We show the existence of Lorentz invariant Berry phases generated, in the Stueckelberg–Horwitz–Piron manifestly covariant quantum theory (SHP), by a perturbed four dimensional harmonic oscillator. These phases are associated with a fractional perturbation of the azimuthal symmetry of the oscillator. They are computed numerically by using time independent perturbation theory and the definition of the Berry phase generalized to the framework of SHP relativistic quantum theory.

Hormonal changes associated with the human menstrual cycle have been previously found to affect female mate preference, whereby women in the late follicular phase of their cycle (i.e., at higher risk of conception) prefer males displaying putative signals of underlying genetic fitness. Past research also suggests that romantic kissing is utilized in human mating contexts to assess potential mating partners. The current study examined whether women in their late follicular cycle phase place greater value on kissing at times when it (...) might help serve mate assessment functions. Using an international online questionnaire, results showed that women in the follicular phase of their menstrual cycle felt that kissing was more important at initial stages of a relationship than women in the luteal phase of their cycle. Furthermore, it was found that estimated progesterone levels were a significant negative predictor for these ratings. (shrink)

The contemporary view of the fundamental role of time in physics generally ignores its most obvious characteric, namely its flow. Studies in the foundations of relativistic mechanics during the past decade have shown that the dynamical evolution of a system can be treated in a manifestly covariant way, in terms of the solution of a system of canonical Hamilton type equations, by considering the space-time coordinates and momenta ofevents as its fundamental description. The evolution of the events, as functions of (...) a universal invariant world, or historical, time, traces out the world lines that represent the phenomena (e.g., particles) which are observed in the laboratory. The positions in time of each of the events, i.e., the time of their potential detection, are, in this framework, controlled by this universal parameter τ, the time at which they are generated (and may proceed in the positive or negative sense). We find that the notion of thestate of a system requires generalization; at any given τ, it involves information about the system at timest(τ) ≠ τ. The correlation of what may be measured att(τ) with what is generated at τ is necessarily quite rigid, and is related covariantly to the spacelike correlations found in interference experiments. We find, furthermore, that interaction with Maxwell electromagnetism leads back to a static picture of the world, with no real evolution. As a consequence of this result, and the requirement of gauge invariance for the quantum mechanical evolution equation, we conclude that electromagnetism is described by a pre-Maxwell field, whose τ-integral (or asymptotic behavior as τ → ∞) may be identified with the Maxwell field. We therefore consider the world of events in space time, interacting through τ-dependent pre-Maxwell fields, as far as electrodynamics is concerned, as the objective dynamical reality. Our perception of the world, through laboratory detectors and our eyes, are based onintegration over τ over intervals sufficiently large to obtain an aposteriori description of the phenomena which coincides with the Maxwell theory. Fundamental notions, such as the conservation of charge, rest on this construction. The decomposition of the common notion of time into two essentially different aspects, one associated with an unvarying flow, and the second with direct observation subject to dynamical modification, has profound philosophical consequences, of which we are able to explore here only a few. (shrink)

Recently, in the framework of a relativistic quantum theory with invariant evolution parameter, solutions have been found for the two-body bound state, whose mass spectrum agrees with the nonrelativistic Schrödinger energy spectrum. In this paper, we study the radiative transitions of these states in the dipole approximation and find that the selection rules are identical with those of the usual nonrelativistic theory, expressed in a manifestly covariant form. In addition to the transverse and longitudinal polarizations of the nonrelativistic theory, we (...) find a “scalar” transition, induced by the relative time coordinate, which is of the same type as the longitudinal transition, expressing the Lorentz covariance of the theory. (shrink)

Gauge invariance of a manifestly covariant relativistic quantum theory with evolution according to an invariant time τ implies the existence of five gauge compensation fields, which we shall call pre-Maxwell fields. A Lagrangian which generates the equations of motion for the matter field (coinciding with the Schrödinger type quantum evolution equation) as well as equations, on a five-dimensional manifold, for the gauge fields, is written. It is shown that τ integration of the equations for the pre-Maxwell fields results in the (...) usual Maxwell equations with conserved current source. The analog of the O (3, 1) symmetry of the usual Maxwell theory is found to be O (3, 2) or O (4, 1), depending on the space-time Fourier spectrum of the field. We argue that the structure that is relevant to the description of radiation in interaction with matter evolving in a timelike sense is that of O (3, 2). The noncovariant form of the field equations is given; there are two fields of electric type and one (divergenceless) magnetic type field. The Noether currents are studied, and some remarks are made on second quantization. (shrink)

