Résumé Loin d’être un programme de recherche tourné uniquement vers l’abstraction, la physiocratie comporte une dimension empirique tout à fait centrale dans sa constitution et dans son développement. L’étude de cette dimension permet de mettre au jour les liens généalogiques et méthodologiques qui ont uni le mouvement physiocratique et les traditions anglaise et française de l’arithmétique politique. En outre, une attention portée à l’inventaire des différentes activités agricoles et à la mesure de leurs productions respectives témoigne d’une autre influence importante (...) dans la construction de l’économie politique de Quesnay, à savoir l’agronomie, alors en plein renouveau sous l’impulsion de Duhamel du Monceau. (shrink)

At the very beginning of L’Homme-Machine, La Mettrie claims that Leibnizians with their monads have “rather spiritualized matter than materialized the soul”; a few years later Pierre-Louis Moreau de Maupertuis, President of the Berlin Academy of Sciences and natural philosopher with a strong interest in the modes of transmission of ‘genetic’ information, conceived of living minima which he termed molecules, “endowed with desire, memory and intelligence,” in his Système de la nature ou Essai sur les corps organisés. This text first (...) appeared in Latin in 1751 under the title Dissertatio inauguralis metaphysica de universali naturae systemate, with the pseudonym Dr Baumann; it was translated by Maupertuis in 1754 as Essai sur la formation des corps organisés and was later included in his 1756 Œuvres under the title Système de la nature. Now, it is clear that Maupertuis was a kind of Leibnizian; and that his molecule possessed higher-level, ‘mental’ properties. In that sense he falls under the first category described by La Mettrie. But he was also involved in a debate on this issue with Diderot, who put forth a sustained critique of Maupertuis’ theory of the molecule in the additions to his 1753 Pensées sur l’interprétation de la nature. Where Maupertuis attributes higher-level properties to his living minima, Diderot argues that these properties are ‘organizational’, i.e., they can only be properties of the whole. At issue here is the degree of commitment to a form of materialism. (shrink)

In his Philosophical Inquiry concerning Human Liberty (1717), the English deist Anthony Collins proposed a complete determinist account of the human mind and action, partly inspired by his mentor Locke, but also by elements from Bayle, Leibniz and other Continental sources. It is a determinism which does not neglect the question of the specific status of the mind but rather seeks to provide a causal account of mental activity and volition in particular; it is a ‘volitional determinism’. Some decades later, (...) Diderot articulates a very similar determinism, which seeks to recognize the existence of “causes proper to man” (as he says in the Réfutation d’Helvétius). The difference with Collins is that now biological factors are being taken into account. Obviously both the ‘volitional’ and the ‘biological’ forms of determinism are noteworthy inasmuch as they change our picture of the nature of determinism itself, but my interest here is to compare these two determinist arguments, both of which are broadly Spinozist in nature – and as such belong to what Jonathan Israel called in his recent book “the radical Enlightenment,” i.e. a kind of underground Enlightenment constituted by Spinozism – and to see how Collins’ specifically psychological vision and Diderot’s specifically biological vision correspond to their two separate national contexts: determinism in France in the mid-1750s was a much more medico-biological affair than English determinism, which appears to be on a ‘path’ leading to Mill and associationist psychology. (shrink)

Both the physiological and the pathological morphogenetic processes that we can meet in embryogenesis, neogenesis and degenerative dysgenesis present common features: they are ruled by three different kinds of mechanisms, one related to cell migration, the second to cell differentiation and the third to cell proliferation. We deal here with an application to the cambial growth which essentially involves the third type of mechanism.Woody plants produce secondary tissue (secondary xylem and phloem) from a meristematic tissue called vascular cambium, responsible for (...) the radial growth of a tree. This paper focuses on the formation of secondary xylem, considered in two dimensions in a cross-section framework. A new discrete modelling approach is used, based on the cellular scale, in order to attain a more accurate understanding of how the elementary microscopic behaviour of each cell takes part in the macroscopic morphogenesis. The mathematical model essentially uses an occurrence method simulating the main features of radial growth with simple geometric rules, such as Thom's division rule (Thom,1972)to account for the cell proliferation. The study applies to concrete instances in which the changes made in the geometrical cellular patterns of the vascular cambium clearly affect the shape of the tree, as in Pinus radiata (D. Don.). (shrink)

