In this article we study several reduction principles in the context of Simpson’s set theory ATR0S\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ATR_{0}^{S}$$\end{document} and Kripke-Platek set theory KP (with infinity). Since ATR0S\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ATR_{0}^{S}$$\end{document} is the set-theoretic version of ATR0 there is a direct link to second order arithmetic and the results for reductions over ATR0S\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ATR_{0}^{S}$$\end{document} are as expected and more or less (...) straightforward. However, over KP we obtain several interesting new results and are lead to some open questions. (shrink)

This article develops an ecological framework for understanding collective action. This is contrasted with approaches familiar from the collective intentionality debate, which treat individuals as fundamental units of collective action. Instead, we turn to social ecological psychology and dynamical systems theory and argue that they provide a promising framework for understanding collectives as the central unit in collective action. However, we submit that these approaches do not yet appreciate enough the relevance of social identities for collective action. To analyze this (...) aspect, we build on key insights from social identity theory and synthesize it with embodied and ecological accounts of perception and action. This results in the proposal of two new types of affordances. For an individual who enacts her "embodied social identity" of being a member of a particular collective, there can be what we call embodied social identity affordances. Moreover, when several individuals dynamically interact with each other against the background of their embodied social identities, this might lead to the emergence of a collective, which we understand as a dynamically constituted and ecologically situated perception-action system consisting of several individuals enacting relevant embodied social identity affordances. Building on previous work in social ecological psychology, we suggest that there can be genuine collective affordances, that is, affordances whose subject is not an individual, but a collective. (shrink)

The extant manuscripts of Nicholas of Cusa’s private library are not only a unique testimony to the reading world of one of the most important philosophers of the 15th century. They also document the material context of a specific literary activity by their reader: as is well known, Cusanus frequently annotated his books, noting his thoughts in the margins. This paper focuses on Cusanus’ marginalia as an object of research and edition. In a first step, the essay reconstructs the 20th-century (...) editorial history of this special textual tradition and embeds it in the developments of the modern philological and historiographical work on Nicholas of Cusa. In a second step, it offers an interpretation of Cusanus’ marginalia as a coherent textual corpus and investigates the reading and writing practices to which this corpus bears witness. Finally, against this background, the paper presents a case for the scientific relevance of a continuation and re-conception of the critical edition of Cusanus’ marginalia, which began in 1941 with the first volume of the series Cusanus-Texte III. Marginalien and has remained unfinished to date. (shrink)

In this article we discuss the notion of a linguistic universal, and possible sources of such invariant properties of natural languages. In the first part, we explore the conceptual issues that arise. In the second part of the paper, we focus on the explanatory potential of horizontal evolution. We particularly focus on two case studies, concerning Zipf’s Law and universal properties of color terms, respectively. We show how computer simulations can be employed to study the large scale, emergent, consequences of (...) psychologically and psychologically motivated assumptions about the working of horizontal language transmission. (shrink)

This article provides the proof-theoretic analysis of the transfinitely iterated fixed point theories $\widehat{ID}_\alpha and \widehat{ID}_{<\alpha};$ the exact proof-theoretic ordinals of these systems are presented.

This book explains psychological, sociopolitical and organisational change in multidisciplinary settings. It shows how advanced techniques of contextual analysis can be applied to complex situations and offers a new cybernetic agency paradigm based on living systems theory. It models, diagnoses, and analyses complex, realworld situations to anticipate patterns of behaviour.

Two conditions guiding permissible use of force in self-defence are proportionality and success. According to the proportionality condition the means used to prevent an attack can be permissible only if they are proportional to the interest at stake. According to the success condition, otherwise impermissible acts can be justified under the right to self-defence only if they are likely to succeed in preventing the perceived threat. These requirements should not always be interpreted narrowly. Sometimes people are permitted to kill culpable (...) aggressors in order to avoid a non-lethal harm. Sometimes people are permitted to take up arms to defend themselves against culpable aggressors they have little or no hope of defeating. (shrink)

At the heart of the current debate about immigration we find a conflict of convictions. Many people seem to believe that a country has a right to decide who to let in and who to keep out, but quite often they appear equally committed to the view that it is morally wrong to expel someone from within the borders of their country if that would seriously jeopardise the person in question. While the first conviction leads to stricter border controls in (...) an attempt to prevent would‐be immigrants from entering the country illegally, the latter conviction ensures that aliens with a legitimate claim on protection will not be removed forcibly. It is not strange, therefore, that the task of pinning down a morally sound immigration policy is such an elusive enterprise.In this paper I take it for granted that no electorate would be prepared to accept the kind of policy they ought to, and that we in consequence will continue to let in as few immigrants as is currently the case. Given this constraint I argue against two common assumptions concerning a viable immigration policy. First, granted that certain conditions are satisfied, professional smugglers should not face legal sanctions for bringing asylum seekers to a potential host country. Second, countries that limit immigration should not treat people seeking family reunion preferentially or on a par with other immigrants, but rather act so as to maximise the number of refugees allowed to enter. (shrink)

Question: Where, when and under what circumstances did the two of you get to know each other?Fischer: It was in the early seventies, in Frankfurt, after the dissolution of the gauche proletarienne and while there were still leftist groups in Germany. It must have been 1972. Question: Was that a private visit?Glucksmann: We had private discussions. We also participated in rallies and demonstrations.Question: That was in the late phase of the student movement.Fischer: We kept in contact through my old room-mate, (...) Daniel Cohn-Bendit. He was our link to France, so to speak.Question: And was this the link between the French and the German Left that existed then? (shrink)

L’idée d’organiser à Paris un congrès international de philosophie scientifique « fut émise pour la première fois au cours d’une conversation à Berlin, en juillet 1932, entre Hans Reichenbach et Louis Rougier ». Dans une lettre du 6 août 1932 adressée à Reichenbach, Rougier mentionne déjà des contacts avec le ministère des Affaires étrangères pour obtenir des subventions et le 6 novembre de la même année, il propose à Reichenbach de tenir la manifestation en 1934 [voir Padovani 2006, 239-–240...

[T]he essays collected here... further determine the limits of experience as well as salvage something essential from that which takes place at the very limit of political and aesthetic experience. Included here are critical readings of such seminal figures as Locke, Kant, Nietzsche, Adorno, Foucault, Fanon, Lacoue-Labarthe, Badiou, and Rancière." -Cover.