Quantum gravity poses the problem of merging quantum mechanics and general relativity, the two great conceptual revolutions in the physics of the twentieth century. The loop and spinfoam approach, presented in this book, is one of the leading research programs in the field. The first part of the book discusses the reformulation of the basis of classical and quantum Hamiltonian physics required by general relativity. The second part covers the basic technical research directions. Appendices include a detailed history of the (...) subject of quantum gravity, hard-to-find mathematical material, and a discussion of some philosophical issues raised by the subject. This fascinating text is ideal for graduate students entering the field, as well as researchers already working in quantum gravity. It will also appeal to philosophers and other scholars interested in the nature of space and time. (shrink)

Why do we remember the past and not the future? What does it mean for time to "flow"? Do we exist in time or does time exist in us? In lyric, accessible prose, Carlo Rovelli invites us to consider questions about the nature of time that continue to puzzle physicists and philosophers alike. For most readers this is unfamiliar terrain. We all experience time, but the more scientists learn about it, the more mysterious it remains. We think of it (...) as uniform and universal, moving steadily from past to future, measured by clocks. Rovelli tears down these assumptions one by one, revealing a strange universe where at the most fundamental level time disappears. He explains how the theory of quantum gravity attempts to understand and give meaning to the resulting extreme landscape of this timeless world. Weaving together ideas from philosophy, science and literature, he suggests that our perception of the flow of time depends on our perspective, better understood starting from the structure of our brain and emotions than from the physical universe. (shrink)

The past decades have seen a growing “philosophical” interest in a number of authors, but strangely enough Saramago’s oeuvre has been left somewhat aside. This volume aims at filling this gap by providing a diverse range of philosophical perspectives and expositions on Saramago’s work. The chapters explore some possible issues arising from his works: from his use of Plato’s allegory of the cave to his re-readings of Biblical stories; from his critique and “reinvention” of philosophy of history to his allegorical (...) exploration of alternative histories; from his humorous approach to our being-towards-death to the revolutionary political charge of his fiction. The essays here confront Saramago’s fiction with concepts, theories, and suggestions belonging to various philosophical traditions and philosophers including Plato, Pascal, Kierkegaard, Freud, Benjamin, Heidegger, Lacan, Foucault, Patočka, Derrida, Agamben, and Žižek. (shrink)

In this paper I analyze four so-called “principles of expertise”; that is, good epistemic practices that are normatively motivated by the epistemological literature on expert judgment. I highlight some of the problems that the four principles of expertise run into, when we try to implement them in concrete contexts of application (e.g. in science committees). I suggest some possible alternatives and adjustments to the principles, arguing in general that the epistemology of expertise should be informed both by case studies and (...) by the literature on the use of experts in science practice. (shrink)

The paper examines the epistemological significance of the expe- rience of estrangement caused by some types of descriptions of objects and phenomena. It shows how, today, the main productive matrix of these descriptions is formed by natural science. A distinction is drawn between a reductionist and pluralist approach to the aspect of estrangement offered by science, and subsequently analysed. The paper then puts forward an argument in support of the latter attitude.

The fragment 140 a S.-M. = G 8 Ruth. is likely to deal with two different feats of Herakles. The lines b 21–b 33 seem to concern Cycnus, an impious hero killed by Herakles by order of Apollo. The rest of the fragment seems to concern the beginning of Herakles’ expedition against Laomedon. I think Pindarus presupposes a legend according to which Herakles spent the most part of his life in Thebes; such an interpretation might explain both the obscure expression (...) πέραν ἰσϑμὸν διαβαίς and other details. The opinion the fragment belonged to the Paianes is in my view right. (shrink)

Krishnamurti et son message, sont présentés ici comme un fait nouveau et unique, concernant directement les rapports de la conscience humaine et de l'Univers. Ceux qui sentent que nous entrons dans une ère nouvelle, ne s'étonneront pas du caractère immesurable d'une telle affirmation. Directement branché sur la vie, Krishnamurti passe à travers les barrières psychiques qui emprisonnent, dans l'humain, ce phénomène extraordinaire qu'est la Conscience, aussi vaste, aussi profond que l'Univers lui-même. En un raccourci foudroyant et instantané, la conscience d'être, (...) avec lui, échappe à ses conditionnements. Aussi bien, il est temps d'affirmer qu'il est le messager de l'époque, l'esprit de vérité qui éclairera les siècles à venir. (shrink)

Is deduction of use in application to our everyday problems? Aristotle said that in practical matters we cannot use a strictly deductive attitude: "we must be content...in speaking about things which are only for the most part true, with premises of the same kind, to reach conclusions that are no better" (Nic.Eth.I,4 - my underlining). We may content ourselves with conclusions which - according to the usual views - are not true; but what happens when we realize that such conclusions (...) bring us into contradiction with some of our deepest beliefs? We have to pursue our search of rationality in the most compelling manner, and this effort forces us to express our background beliefs in order to check what may be wrong with that. In this paper I will give two classical examples, one form the history of cinema and another from the history of artificial intelligence: in comparing these two examples I claim that logical compulsion - the deep need for convention - is highly valuable where feelings are not enough. (shrink)

Dans le livre Λ de la Métaphysique, en accord avec sa thèse fondamentale de la primauté ontologique de l’individu sur l’universel, Aristote refuse d’attribuer le statut de substances immatérielles et de principes premiers de la réalité aux Formes platoniciennes et aux Nombres de la tradition académicienne. Il croit que ces principes platoniciens – selon lui des universels privés de vie – doivent être remplacés par une série d’êtres vivants, d’individus doués d’intelligence, en activité contin...