Computer vision research involving street and road detection methods usually focuses on driving assistance and autonomous vehicle systems. In this context, street segmentation occurs in real-time, based on images centered on the street. This work, on the other hand, uses street segmentation for urban planning research to classify pavement types of a city or region, which is particularly important for developing countries. For this application, it is needed a dataset with images from various locations for each street. These images are (...) not necessarily centered on the street and include challenges that are not common in street segmentation datasets, such as mixed pavement types and the presence of faults and holes on the street. We implemented a multi-class version of a state-of-the-art segmentation algorithm and adapted it to perform street pavement classification, handling navigation along streets and angle variation to increase the accuracy of the classification. A data augmentation approach is also proposed to use preliminary results from the test instances as new ground truth and increase the amount of training data. A dataset with more than 300,000 images from 773 streets from a Brazilian city was built. Our approach achieved a precision of 0.93, showing the feasibility of the proposed application. (shrink)

The volume addresses a variety of issues on Stance and Inter/Subjectivity, and the expression of Identity in discourse. It focuses on the multifaceted nature of stance, and the use of resources of epistemicity, effectivity, and evaluation and metaphor, as well as other dimensions within the domain of stance, such as mirativity, emotion and attribution. In this way it provides a more in-depth and a wider perspective into the nature of stance. The contributions feature the use of stance resources in several (...) languages, and in various discourse domains and genres, such as oral discourse, political and newspaper discourse, and science popularization and medical research articles, as well as online fora on social issues, mental health and peer support platforms. (shrink)

Realizamos una descripción de las acuñaciones de Muḥammad I; en ellas y partiendo de la continuidad de estilo con las llevadas a cabo por el emir ‘Abd al-Raḥmān II, encontramos un período de transición durante los quince primeros años del reinado que se prolongan hasta veintiuno en el caso de las monedas de la serie del 239 al 259 h. presentada en último lugar. En una segunda etapa, iniciada en 250 h., se aumenta el módulo de los dírhams dejando un (...) mayor espacio para las inscripciones y dibujos con los que se decoran las dos áreas de las monedas, mejora que llega hasta finales del emirato, y claro exponente de un movimiento artístico incipiente y que tuvo durante el califato su mayor desarrollo artístico. (shrink)

Del espíritu y el corazón de la autora del presente tomo básteme comunicar un rasgo a mis lectores: ella misma me exigió que en mi prólogo me abstuviese de elogiarla, complaciéndose sobremanera en mi idea de consagrarlo a estimular a un sexo en los esfuerzos de la inteligencia aplicados al desarrollo y mejoramiento de la sociedad; y a vindicar a este contra el funesto e irreflexivo desdén con que los hombres y las mujeres mismas, sobre todo en ciertos países, suelen (...) pagar sus bien intencionadas producciones. Esta colección es, desde luego, sólo una muestra de lo que la señora del Valle puede hacer, y faltan en ella dos poesías sobresalientes que acaba de escribir con motivo del Centenario del libertador. Prólogo de Rafael Pombo. En Agripina Montes del Valle (1883), Poesías, Tomo I (pp. III-LII). Zalamea Hermanos. Versión digital: https://catalogoenlinea.bibliotecanacional.gov.co/client/es_ES/search/asset/62879/0. (shrink)

Reasons for action is a widely employed methodology in practical philosophy, and especially in moral philosophy. Reasons are facts that explain and justify actions. But, conceptually, if reasons were causes, incontinent actions would be impossible. When an agent ranks an evaluation about what to do as his best judgement, it entails that he has a reason for acting as that judgement prescribes. But when an agent acts incontinently, he acts in accordance to an intention that is not aligned with his (...) best evaluative judgement. Yet, if the agent’s best evaluative judgement provides him a reason for action, this reason should also be his strongest reason, and therefore, the strongest cause. How then can it be possible that an agent incontinently acts according to a reason of inferior causal strength? In this paper, I analyze how Davidson’s argument for the possibility of incontinent actions interacts with his causal theory of actions. I argue that Davidson’s proposal does not fully respect the two principles of intentional rationality, that he himself claims to be compelling. Lastly, I sketch some initial steps that might be helpful to drawing more precise conceptual distinctions in terms of the rationality of incontinent actions. (shrink)

