Although we frequently acquire knowledge and skills through social interactions, the focus of most research on learning is on individual learning. Here we characterize Interaction Based Learning, which represents the acquisition of knowledge or skill through social interactions, and compare it to Observational Learning —learning by observation. To that end, we designed a movement synchronization paradigm whereby participants learned Tai-Chi inspired movement sequences from trained teachers in two separated sessions. We used a motion capture system to track the movement of (...) 40 dyads comprised of a teacher and learner, who were randomly divided into OL or IBL groups, and calculated time-varying synchrony of three-dimensional movement velocity. While in the IBL group both the learner and the teacher could see each other through a transparent glass, in the OL group dyads interacted through a one-way mirror, such that the learners observed the teacher, but the teacher could not see the learners. Results show that although the number of movements recalled was not different between groups, we found improved movement smoothness in the IBL compared to the OL group, indicating movement acquisition was better in the IBL group. In addition, we found that motor synchronization levels in dyads improved over time, indicating that movement synchronization can be learned and retained. In the first session, the IBL group, but not the OL group, showed a significant improvement in synchronization. This suggests that dyadic interaction is important for learning movement sequences, and that bidirectional communication of signals and mutual feedback are essential for the consolidation of motor learning. (shrink)

Lajevardi and Salehi, in “There may be many arithmetical Gödel sentences”, argue against the use of the definite article in the expression “the Gödel sentence”, by claiming that any unsound theory has Gödelian sentences with different truth values. We show that their Theorems 1 and 2 are special cases (modulo Löb's theorem and the first incompleteness theorem) of general observations pertaining to fixed points of any formula, and argue that the false sentences of Lajevardi and Salehi are in fact not (...) Gödel sentences. (shrink)

This essay reads Hannah Arendt’s Rahel Varnhagen alongside Sigmund Freud’s case history of paranoia, The Schreber Case, two texts about 18th- and 19th-century personalities caught up in the gender and ethnic politics of their times. Noting affinities between the fantasies documented in Varnhagen’s and Schreber’s memoirs, I compare Seyla Benhabib’s and Eric Santner’s readings of these two texts as political, not psychological, documents. I propose a reading of paranoia positioned between Benhabib’s too optimistic dismissal of paranoia and Santner’s too tragic (...) approach. The result is a new reading of Varnhagen’s story and an approach to paranoia as a potentially promising political affect. Might paranoia stand not just for world-withdrawal but also for world-building? If so, this would be in keeping with Arendt’s own treatment of her subject’s persecution fantasies not only as a “verdict against the world” but also as a desire for a world. (shrink)

Letterforms are an inseparable part of a civilized literary landscape. At some distant point in history, letters started as representations of things in the world. Then, gradually, through a complex evolutionary process, they came to be defined as the closed shapes of a writing system. This photo-typographic essay is a meditation on this remarkable transition. Exploring the relationship between typography and the visual world around us, the essay looks at the twenty-six letters of the English version of the Roman alphabet (...) in four manners: as the world presenting itself in the shape of a letter, as an intended letter in space, as a flat letter on paper, and finally as a pure geometric form embodied in a typeface. Familiar letterforms are presented in fresh, surprising ways, forming an homage to the beauty of type and a reflection on its ubiquity in our visual understanding of the world around us. Alongside the fascinating images, Ornan Rotem's text offers an overview and a detailed discussion of each letter. In this unusual book, text and image coalesce to create a modern day primer on letters: a typographic abecedarium. (shrink)

