This paper, looking over the life and the texts of the greek philosophers and analyzing the Pythagorean harmony, the two stories of Thales, the outstanding personality of Xenophanes, the humorous sense of Democritus and the Socratic irony, shows that philosophy in the beginning was understood not like an abstract reflection, but like a joyful search of the excellence in the human life.

As Questões Sicilianas são uma resposta elaborada pelo filósofo-místico Ibn Sab’in (1214-1270) a quatro perguntas elaboradas pelo imperador do Sacro Império Romano-germânico Frederico II (1194-1250) sobre a eternidade do mundo, o conhecimento divino, as 10 categorias de Aristóteles e a imortalidade da alma. Qual o contexto destas Questões? As suas fontes, a sua autenticidade? Quais as linhas gerais das respostas e a influência de outros pensadores no seu texto? Qual sua importância do texto na Filosofia Medieval? São estas as questões (...) centrais que pretendemos trabalhar no presente artigo. (shrink)

Um dos livros mais comentados naIdade Média foi o Liber de causis, também conhecidocomo O livro da suprema felicidade.Trata-se de um pequeno texto, baseado na obraElementos teológicos de Proclo. Embora sejampoucas as referências diretas a'o homem ou àÉtica, contudo, é possível elaborar, em linhasgerais, a partir dele, tanto uma Antropologiacomo uma Ética.

The development of nuclear energy technologies in the second half of the 20th century came with great hopes of rebuilding nations recovering from the devasta-tion of the Second World War or recently released from colonial rule. In coun-tries like France, India, the USA, Canada, Russia, and the United Kingdom, nuclear energy became the symbol of development towards a modern and technologically advanced future. However, after more than six decades of experi-ence with nuclear energy production, and in the aftermath of the (...) Fukushima nuclear disaster, it is safe to say that nuclear energy production is not without its problems.Some of these problems have their origins in the very materiality of the technolo-gies involved. For example, not only does the use of highly radioactive materials give rise to risks for the current generation (e.g., in the potential for disaster when reactors melt down) but high-level radioactive waste from nuclear energy production presents a serious intergenerational problem for which an acceptable final solution or its implementation remains elusive. Moreover, nuclear energy technologies have specific social and political consequences. For example, they have been said to be authoritarian technologies (Winner, 1980), requiring cen-tralized authority, secrecy, and technocratic decision-making. While some of these problems could have been foreseen before nuclear energy technologies were introduced, others only arose after these technologies were already integrated into the social and infrastructural fabric of our lives. Addition-ally, new technologies (e.g., Generation III, III+ and IV reactors) are still being developed, bringing with them new and uncertain hazards and risks. Ignorance and uncertainty about the possible deleterious effects of introducing a new technology are inevitable, especially if the technology is complex, large time-scales are involved, or risks depend on social or political factors unforeseen in the design stage. However, this should not deter us from developing and intro-ducing new technologies. Rather, it should motivate us to organize these ‘exper-iments’ with new technologies in society in such a way that we can learn about their possible hazards and risks as effectively and responsibly as possible (van de Poel, 2011, 2015). In this way, it is possible to minimize risks and avoid unwant-ed moral, social or political developments. However, organizing such experi-ments responsibly also means that one could come to the conclusion that continuing an experiment is no longer responsible or desirable. Should we be prepared for such a scenario, and if so, how could we do that? One possible strategy to tackle this issue is that the technology and its introduction should be reversible. The aim of this thesis is to further explore this strategy by answering the following main research question (RQ) and accompanying subquestions (SQ):RQ: What are the implications of reversibility for the responsible develop-ment and implementation of nuclear energy technologies?SQ1: Under what conditions can nuclear energy technologies be considered reversible?SQ2: Why should nuclear energy technologies be reversible?SQ3: If so, how could the reversibility of nuclear energy technologies be achieved?After the introductory chapter 1, the chapters that form the main body of this dissertation each provide a distinct contribution to answering the three subques-tions and, by extension, the main research question. Guided by three historical case studies of nuclear energy technology development (i.e., India, France and the USA), chapter 2 answers the first subquestion by formulating the two condi-tions under which it can be considered reversible, i.e., 1) the ability to stop the further development and deployment of a that technology in society, and 2) the ability to undo the undesirable outcomes (material, institutional or symbolic) of the development and deployment of the technology. Chapter 3 subsequently tackles the second subquestion by establishing the general desirability of technological reversibility by virtue of its relation to responsibility in Emmanuel Levinas’ ethical phenomenology. It argues that technology development is a legitimate response to responsibility but inevitably falls short of the responsibility that inspires it, incessantly calling for technological and political change in the process. Having thus argued that nuclear energy technologies should ideally be reversible, chap-ters 4 and 5 work towards specific strategies to achieve technological reversibil-ity. Chapter 4 first investigates the processes that make it difficult to stop the further development and implementation of a nuclear energy technology in society, thus provid-ing input on how to fulfill the first condition for the reversibility of nuclear energy technologies. To do so, it presents a phenomenological perspective on technology and its adoption based on the work of Alfred Schutz. It also explores different ways in which technology adoption drives the processes of path depend-ence towards technological lock-in. Chapter 5 examines the history of geological disposal of high-level radioactive waste in the USA. It identifies a number of concrete policy pitfalls that could lead to lock-in and that should consequently be avoided. It also presents a number of general design strategies that could facilitate the undoing of undesirable consequences of a technology, thus providing input on how to fulfill the second condition for the reversibility of nuclear energy technol-ogies.Chapter 6 summarizes the central findings of the thesis and explains how these help to answer the research questions. On top of this, it reflects on a number of complications connected to reversibility considerations. Based on this, it is concluded that the question of irreversibility and reversibility is context- and technology-specific and a matter of degree. The chapter concludes with a reflec-tion on generalizations and limitations of the results. Finally, chapter 7 discusses the implications of this dissertation’s results for responsibly experimenting with nuclear energy technologies in society. (shrink)