What is the nature of number systems and arithmetic that we use in science for quantification, analysis, and modeling? I argue that number concepts and arithmetic are neither hardwired in the brain, nor do they exist out there in the universe. Innate subitizing and early cognitive preconditions for number— which we share with many other species—cannot provide the foundations for the precision, richness, and range of number concepts and simple arithmetic, let alone that of more complex mathematical concepts. Numbers and (...) arithmetic, and mathematics in general, have unique features—precision, objectivity, rigor, generalizability, stability, symbolizability, and applicability to the real world—that must be accounted for. They are sophisticated concepts that developed culturally only in recent human history. I suggest that numbers and arithmetic are realized through precise combinations of non-mathematical everyday cognitive mechanisms that make human imagination and abstraction possible. One such mechanism, conceptual metaphor, is a neurally instantiated inference-preserving cross-domain mapping that allows the conceptualization of abstract entities in terms of grounded bodily experience. I analyze how the inferential organization of the properties and “laws” of arithmetic emerge metaphorically from everyday meaningful actions. Numbers and arithmetic are thus—outside of natural selection—the product of the biologically constrained interaction of individuals with the appropriate cultural and historical phenotypic variation supported by language, writing systems, and education. (shrink)

The purpose of this paper is to address some of the questions on the notion of agent and agency in relation to property and personhood. I argue that following the Kantian criticism of Aristotelian metaphysics, contemporary biotechnology and information and communication technologies bring about a new challenge—this time, with regard to the Kantian moral subject understood in the subject’s unique metaphysical qualities of dignity and autonomy. The concept of human dignity underlies the foundation of many democratic systems, particularly in Europe (...) as well as of international treaties, including the Universal Declaration of Human Rights. Digital agents, artificial organisms as well as new capabilities of the human agents related to their embeddedness in digital and biotechnological environments bring about an important transformation of the human self-appraisal. A critical comparative reflection of this transformation is important because of its ethical implications. I deal first with the concept of agent within the framework of Aristotelian philosophy, which is the basis for further theories in accordance with and/or in opposition to it, particularly since modernity. In the second part of this paper, I deal with the concept of personhood in Kantian philosophy, which supersedes the Aristotelian metaphysics of substance and builds the basis of a metaphysics of the moral human subject. In the third part, I discuss the question of artificial agents arising from modern biology and ICT. Blurring the difference between the human and the natural and/or artificial opens a “new space” for philosophical reflection as well as for debate in law and practical policy. (shrink)

This article offers a new reading of Heidegger's thesis of the animal in The Fundamental Concepts of Metaphysics. Framing Heidegger's text through a brief analysis of Protagoras' genetic story of nature and of man's nature in Plato's eponymous dialogue, our reading brings out three key elements common to both texts: living nature as a normative rather than a physical order, the poverty of man's world in relation to the animal, and the attempted redemption of the latter through the acquisition of (...) Weltbildung. Staying with the way Heidegger brings out man's poverty in world in the text allows us (i) to undo once for all the oft-repeated charge of Heidegger's anthropocentric interpretation of the animal, (ii) to stage the hypothesis that philosophy and the life sciences of his day draw upon a common basic experience of the autonomy of life in relation to everything human, all-too-human, and (iii) to demonstrate the normativity and poverty of life. (shrink)

_ Source: _Volume 47, Issue 3, pp 366 - 387 In this article, I focus on Heidegger’s conception of hospitality in his first and final lectures on Hölderlin’s _Germania_, _Remembrance_, and _The Ister_. I argue that the hospitality of the foreigner for Heidegger is the condition of possibility of dwelling understood as the happening of history.In the first section I analyze the notions of hospitality in Levinas and Derrida. The second section unpacks some of the senses of the earth in (...) Heidegger as the site of man’s historical dwelling, whereas in the third section I focus on holy mourning as the disposition that reveals the earth as the uncanny ground of history. In the final section, I spell out Heidegger’s conception of hospitality, the greeting, and the foreign guest. (shrink)