In this book, Shlomo Biderman examines the views, outlooks, and attitudes of two distinct cultures: the West and classical India. He turns to a rich and varied collection of primary sources: the _Rg Veda_, the Upanishads, and texts by the Buddhist philosophers Någårjuna and Vasubandhu, among others. In studying the West, Biderman considers the Bible and its commentaries, the writings of such philosophers as Plato, Descartes, Berkeley, Kant, and Derrida, and the literature of Kafka, Melville, and Orwell. Additional sources are (...) Mozart's _Don Giovanni_ and seminal films like Ingmar Bergman's _Persona_. Biderman uses concrete examples from religion and literature to illustrate the formal aspects of the philosophical problems of transcendence, language, selfhood, and the external world and then demonstrates their plausibility in actual situations. Though his method of analysis is comparative, Biderman does not adopt the disinterested stance of an "ideal" spectator. Rather, Biderman approaches ancient Indian thought and culture from a Western philosophical standpoint to uncover cultural presuppositions that can be difficult to expose from within the culture in question. The result is a fascinating landmark in the study of Indian and Western thought. Through his comparative prism, Biderman explores the most basic ideas underlying human culture, and his investigation not only sheds light on India's philosophical traditions but also facilitates a deeper understanding of our own. (shrink)

This article starts with a critical reflection on John Westlake’s reading of the history of empire and the English/British East India Company – for him, essentially, the proper concern of ‘constitutional history’ rather than international law. For Westlake, approaching this history through the prism of nineteenth-century positivist doctrine, the Company’s exercise of war powers could only result from state delegation. Against his warnings to international lawyers not to stray from the proper boundaries of international legal inquiry, the article proceeds to (...) recover Hugo Grotius’s theory of corporate belligerency in his early treatise De iure praedae. For Grotius, corporations could wage public war on behalf of the state yet, at the same time, were in law capable of waging private war in their own right. The article proceeds to reflect on the practice of corporate belligerency in the centuries separating Westlake and Grotius; it concludes with observations on the implications of Grotius’s theory of corporate belligerency today. (shrink)

Abstract According to idealism the world, as we perceive it, is in effect a creation of the mind. There are many different forms of idealism and this paper investigates one form of idealism that was advocated by the 4th century Buddhist Yog?c?rin Vasubandhu and one not unfamiliar in the west, especially in the works of George Berkeley. This paper suggests that when idealism, as a metaphysical theory, is set within a soteriological framework, as is the case with Vasubandhu, it serves (...) to bridge the philosophical endeavour with the religious quest as outlined in Buddhist thought. Idealism is a theory about the borders between mind and matter, and specifically about the demolition of matter. This demolition, in the hands of Vasubandhu, manages to redefine the framework of speculation by incorporating the soteriological within it and thus constructing a viable bridge between philosophy and religion. (shrink)

Might paranoia bear some promise, not only danger, for democratic theory and politics? To suggest that we should treat paranoia with anything but disdain today, in the age of Q anon and other white-supremacist lies, seems dangerous. But three decades ago, feminist theorist Naomi Schor took the risk and defended female paranoia, arguing that paranoia is an appropriate affect for feminist theory and critique. This essay follows Schor’s invitation to risk proximity to paranoia. I argue that the political importance of (...) Schor’s essay lies in one particular attribute of female paranoia that she celebrates: its love of detail. To explore the promise and limitations of the paranoid love of detail I pair Schor with two 20th-century theorists – Hannah Arendt and Simone de Beauvoir. Each studies a paranoid woman who clings to details: Arendt’s Rahel Varnhagen counts the number of teacups that she serves in her German salon. Beauvoir’s housewife collects tufts of dust. With Schor, Arendt and Beauvoir, the article argues that love of detail is a critical component not only of paranoid indictments of the world, but also of any project that desires to repair the world in the wake of paranoia. (shrink)

Lajevardi and Salehi, in “There may be many arithmetical Gödel sentences”, argue against the use of the definite article in the expression “the Gödel sentence”, by claiming that any unsound theory has Gödelian sentences with different truth values. We show that their Theorems 1 and 2 are special cases (modulo Löb's theorem and the first incompleteness theorem) of general observations pertaining to fixed points of any formula, and argue that the false sentences of Lajevardi and Salehi are in fact not (...) Gödel sentences. (shrink)

Lajevardi and Salehi, in “There may be many arithmetical Gödel sentences”, argue against the use of the definite article in the expression “the Gödel sentence”, by claiming that any unsound theory has Gödelian sentences with different truth values. We show that their Theorems 1 and 2 are special cases (modulo Löb's theorem and the first incompleteness theorem) of general observations pertaining to fixed points of any formula, and argue that the false sentences of Lajevardi and Salehi are in fact not (...) Gödel sentences. (shrink)

