This article proposes a 'fusion of horizons' in constructing urban public theologies in South Africa. This is done through the introduction of five interrelated themes that have emerged from the on-going knowledge and idea production by a distinguishable counterpoint in contemporary scholarly, intellectual and activist engagement with the urban, in the authors' own South African context but also wider internationally. In advancing a praxis-agenda for urban public theology, the authors subsequently identify the following, albeit not exhaustive, themes: southern urbanisms and (...) the factor of unprecedented urban migration; 'right to the city' and urbanisation from below; a reclaiming of the commons; the making of 'good cities'; and actors of faith in relation to urban social life. (shrink)

This article proceeded from the assumption that the theme of service delivery in present-day South Africa could well be qualified by the notion of 'crisis', to the extent that this qualification, from a theological perspective and on the basis of comparative social analysis, well recalls the statements in such critical and profound theological documents as The Kairos Document and Evangelical Witness in South Africa on the 'crisis' in the latter years of apartheid. The further recognition that the theme of service (...) delivery constitutes an essentially new focus for practical-theological scholarship in South Africa led the author, who has a pertinent interest in the field of Christian diaconia, to thereupon go the full circle of practical-theological interpretation in developing such a focus. This was done by, firstly, attempting to develop a deeper contextual understanding of the problem of service delivery in the country on the basis of the prevailing debate on service delivery in South Africa, after which the ideas from conceptualisations of two different modes of diaconal practice within contexts of endemic poverty in the practical-theological literature were explored. The discussion concluded with a more pertinent consideration of the extent to which these two conceptualisations could be taken as providing direction in conceptualising a transformational diaconal response to the current service-delivery problem. (shrink)

Most discussions on animal experimentation refer to domesticated animals and regulations are tailored to this class of animals. However, wild animals are also used for research, e.g., in biological field research that is often directed to fundamental ecological-evolutionary questions or to conservation goals. There are several differences between domesticated and wild animals that are relevant for evaluation of the acceptability of animal experiments. Biological features of wild animals are often more critical as compared with domesticated animals because of their survival (...) effects. An important issue is what is called here ``natural suffering'''': the suffering from natural circumstances. Should this type of suffering be taken into account when suffering from experimentation is evaluated? As an answer, it is suggested that ``natural functioning'''' should be considered as an additional standard in the evaluation of wild animal experimentation. Finally, two topics related to the ecological context are considered. Firstly, the often inevitable involvement of non-research animals in wild animal experimentation, and secondly, the eco-centric approach to nature conservation. According to the latter position, animals are subordinated to ecosystems. All these aspects make the evaluation of wild animal experiments much more complex than experiments with domesticated animals. Preliminary scores are proposed to deal with these aspects. It is argued that this should not lead to a more complex governmental regulation, since an effective maintenance and control are hard to realize and one may loose the cooperation of researchers themselves. In addition, non-governmental professional organizations such as research societies and funding organizations play a pivotal role. (shrink)

Using poststructural criticism, we explore how the book of Job deconstructs the deed/consequence nexus that stands at the core of the Hebrew Bible’s theological framework – i.e. the doctrine of reward and punishment. Building on both Derridean deconstruction and Foucauldian resistance, we show that the book of Job refuses to comply with the opposite binary of reward and punishment. First, we demonstrate how the friends in their speeches enforce the binary and, thereby, exercise power over Job. Secondly, we consider Job’s (...) resistance and deconstruction of this binary through both his lived experience and desire to argue with God. Finally, we argue how Job’s desire to argue with God challenges God to defend themself in court. In God’s answer, however, one is introduced to a different God than as portrayed by Job’s friends. Moreover, God’s boastful reply, which lacks any justification for Job’s suffering, makes God appear fragile and weak. As such, this article argues that the book of Job may not merely deconstruct dominant ideology, but also God itself. (shrink)

We distinguish three different readings of the intuitionistic notions of validity, soundness, and completeness with respect to the quantification occurring in the notion of validity, and we establish certain relations between the different readings. For each of the meta-logical notions considered we suggest that the “most natural” reading (which is not the same for all cases) is precisely the one which is required by the recent intuitionistic completeness theorems for IPC.

We distinguish three different readings of the intuitionistic notions of validity, soundness, and completeness with respect to the quantification occurring in the notion of validity, and we establish certain relations between the different readings. For each of the meta-logicalnotions considered we suggest that the "most natural" reading (which is not the same for all cases) is precisely the one which is required by the recent intuitionistic completeness theorems for IPC.