This volume has 41 chapters written to honor the 100th birthday of Mario Bunge. It celebrates the work of this influential Argentine/Canadian physicist and philosopher. Contributions show the value of Bunge’s science-informed philosophy and his systematic approach to philosophical problems. The chapters explore the exceptionally wide spectrum of Bunge’s contributions to: metaphysics, methodology and philosophy of science, philosophy of mathematics, philosophy of physics, philosophy of psychology, philosophy of social science, philosophy of biology, philosophy of technology, moral philosophy, social and political (...) philosophy, medical philosophy, and education. The contributors include scholars from 16 countries. Bunge combines ontological realism with epistemological fallibilism. He believes that science provides the best and most warranted knowledge of the natural and social world, and that such knowledge is the only sound basis for moral decision making and social and political reform. Bunge argues for the unity of knowledge. In his eyes, science and philosophy constitute a fruitful and necessary partnership. Readers will discover the wisdom of this approach and will gain insight into the utility of cross-disciplinary scholarship. This anthology will appeal to researchers, students, and teachers in philosophy of science, social science, and liberal education programmes. 1. Introduction Section I. An Academic Vocation Section II. Philosophy Section III. Physics and Philosophy of Physics Section IV. Cognitive Science and Philosophy of Mind Section V. Sociology and Social Theory Section VI. Ethics and Political Philosophy Section VII. Biology and Philosophy of Biology Section VIII. Mathematics Section IX. Education Section X. Varia Section XI. Bibliography. (shrink)

The recently celebrated division into ‘easy’ and ‘hard’ problems of consciousness is unfortunate and misleading. Built on functionalist grounds, it carves up the subject matter by declaring that the most elusive parts need a fundamentally and intrinsically different solution. What we have, rather, are ‘difficult’ problems of conscious experience, but problems that are not difficult per se. Their difficulty is relative, among other things, to the kind of solution one is looking for and the tools used to accomplish the task. (...) I argue that the study of conscious experience in our scientific and philosophical tradition is a very difficult problem because it has been addressed with inappropriate tools: with harmful long-lasting and inadequate dogmas that have dogged science for centuries. I describe five of these dogmas, which are: the existence of an objective reality independent of human understanding; the subordination of epistemology to ontology; the restricted view of the objectivist-subjectivist dichotomy; the exclusion of the body from the study of the mind; and the idea of explaining the mind in terms of the neurophysiological processes of individual brains. I claim that conscious experience is not a transcendental, paranatural, mystic or magic phenomenon. It is tractable and approachable with scientific methods. However, one must look not only for non-reductionist views to approach it, but also for views that avoid the dogmas here described. Conscious experience is a living phenomenon and it has to be understood as such. Accordingly, our understanding of it has to make sense at several levels, from evolution to morphophysiology, from neuroanatomy to language. I put forward an approach to conscious experience which is free of the dogmas that make the study of conscious experience so difficult. This view, called ecological naturalism, is a non-functionalist and non-reductive view that provides an naturalistic account of the mind. It also puts special emphasis on irreducible supra-individual biological processes that are essential in the realization of mental phenomena and therefore conscious experience. (shrink)

Paragraphs §§ 108-133 of Wittgenstein's Philosophical Investigations seems to contain reminders about what we should and should not do when we do philosophy: we should neither present theories (§109) nor interfere with the actual use of language (§124); we should, on the other hand, bring the words back from their metaphysical use to their everyday use (§116) and simply present things, without explaining them (§126). But if the correct way of doing philosophy is just to describe what lies open to (...) view, what justifies those normative considerations? If everything he has to offer are descriptions, how can he make considerations about philosophy to which the philosophical tradition apparently does not comply? We will argue that these passages do contain methodological recommendations. Those, however, are not the immediate result of the application of the method, i.e., they are not something we discover about philosophy by employing the method itself. The methodological considerations are justified because they are the result of a reliable process of deliberation. What makes the deliberative process reliable is the fact that the application of the method provides us with an accurate description of the goal that the philosophical practice traditionally has in view, thus enabling us to deliberate correctly. (shrink)