The merging of the positions of photographer and collector defines the drive of a certain kind of photographic work, for which the camera becomes a collecting device, accumulating a collection that speaks the subjectivity of its author – the photographer. There are, however, two impulses at work here: the photographer-as-collector and the collector-as-photographer. Both are present in the work of Martin Parr, who has openly admitted that he has ‘the collecting gene’, but also, somewhat earlier, in the work of Walker (...) Evans whose obsession with collectibles and whose mode of photographic collecting provide a striking historical precedent for Parr’s compulsive practice. My article explores the collecting impulse that motivates these photographers and, more particularly, shapes a new mode of making photographs and cataloguing social life that seem to escape established genre categories, including especially the category of documentary. (shrink)

Recently Carrie S. Jenkins formulated an epistemology of mathematics, or rather arithmetic, respecting apriorism, empiricism, and realism. Central is an idea of concept grounding. The adequacy of this idea has been questioned e.g. concerning the grounding of the mathematically central concept of set (or class), and of composite concepts. In this paper we present a view of concept formation in mathematics, based on ideas from Carnap, leading to modifications of Jenkins’s epistemology that may solve some problematic issues with her ideas. (...) But we also present some further problems with her view, concerning the role of proof for mathematical knowledge. (shrink)

Attempts have been made to analyse features in mathematics within a social constructivist context. In this paper we critically examine some of those attempts recently made with focus on problems of the objectivity, ontology, necessity, and atemporality of mathematics. Our conclusion is that these attempts fare no better than traditional alternatives, and that they, furthermore, create new problems of their own.

Background:Cardio-pulmonary resuscitation is the default procedure during cardio-pulmonary arrest. If a patient does not want cardio-pulmonary resuscitation, then a do not attempt resuscitation order must be documented. Often, this order is not given; even if thought to be appropriate. This situation can lead to a slow code, defined as an ineffective resuscitation, where all resuscitation procedures are not performed or done slowly.Research objectives:To describe the perceptions of nurses working on internal medicine wards of slow codes, including the factors associated with (...) its implementation.Research design:This was a cross-sectional, descriptive study. Participants completed a personal characteristics questionnaire and the Perceptions and Factors of Slow Codes questionnaire designed for this study.Participants and research context:The sample was a convenience sample of nurses working on internal medicine wards in two Israeli hospitals.Ethical considerations:The study received ethical approval from both institutions, where data were collected and stored according to institutional policy.Findings:Most reported that resuscitations were conducted according to protocol. Some took their time calling the code, or waited by the bedside and did not perform cardio-pulmonary resuscitation. Factors most associated with slow codes were poor patient prognosis and a low chance of patient survival. Two-thirds reported that slow codes were done on their unit and the majority perceived slow codes as ethical.Discussion:This study confirms that slow codes are part of medical care on internal medicine wards, where most nurses perceive them as an ethical alternative. These perceptions are in contrast to most legal and ethical opinions expressed in the literature.Conclusion:Nurses should be educated about the legal and ethical implications of slow codes, and qualitative and quantitative studies should be conducted that further investigate its implementation. (shrink)

A collection of essays in which philosophers of widely different interests grapple with the problem of the relative and the absolute in philosophy and religion.

States commit wrongs that demand redress. In her recent book, Avia Pasternak considers the circumstances under which it is legitimate to impose the cost of redress upon the state’s citizens at large. Her answer is that it is legitimate to impose reparative burdens on citizens only when they participate in their state intentionally, specifically, when they intend to play their part in maintaining state institutions. The book thus has revisionary implications for current international legal practice, given reparative burdens are currently (...) imposed upon states no matter their internal relations. The book’s persuasive argument will be of interest not only to scholars of normative political theory and social ontology, but also international legal theorists. That said, its core claim that citizen participation must be ‘genuine’ would benefit from further specification through future scholarship. (shrink)