell’Autobiography apre nuove prospettive per inquadrare i saggi della maturità di Mill sull’etica, la religione e la società. (shrink)

Effect algebras (EAs), play a significant role in quantum logic, are featured in the theory of partially ordered Abelian groups, and generalize orthoalgebras, MV-algebras, orthomodular posets, orthomodular lattices, modular ortholattices, and boolean algebras.We study centrally orthocomplete effect algebras (COEAs), i.e., EAs satisfying the condition that every family of elements that is dominated by an orthogonal family of central elements has a supremum. For COEAs, we introduce a general notion of decomposition into types; prove that a COEA factors uniquely as a (...) direct sum of types I, II, and III; and obtain a generalization for COEAs of Ramsay’s fourfold decomposition of a complete orthomodular lattice. (shrink)

Desde fines de los 90, y siguiendo una década de severos planes de ajuste estructural, América Latina fue surcada por numerosas experiencias de revueltas populares. Estas revueltas trajeron consigo masivas manifestaciones colectivas, altos niveles de agresión física y verbal contra políticos, jueces y funcionarios públicos, en general. Las protestas incluyeron, por ejemplo, la organización de ¿piquetes¿ destinados a bloquear el tráfico en las rutas principales, con el objeto de exigir empleo, comida, o el otorgamiento de subsidios; tanto como ruidosas manifestaciones (...) (i.e., ¿cacerolazos¿). Estas agresiones a las autoridades públicas alcanzaron el domicilio y las propiedades de los últimos, tato como los edificios públicos en los que trabajaban (la sede del gobierno, las legislaturas, los tribunales). Entre otros resultados, dichas protestas forzaron la renuncia del presidente Raúl Cubas, en Paraguay, en 1999;la del presidente Alberto Fujimori, en Perú, en el 2000; la del presidente Jail Mahuuad, en Ecuador, en el 2000 (tanto como la remoción del presidente Abdala Bucaram, en 1996); la del presidente Sánchez de Lozada en Bolivia, en el 2002; y la del presidente Bertrand Aristide, en Haití, en el 2004. En la Argentina, estas protestas culminaron con una profunda crisis que incluyó el mandato de cinco presidentes distintos en menos de dos semanas. Por supuesto, esta manifestaciones fueron promovidas, en cada caso, a partir de circunstancias parcialmente diversas. Algunas fueron seguramente más legítimas que otras; algunas fueron más ¿espontáneas¿ o ¿genuinas¿ que otras; algunas resultaron más poderosas y duraderas que otras. De todos modos, la presencia de todas estas variaciones no deberían impedirnos que reconozcamos las similitudes que vincularon a estos acontecimientos, que aluden al tipo de crisis que se encuentra afectando a muchos órdenes legales contemporáneos. (shrink)

One of John Horton’s most original and significant contributions to political theory is his development and exploration of the political theory of modus vivendi. I examine what Horton understands a MV to be, what sort of theory he intends the political theory of MV to be, and why he believes a MV to be the best we can reasonably hope for. I consider how far his notion of MV matches the reality of contemporary political systems and whether ‘liberal moralism’ is (...) quite as divorced from reality or as devoid of practical consequence as his political theory of MV would have us believe. (shrink)

1. Chiarificazione e valutazione. H.L.A. Hart è stato uno dei più influenti filosofi del diritto del ventesimo secolo. In particolare nei paesi di lingua inglese, i suoi scritti sono stati a lungo il punto di riferimento per gli studiosi della disciplina. Tale opinione è largamente diffusa, anche tra coloro – e non sono pochi – che ne hanno criticato, talvolta in modo severo, i lavori. Di recente questo primato è stato messo in discussione per via della crescente attenzione suscitata (...) dal pens... (shrink)

An equivalence between the category of MV-algebras and the category \ is given in Castiglioni et al. :67–92, 2014). An integral residuated lattice with bottom is an MV-algebra if and only if it satisfies the equations \ \vee = 1}\) and \ = a \wedge b}\). An object of \ is a residuated lattice which in particular satisfies some equations which correspond to the previous equations. In this paper we extend the equivalence to the category whose objects are pairs, where (...) A is an MV-algebra and I is an ideal of A. (shrink)

An equivalence between the category of MV-algebras and the category $${{\rm MV^{\bullet}}}$$ MV ∙ is given in Castiglioni et al. :67–92, 2014). An integral residuated lattice with bottom is an MV-algebra if and only if it satisfies the equations $${a = \neg \neg a, \vee = 1}$$ a = ¬ ¬ a, ∨ = 1 and $${a \odot = a \wedge b}$$ a ⊙ = a ∧ b. An object of $${{\rm MV^{\bullet}}}$$ MV ∙ is a residuated lattice which in (...) particular satisfies some equations which correspond to the previous equations. In this paper we extend the equivalence to the category whose objects are pairs, where A is an MV-algebra and I is an ideal of A. (shrink)

Eudoro di Alessandra : testimonianze e frammenti -- [Anonimo] Commentario al Teeteto di Platone -- [Anonimo] Commentario dell'Alcibiade I di Platone -- [Anonimo] Commentario del Politico di Platone -- Gaio : testimonianze -- Albino (Prologo e testimonianze) -- Lucio : testimonianze e frammenti -- Nicostrato : testimonianze e frammenti -- Calveno Tauro : testimonianze e frammenti -- Severo : testimonianze e frammenti -- Arpocrazione : testimonianze -- Alcinoo, Didascalico -- Attico : frammenti -- Apuleio di Madaura : opere filosofiche (...) -- Celso, Discorso vero (da Origine, Contro Celso) -- Numenio di Apamea : frammenti -- Cronio : testimonianze e frammenti. (shrink)

This paper presents the data gathering of Matthew Fontine Maury at the U.S. Naval Observatory as pushing an epistemic boundary outside traditional laboratory walls. Maury's use and control of civilian navigators explicates the development of an astronomic epistemology deeply embedded in nineteenth century American society. In conclusion, following the movement of epistemic boundaries is offered as a guide to crucial moments in the development of a multifaceted modernity.

In their recent article, Glannon and Ross remind us that family members have obligations to help each other that strangers do not have. They argue, I believe correctly, that what creates moral obligations within families is not genetic relationship but rather a sharing of intimacy. For no one are these obligations stronger than they are for parents of young children. This observation leads the authors to the logical conclusion that organ donation by a parent to her child is not optional (...) but rather a prima facie duty. However, Glannon and Ross go a step further by suggesting that because parent-to-child organ donation is a duty, it cannot be altruistic. They assert that “altruistic acts are optional, nonobligatory…supererogatory…. Given that altruism consists in purely optional actions presupposing no duty to aid others, any parental act that counts as meeting a child's needs cannot be altruistic.” Here I think the authors go too far. (shrink)

Comment by Aaron L. Mackler on “‘Through Her I Too Shall Bear a Child’: Birth Surrogates in Jewish Law” by Elie Spitz Reply by Elie Kaplan Spitz Research Note by G. Scott Davis.