In this I draw attention to the strangeness (atopia) that Plato’s Republic has not only for Plato’s contemporaries, but also for us. This strangeness for us consists of the fact that Plato’s Republic does not allow for a plurality of philosophical opinions, but enforces one true philosophy (philosophia alêthê) or one conception of the Good to all citizens. The platonic Republic describes not only a state, but also a kind of pre-Christian church. Second, I emphasize that the Socratic principle in (...) which every soul does everything for the Good (panta prattei) can be translated in two ways: Every soul does everything for the sake of the Good, or goes to all lengths for the sake of the Good. Depending on the different translations, we have a different picture of the platonic Socrates in the Republic, an intellectualiste Socrates for whom irrational desires do not exist, or a Socrates who also accepts irrational desires. Third, I discuss the laughter after Socrates’ claim that the Good is even “beyond being”. Who here is laughing about whom, Glaucon about Socrates, or Socrates about Glaucon, or perhaps Plato about himself? (shrink)

When I pretended during my early youth what it might be like to practice medicine, I did not dream of the satiny images and pearly white smiles from the Marcus Welby reruns I faithfully watched on television, nor did I fantasize about getting behind the wheel of the gleaming cherry red Mercedes convertible my uncle the psychiatrist drove to my family's frequent gatherings. Money and medicine, though somehow clearly linked, were to me incalculably unrelated. The power of doctors rested in (...) their ability to heal the human beings in whom they recognized themselves wherever they touched them. The legendary country doctor of bygone years who took care of anyone (rich or poor) in the neighborhood who fell ill, crossed with a daring and sweaty guerrilla resisting his corrupt government from the distant reaches of a Latin American Jungle: this chimera was the warrior-physician I secretly aspired to be. (shrink)

Despite the fact that Aristotle and Frege/Russell differ in how to understand the ambiguity in the meaning of the word “is”, their theories share a common feature: “is” does not have a normative meaning. This paper, however, (I) shows (a) that there is a normative meaning of “is” (and correspondingly a constative meaning of the word “ought”) and (b) that the ambiguity of “is” is itself ambiguous. Furthermore, it proposes (c) a performative criterion for making a distinction between constative and (...) normative “is”. Thereby, (II) a new interpretation of Kant’s critique of the ontological argument (CPR A 598/B626) makes sense: The difference between being as a real predicate and being as a position depends on the difference between “is” as a descriptive and “is” as a normative predicate. (III) The criterion also makes possible a new answer to Leibniz’s and Schelling’s question, “Why is there something rather than nothing?”: The “is” in “there is something” is normative and the question means “Why shall there be something rather than nothing?”. As “there shall be nothing” is self-refuting, the question evokes an ultimate foundation in a practical sense. (shrink)

By Belief Revision it is understood a system that logically explains the rational process of changing beliefs by taking into account a new piece of information. The most influential approach in this field of study, the AGM system, proposed by Alchourrón, Gärdenfors, and Makinson, postulates rationality criteria for different types of belief change. In this paper I shall assess the relationship between those criteria and argue for an opposition between the principles of Information Economy and Consistency. Furthermore, I shall argue (...) that Paraconsistent Belief Revision manages to minimise this friction in the best possible way. (shrink)

Since the publication and reception of Levinas’s critique of Heidegger, it has become standard practice among some authors to argue that Heidegger’s thinking of being, both early and late, is an insistent meditation on the alterity of the self in the call of conscience and the alterity of being in relation to beings, and that this thought is consequently already ‘ethical’. This line of argument has been recently pursued by Dastur, Raffoul, and Ricoeur. None of them contests that there is (...) a difference between the alterity of the self and the alterity of the other. But they argue that the experience of the first is the condition of possibility of gaining access to the second. There are several reasons why I have failed to be convinced by this argument. In this paper, I spell out those reasons and argue that Ricoeur’s attempt to carve out a path between Heidegger and Levinas remains unsuccessful. (shrink)