Morphogenesis is a key process in developmental biology. An important issue is the understanding of the generation of shape and cellular organisation in tissues. Despite of their great diversity, morphogenetic processes share common features. This work is an attempt to describe this diversity using the same formalism based on a cellular description. Tissue is seen as a multi-cellular system whose behaviour is the result of all constitutive cells dynamics. Morphogenesis is then considered as a spatiotemporal organization of cells activities. We (...) show how this formalism relies on Reaction–Diffusion/Positional Information approach and how it permits to generalize its modelling possibilities. Three quite different applications for concrete morphogenetic processes are presented. The first one is a model for epithelial invagination, the second is a model of cellular differentiation by local cell–cell signalling. The last example is the secondary radial growth of conifer trees. From the mathematical point of view, different modelling tools are used according to the specificity of each process. (shrink)

Cet article a pour objet la conception de matériel pédagogique pour l’apprentissage endolingue de la relation entre le passé composé et l’imparfait dans le récit en FLE. Faut-il privilégier le choix d’une visée sur le procès ou bien montrer que la distribution des temps s’effectue à partir d’indices contextuels qu’il faut repérer? La première position a été représentée, par exemple, dans le manuel Libre Échange, mais délaissée par la suite. Notre propre analyse de 17 manuels publiés entre 2006 et 2016 (...) confirme la tendance. On constate en outre qu’il n’y a aucun exemple d’un même procès sous les deux aspects accompli et inaccompli, comme si cette option avait été bannie. Toutefois, l’approche aspectuelle n’est pas tout-à-fait absente : on considère le cas d’un manuel tendant à intégrer présence d’un sujet opérant des choix de visée et emplois normés des temps. Finalement, on propose un matériel qui exploite la syntaxe distincte des énoncés avec l’imparfait et le passé composé. Dans un cadre énactif, on envisage que l’énonciateur prend deux états différents, où il perçoit un présent imaginé, ou bien où il devient « possesseur » d’un accompli. On détaille la conception théorique, décrit des visuels extraits du matériel, et suggère une gestuelle pédagogique pour montrer comment cette approche peut soutenir l’apprentissage des temps du récit. (shrink)

The Court of Justice of the European Union (CJEU) has some basic structural features similar to that of most judicial bodies. According to the treaties, the members of the Court are chosen from individuals whose independence is beyond doubt and who possess the ability required for appointment to higher judicial offices. The involvement of the Court and its president in the most important reforms of the European Union's judicial architecture in recent years is a striking feature which may be called (...) judicial self‐government. International courts have shifted away from being principally committed to dispute settlement towards pursuing other goals, such as advancing international norms and facilitating cooperative international arrangements. The reinforcement of the cooperation of the Court with national courts on the one hand, and with international courts and tribunals on the other, is one of the great current challenges facing the Court. (shrink)

The agronomist who wants to study the nutrient and water uptake of roots needs a quantitative three-dimensional dynamic model of the structure of root systems.The model presented takes into account current knowledge about the morphogenesis of root systems. It describes the root system as a set of root axes, characterised by their orders. The morphogenetic properties of root axes differ according to their order. The axes of order 1 are directly inserted on the stem, the axes of order 2 are (...) inserted on axes of order 1, and so on. They tend to be more plagiotropec and to have less vascular bundles as the order increases. (shrink)

À partir de textes officiels, de publications professionnelles et de représentations d’enseignantes d’EPS ayant vécu la mise en place de la mixité, cet article analyse la construction du genre en éducation physique durant les années 68. Si la mixité est d’abord évacuée au profit de l’officialisation sportive de l’éducation physique, les dissidences acquièrent une légitimité certaine durant la crise de mai-juin 68. Pourtant, l’organisation de l’EPS conserve une frontière et maintient les distinctions sexuées. Au terme des années 68, la mixité (...) n’est plus ignorée et les discriminations se sont déplacées. Elles sont paradoxalement le fruit des enseignantes elles-mêmes qui déconsidèrent la féminité au regard de leurs attentes sportives. (shrink)