A correction to this paper has been published: https://doi.org/10.1007/s10701-021-00451-y.

This is a contribution to a book on quantum gravity and philosophy. I discuss nature and origin of the problem of quantum gravity. I examine the knowledge that may guide us in addressing this problem, and the reliability of such knowledge. In particular, I discuss the subtle modification of the notions of space and time engendered by general relativity, and how these might merge into quantum theory. I also present some reflections on methodological questions, and on some general issues in (...) philosophy of science which are are raised by, or a relevant for, the research on quantum gravity. (shrink)

Nel breve spazio del presente lavoro, intendo dar conto dell’“habitus teologico” che caratterizza lo stile filosofico di Alasdair MacIntyre : “religiously musical” è infatti — a mio avviso — il più insolito, e allo stesso tempo il più suadente, epiteto attribuito al filosofo scozzese dai teologi James Gustafson e Stanley Hauerwas. Tale habitus è altresì esaltato dalla diffusa propensione a saldare insieme — senza apparente soluzione di continuità — il modus philosophandi macintyriano e alcune recenti figure della teologia cristiana post–liberale (...) e post–moderna, di cui ci occuperemo in seguito: soprattutto la “teologia narrativa” di Hans Frei, George Lindbeck, et. al., ma anche la “radical orthodoxy” di John Milbank, Catherine Pickstock, Graham Ward, et. al. Sebbene MacIntyre non abbia replicato direttamente a simili tentativi di “appropriazione teologica” del suo pensiero, ritengo, comunque, che i tempi siano maturi per riconoscere — a lui e al “tomismo analitico” — un ruolo sui generis nell’evoluzione della tradizione aristotelico–tomista del XX secolo : ruolo distinto, ma non separato, rispetto a quello coevo di quanti — in ambito continentale — hanno tenacemente proseguito la ricerca filosofica e teologica nel solco di Tommaso, come ad esempio Marie–Dominique Chenu, Yves Congar, Cornelio Fabro, Etienne Gilson, Jacques Maritain, Edith Stein, et al. (shrink)

The moral and political philosophy of Wilhelm Röpke is among the finest instances of European classical liberalism in the twentieth century, and in many occasions he stated that only a society which understands the importance of markets can be reconciled with human dignity. Röpke elaborated a political theory that focused on the harmony between moral principles and economic law. In this sense, his liberalism is unique not only because it defends private property and competition as pillars of a thriving economy, (...) but above all that it provides the preconditions of a society that can remain secure from the immorality of despotism and subsequent ethical degeneration. To that end he upheld an economic order based on voluntary cooperation as the basis for a more humane society, emphasizing the role of institutional competition and federalism. Röpke’s cultural conservatism should not therefore be misunderstood, as it is very much connected with his defense of the essential role of property. It is only in this sense that he found in liberal humanism a third way, which is not however situated halfway between the market and socialism, but which represents instead a defense of a competitive society that is aware of its own historical and cultural basis. (shrink)

The aim of this paper is to demonstrate that the tragic poets of the fifth century BC used an engine called ekkyklema in order to reveal the scenes supposed to take place inside. I think I can indicate a passage, that clearly demonstrates the use of such an engine (Eur. Her. 1028 ff.), since the chorus’ words are otherwise unintellegibile. Comic poets used this engine only for paratragic purpose, because the distinction inside/outside was not relevant for comedy.

The European Legacy, Volume 17, Issue 5, Page 707-708, August 2012.

One of the world's most renowned theoretical physicists, Carlo Rovelli has entranced millions of readers with his singular perspective on the cosmos. In Helgoland, Rovelli examines the enduring enigma of quantum theory. The quantum world Rovelli describes is as beautiful as it is unnerving. Helgoland is a treeless island in the North Sea where the 21-year-old Werner Heisenberg first developed quantum theory, setting off a century of scientific revolution. Full of alarming ideas (ghost waves, distant objects that seem to (...) be magically connected, cats that appear both dead and alive), quantum physics has led to countless discoveries and technological advancements. Today our understanding of the world is based on this theory, yet it is still profoundly mysterious. As scientists and philosophers continue to fiercly debate the theory's meaning, Rovelli argues that its most unsettling contradictions can be explained by seeing the world as fundamentally made of relationships, not substances. We and everything around us exist only in our interactions with one another. This bold idea suggests new directions for understanding the structure of reality and even the nature of consciousness. Rovelli makes learning about quantum mechanics an almost psychedelic experience. Shifting our perspective once again, he takes us on a riveting journey through the universe so we can better understand our place in it. (shrink)

This paper is a comparison of Kripke’s and Künne’s interpretations of Frege’s theory of indexicals, especially concerning Frege’s remarks on time as “part of the expression of thought”. I analyze the most contrasting features of Kripke’s and Künne’s interpretations of Frege’s remarks on indexicals. Subsequently, I try to identify a common ground between Kripke’s and Künne’s interpretations, and hint at a possible convergence between those two views, stressing the importance given by Frege to nonverbal signs in defining the content of (...) thought. I conclude by indicating a possible direction for further research. (shrink)