This essay presents a defence of the hermeneutical and existential standpoint of Being and Time against Cristina Lafont’s historicist and relativist reading. I show that there are substantive and textual difficulties with the Kantian reading of the understanding of being she endorses, which leads her to ignore the existential and hermeneutical aspects of Heidegger’s theory of meaning. The first section shows that the understanding of being is neither an unrevisable synthetic apriori nor a historically contingent conceptual scheme but that it (...) originates from care and that its articulation depends on the disclosure of a world . The second section turns to Heidegger’s theory of meaning qua worldhood. In the first place, I demonstrate that the relativity of meaning to Dasein doesn’t entail the kind of relativism Lafont ascribes to Heidegger and, in the second, how it avoids the supposed tension Lafont identifies in Being and Time between the claim that Dasein constitutes the world and the claim that it depends on a historically and linguistically constituted world. I conclude with some remarks on what is novel about Heidegger’s existential and hermeneutical outlook on meaning. (shrink)

This piece provides a general overview and analysis of the current imperative to decolonize in South Africa, linking the recent turn to identity politics with the transformation of the university i...

This article examines the primacy of real-world bodily experience for understanding the human mind. I defend the idea that the peculiarities of the living human brain and body, and the bodily experiences they sustain, are essential ingredients of human sense-making and conceptual systems. Conceptual systems are created, brought forth, understood and sustained, through very specific cognitive mechanisms ultimately grounded in bodily experience. They don't have a transcendental abstract logic independent of the species-specific bodily features. To defend this position, I focus (...) on a case study: the fundamental concept of time flow. Using tools of cognitive linguistics, I analyse the foundations of this concept, as it is manifested naturally in everyday language. I show that there is a precise conceptual metaphor whose inferential structure gives an account of a huge variety of linguistic expressions, semantic contents, and unconscious spontaneous gestures: Time Events Are Things In Space. I discuss various special cases of this conceptual metaphor. This mapping grounds its source domain in specific spatial bodily experiences and projects its inferential structure onto a target domain making inferences in that domain possible. This mechanism allows us to unconsciously, effortlessly, and precisely understand expressions such as ‘the year 2000 is approaching’ or ‘the days ahead of us’. The general form of the mapping seems to be universal. The analysis raises important issues which demand a deeper and richer understanding of cognition and the mind: a view that sees the mind as fully embodied. In order to avoid misunderstandings with a general notion of ‘embodiment’ which has become fashionable in contemporary cognitive science, I describe what I mean by ‘full embodiment’: an embodied-oriented approach that has an explicit commitment to all of cognition, not just to low-level aspects of cognition such as sensory-motor activity or locomotion . I take embodiment to be a living phenomenon in which the primacy of bodily grounded experience is inherently part of the very subject matter of the study of the mind. (shrink)

The target article criticises neural-symbolic systems as inadequate for analogical reasoning and proposes a model of analogy as transformation (i.e., learning). We accept the importance of learning, but we argue that, instead of conflicting, integrated reasoning and learning would model analogy much more adequately. In this new perspective, modern neural-symbolic systems become the natural candidates for modelling analogy.

This paper deals with the deuteros plous, literally ‘the second voyage’, proverbially ‘the next best way’, discussed in Plato’s Phaedo, the key passage being Phd. 99e4-100a3. I argue that (a) the ‘flight into the logoi’ can have two different interpretations, a standard one and a non-standard one. The issue is whether at 99e-100a Socrates means that both the student of erga and the student of logoi consider images (‘the standard interpretation’), or the student of logoi does not consider images but (...) that “consistency should suffice for truth” (‘the non-standard interpretation’); (b) the non-standard one implies the problem of the hypothesis, a problem analogous to the problem of the elenchus; (c) there is a structural analogy between Descartes’ ontological argument for the existence of God in his 5th Meditation and the final proof for the immortality of the soul in the Phaedo. (shrink)