Mijn wetenschappelijke bijdrage sluit aan bij het stuk van Jan Willem Klop in deze zelfde afscheidsbundel, dat ik van Jan Willem onder embargo te lezen heb gekregen. Je zult je herinneren dat Jan Willem in de CWI lezing ter gelegenheid van zijn eredoctoraat kort refereerde aan de Thue Morse reeks. Noem deze reeks M . Jan Willem gaf de versie die start met 1. Noem het resultaat van omwisselen van nullen en enen in de Thue Morse reeks M . De (...) reeks M is wat je krijgt als je het Thue Morse proces start met 0. (shrink)

Ter gelegenheid van het afscheid van prof. dr. W.J. van der Dussen als hoogleraar cultuurgeschiedenis en filosofie aan de Open Universiteit Nederlanden zijn in deze bundel verspreide opstellen van zijn hand opgenomen. De bijdragen hebben betrekking op de filosofie, de geschiedenis en geschiedfilosofie, maar ook de cultuurfilosofie en -kritiek. De bundel bevat tevens enkele artikelen over de Engelse filosoof R.G. Collingwood: Van der Dussen is internationaal bekend vanwege zijn onderzoek naar diens theorieën en heeft enkele herziene uitgaven van Collingwoods geschiedfilosofische (...) werken verzorgd. (shrink)

Reviews : Zygmunt Bauman, Intimations of Postmodernity ; Steven Seidman and David G. Wagner, Postmodernism and Social Theory ; Stephen Crook, Jan Pakulski and Malcolm Wa ters, Postmodernization: Change in Advanced Society ; Gianni Vattimo, The End of Modernity—Nihilism and Hermeneutics in Post-modern Culture.

During my (Hafiz) childhood in Bangladesh, I experienced the negative impact of the educational system. My experiences initiated a process of conscientization leading to values-driven activism through the establishment of Education for Development and Sustainability (EDS), a child-friendly community of practice, with Trine and Alamin. In encounters with Erling and Sigrid, we became aware that our activities were in accordance with action research based on cooperative inquiry (Heron & Reason, 2008). From that point of departure, we developed our own collaborative (...) living theory. In this paper, we explore the research question “How did we become action researchers and what is our driving force?” by using Stoller’s (1989) autobiographical narrative method to analyse selected, lived experiences. Sharing lived experiences and engaging in activism with each other and the EDS children became the base for our conscientization, radical empiricism and contemplating involvement in EDS. Value based activism can create empathic relations and emotions through shared engagement for social justice and the realization that we create a shared reality. Hence, conducting action research with children/youth is in our experience a key to sustainable development. However, to increase the transparency and validity of our research, we needed to explore how our experiences and actions have influenced our values, emotions and decisions to conduct research, our research topic and the research in itself. Therefore, we have engaged co-researchers and participants to critically question the research practice and made it open for discussion and comments in order to see alternative ways of interpreting situations and processes. (shrink)

'What is real?' has been one of the key questions of philosophy since its beginning in antiquity. But it is not just a question that philosophers ask. This Very Short Introduction discusses what reality is by looking at a variety of arguments, theories, and thought-experiments from philosophy, physics, and cognitive science.

This paper briefly discusses the relations between logic and metalogic in history. Metalogic is understood as a reflection on logic in its various senses, particularly sensu stricto (formal, mathematical) and sensu largo (formal logic plus semantic plus methodology of science). It is shown that metalogic in its contemporary understanding arose after mathematical logic had become a mature discipline. Special passage is devoted to metalogic in Poland. The last part of the paper discussed so-called logocentric predicament.

1. Die erste Hälfte des Kommentars, mit Ausnahme der Kapitel über die Weltseele.

This paper investigates the basis arguments of so-called legal logic and their relation to logic in its standard meaning. There is no doubt that legal arguments belong to logic in the wide sense (sensu largo), but their reduction to schemes of formal logic (logica sensu stricto) is a controversial issue. It can be demonstrated that only some legal arguments fall under explicit rules of formal logic, that is, having a deductive character. Most such reasoning is fallible, and its correctness depends (...) on appealing to extra-logical principles taken from legal norms. For instance, if we say, “If it is permitted more, then it is permitted less” (argumentum a maiori ad minus), we assume that the concepts expressed by the words “more” and “less” are already defined. (shrink)

The relevance of metamathematical researches for philosophy of math- ematics is an indubitable matter. In the paper I shall speak about impli- cations of metamathematics for general philosophy, especially for classical epistemological problems. Let us start with a historical observation con- cerning Hilbert's programme, the rst research programme in metamathe- matics as a separate study of formal systems. This programme was strongly in uence by epistemological considerations. In fact, Hilbert wanted to se- cure all classical mathematics against inconsistencies and this (...) aim had be achieved with the help of nitary consistency proof. Hilbert's claim is like the Cartesian project of reduction of all concepts to clarae et distinctae ideae. The epistemological commitment of original Hilbert's programme may be treated as a prelim- inary heuristic motivation for looking for epistemological implications of metamathematical results. It seems reasonable to examine in this respect three so-called limitative theorems: the rst Godel's incompleteness theo- rem , the second Godel's incom- pleteness theorem consistency of S, cannot be proved in S, providing that S is consistent) and Tarski's undenability theorem ; \S" stands for formal system containing elementary number theory. From the above-mentioned theorems we obtain an important, from philosophical point of view, conclusion: semantics of S cannot be expressed in S. Now, I shall present three applications of limitative theorems to the analysis of classical epistemological problems. (shrink)