Having studied mathematics, in particular foundations and philosophy of mathematics, it happened that I was asked to teach logic to the students in the Faculty of Philosophy of the Radboud University Nijmegen. It was there that I discovered that logic is much more than just a mathematical discipline consisting of definitions, theorems and proofs, and that logic can and should be embedded in a philosophical context. After ten years of teaching logic at the Faculty of Philosophy at the Radboud University (...) Nijmegen, thirty years at the Faculty of Philosophy of Tilburg University and nine years at the Faculty of Philosophy of the Erasmus University Rotterdam, I got many ideas how to improve my LOGIC book which was published twenty five years ago in 1993 by Verlag Peter Lang. Although the amount of work was enormous, I felt I should do it. It is like working on a large painting where you put some extra color in one corner, add a little detail at another place, shed some more light on a particular face, etc. (shrink)

Depending on what one means by the main connective of logic, the -if..., then... -, several systems of logic result: classic and modal logics, intuitionistic logic or relevance logic. This book presents the underlying ideas, the syntax and the semantics of these logics. Soundness and completeness are shown constructively and in a uniform way. Attention is paid to the interdisciplinary role of logic: its embedding in the foundations of mathematics and its intimate connection with philosophy, in particular the philosophy of (...) language. Set theory is presented both as a conditio sine qua non for logic and as a interesting exact ontology. The study of infinite sets yields perplexing results. Formalization of informal number theory results in formal number theory; Godel's incompleteness is treated. At appropriate places attention is paid to paradoxes, intuitionism, conditionals, the historical development of logic, to logic programming and automated theorem proving for classical logic.". (shrink)

Although there is little empirical doubt of the cerebral base of consciousness, it still has an unapproachable quality about it. Gerald Edelman and Giulio Tononi offer a hypothesis that should give us the tool to start disentangling the 'world knot', an image Arthur Schopenhauer used to describe the problem of the origin of consciousness. Their primary focus is not the richness in everyday experience, but the conditions that allow us that experiential richness -- a difficult enough task, as most would (...) admit reading the book. It shows how the cranial barrier can be overcome by new observation techniques, producing a plethora of experimental data in support of the concepts and theories described in the book. This material leads to the formulation of the dynamic-core hypothesis which describes the necessary biological conditions for consciousness. (shrink)

Intuitionistically. a set has to be given by a finite construction or by a construction-project generating the elements of the set in the course of time. Quantification is only meaningful if the range of each quantifier is a well-circumscribed set. Thinking upon the meaning of quantification, one is led to insights?in particular, the so-called continuity principles?which are surprising from a classical point of view. We believe that such considerations lie at the basis of Brouwer?s reconstruction of mathematics. The predicate ?α (...) is lawless? is not acceptable, the lawless sequences do not form a well-circumscribed intuitionistic set, and quantification over lawless sequences does not make sense. (shrink)

Plants belonging to the genus Salsola (Family: Chenopodiaceae) are common in the arid and semiarid regions of our planet with no less than 69 different Salsola species found in Namibia and the Republic of South Africa. This genus is used as a traditional medicine and aqueous extracts of Salsola have been used by Bushmen women as an oral contraceptive. Ingestion of the Namibian shrub Salsola tuberculatiformis Botsch. by pregnant Karakul sheep leads to prolonged gestation and fetal post‐maturity and, as a (...) result, the pelts of the new‐born karakul lambs are worthless. This initiated an investigation into the active agents in the plant, using the terminal enzyme in adrenal corticosteroidogenesis, cytochrome P450‐dependent 11β‐hydroxylase (P450c11), as a bioassay. Although the active fraction, S2, was extremely labile, partial structure determination suggested the presence of synephrine and a highly reactive aziridine. Therefore a more stable analogue, 2‐(4‐acetoxyphenyl)2‐chloro‐N‐methylethylammonium‐chloride (compound A), was synthesised, which, like the active plant extracts, inhibited adrenal steroidogenesis and acted as a contraceptive. In addition, compound A was stabilised by interaction with steroid‐binding globulins in plasma thus enhancing biological activity in vivo. These findings provided explanations for the complex biological effects of the shrub as well as a new insight into the mode of action of chemically labile plant products in vivo. BioEssays 25:612–619, 2003. © 2003 Wiley Periodicals, Inc. (shrink)

As a reflection on recent debates on the value of wild animals we examine the question of the intrinsic value of wild animals in both natural and man-made surroundings. We examine the concepts being wild and domesticated. In our approach we consider animals as dependent on their environment, whether it is a human or a natural environment. Stressing this dependence we argue that a distinction can be made between three different interpretations of a wild animal’s intrinsic value: a species-specific, a (...) naturalistic, and an individualistic interpretation. According to the species-specific approach, the animal is primarily considered as a member of its species; according to the naturalistic interpretation, the animal is seen as dependent on the natural environment; and according to the individualistic approach, the animal is seen in terms of its relationship to humans. In our opinion, the species-specific interpretation, which is the current dominant view, should be supplemented—but not replaced by—naturalistic and individualistic interpretations, which focus attention on the relationship of the animal to the natural and human environments, respectively. Which of these three interpretations is the most suitable in a given case depends on the circumstances and the opportunity for the animal to grow and develop according to its nature and capabilities. (shrink)

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