In this paper, I survey and defend the use of quantitative methods in philosophy of language. Quantitative methods in philosophy of language include a wide variety of methods, ranging from model‐based techniques (computer simulations and mathematical models) to data‐driven approaches (experimental philosophy and corpus‐based studies). After offering a few case studies of these methodologies in action, I single out some debates in philosophy of language that are especially well served by their use. These are cases in which quantitative methods increase (...) precision, improve the accuracy and reliability of results, and allow philosophers of language to borrow from other fields the best epistemic practices available. I conclude with some far‐reaching considerations about the role of qualitative and quantitative methods in debates about philosophical methodology. (shrink)

The debate over Plato’s “ so called unwritten doctrines”, which he communicated only to a small circle of trusted disciples, has caused a stir among philosophers in recent decades. Rafael Ferber assumes a differentiated position in this controversy. He is convinced that the unwritten doctrines did exist, but that Plato, for reasons inherent in the process of gaining knowledge, was unable to communicate these doctrines even to his closest disciples. In this book, Ferber outlines the discussion and summarizes the (...) standpoints of greatest interest. Ever since Aristotle, we have known that Plato did not put his most important teachings into writing, but instead communicated them only orally to the inner circle of his disciples. While the extant dialogues merely pass down Plato’s “exoteric” doctrines, his most important “esoteric” insights were not meant for the general public. In the meantime, the contents and the significance of Plato’s “unwritten doctrines” have become the subject of debate in philosophical circles. Fifteen years ago, at the height of the controversy over the “unwritten doctrines”, Rafael Ferber entered the fray with a small book. He proposed that Plato was also unable to communicate the “unwritten doctrines” because the highest principles (i.e. the subject of the unwritten doctrines) cannot be known through logical operations due to an epistemological paradox. Ferber’s differentiated position met with great respect and acceptance, although in individual cases it was also rejected. Ferber’s new book again presents the text of 1991, but significantly expands on it through new perspectives and an outline of the discussion it triggered. In this book, the reader learns what is meant by Plato’s unwritten doctrines and what the controversy is all about. (shrink)

In the whole Corpus Platonicum, we find in principle only one "direct argument" (Charles Kahn) for the existence of the ideas (Tim.51d3-51e6). The purpose of the article is to analyse this argument and to answer the question of why Plato in the Timaeus again defended the existence of the ideas despite the objections in the Parmenides. He defended it again because the latent presupposition of the apories in the Parmenides, the substantial view of sensibles, is removed through the introduction of (...) space as "substantialized extension". First (I) it is shown that Plato remained in dialogues, like the Sophist and Politicus, faithful to the "theory of ideas" despite his criticism in the Parmenides. The common theme in the trilogy of the Theaetetus, Sophist and Politicus is to refute relativism by showing that any relativism presupposes something absolute that is something like the "theory of ideas". The second part of the paper (II) examines closely the logical structure of the argument for the existence of ideas in the Timaeus (51d3-52a7). The third part (III) shows how this argument can avoid the criticism of ideas in the Parmenides. In the Parmenides, sensibles are treated as substantial entities. But, as the Timaeus shows, sensibles are not substantial entities but merely qualities, namely qualities of space, which is the only substance in the sensible world. A shortened English version of the paper appeared in Proceedings of the Fourth Symposium Platonicum, Granada, Selected papers, ed. by T. Calvo/L. Brisson, Academia Verlag, St. Augustin, 1997, 179-186. -/- But the only "direct argument" (Tim.51d3-51e6) seems to be interestingly flawed. Cf. Ferber, Rafael; Hiltbrunner, Thomas, (2005). (shrink)

Current suggestions for capacities that should be targeted for moral enhancement has centered on traits like empathy, fairness or aggression. The literature, however, lacks a proper model for understanding the interplay and complexity of moral capacities, which limits the practicability of proposed interventions. In this paper, I integrate some existing knowledge on the nature of human moral behavior and present a formal model of prosocial motivation. The model provides two important results regarding the most friction-free route to moral enhancement. First, (...) we should consider decreasing self-interested motivation rather than increasing prosociality directly. Second, this should be complemented with cognitive enhancement. These suggestions are tested against existing and emerging evidence on cognitive capacity, mindfulness meditation and the effects of psychedelic drugs and are found to have sufficient grounding for further theoretical and empirical exploration. Furthermore, moral effects of the latter two are hypothesized to result from a diminished sense of self with subsequent reductions in self-interest. (shrink)