We propose that interaction rules derived from polyamine exchange in connected cells may explain the spatio‐temporal organization of gap junctions observed during tissue regeneration and tumorigenesis. We also hypothesize that polyamine exchange can be considered as signal that allows cells to sense the proliferation status of their neighbors. Polyamines (putrescine, spermidine, and spermine) are indeed small aliphatic polycations that serve as fuels to sustain elevated proliferation rates of the order observed in cancer cells. Based on recent reports, we consider here (...) that polyamines can be exchanged through gap junction channels between mammalian cells. Such intercellular exchange of polyamines has critical consequences on the local control of growth. In line with this hypothesis, the complex protein network that keeps polyamine levels finely tuned in mammalian cells can translate polyamine efflux or influx into integrated signals controlling transcription, translation, and cell communications. (shrink)

L’installation et le développement de la discipline universitaire « Sciences et techniques des activités physiques et sportives » ne peuvent être pleinement compris que si l’on voit qu’ils résultent de l’action conjointe de facteurs cognitifs et sociaux. La perspective sociohistorique montre que ce qui est arrivé récemment a d’abord été préparé par un long processus non linéaire et complexe. Mais il a encore fallu sur le court terme un dynamisme cognitif interne et des effets sociaux multiples, enchevêtrés, voulus et non (...) voulus, afin que s’établissent l’instutionnalisation irréversible de cette nouvelle discipline universitaire, son « académisation », puis son expansion « démographique ».The setting-up and development of the « sport sciences » as an academic discipline can only be fully grasped by acknowledging that it results from the combined action of both cognitive and social factors. Viewed in a social and historical light, what has recently taken place proves to have come at the end of a long, complex and winding process. But, in the short run, internal cognitive dynamics as well as multiple and intertwined social effects – whether intended or not – were also necessary for the non-reversible institutionalization of this new academic discipline, its establishment as part of the academia and eventually its « demographic » expansion. (shrink)

Ce livre étudie, à travers une série d'épisodes allant de la philosophie des Lumières à notre époque, le problème du matérialisme dans l'histoire de la philosophie et l’histoire des sciences. Comment comprendre les spécificités de l’histoire du matérialisme, des Lumières à nos jours, au sein de la grande histoire de la philosophie et de l’histoire des sciences ? Quelle est l’actualité de l’opposition classique entre le corps et l’esprit ? Qu’est-ce que le rire ou le rêve peuvent nous apprendre du (...) matérialisme ? En traversant l’histoire de ce concept jusqu’à l’émergence d’un « nouveau matérialisme » contemporain, l’ouvrage vise à revitaliser le matérialisme et sa lecture. -/- . (shrink)

This book is an examination of the inattention of business schools to moral education, addressing lessons learned from the most recent business corruption scandals and financial crises, and also questioning what we're teaching now and what should be considering in educating future business leaders to cope with the challenges of leading with integrity in the global environment"--Provided by publisher.

Résumé Cet article présente l’analyse d’une expérience de construction de savoirs mathématiques en rapports avec les machines, dans les années 1950 et 1960, à une époque où le calcul analogique cohabitait avec le calcul digital (c’est-à-dire le futur « ordinateur », terme introduit dans la langue française pour désigner principalement les « digital computers »). Les mathématiques en jeu relèvent des théories des systèmes dynamiques, c’est-à-dire des outils mathématiques construits pour comprendre la dynamique de différents types de systèmes, qu’ils soient (...) mathématiques, physiques, biologiques, mécaniques, etc. L’objet du présent article est à la fois un groupe de chercheurs, leurs pratiques de « mathématiques pour l’ingénieur », leurs efforts pour construire des calculateurs analogiques (mécanique ou électronique) pour étudier la dynamique, le programme baptisé « Dynamique théorique » qu’ils se sont fixés, et l’épistémologie des mathématiques sous-tendant leur pratique. (shrink)

Discusses heaven, the Creation, forgiveness, vanity, the theology of romantic love, responsibility, and the life of Jesus.

The living body appears like an endlessly renewable reservoir of authenticity, hope, and taboo. But, for the sake of conceptual clarity, we are often been told that the (mere) body should be distinguished from the flesh. That is, it’s undeniable that I have a body; that I notice yours; that we worry about their birth and death and upkeep. But the flesh is a more transcendentalized, loaded concept – not least given its frequently religious background (incarnation: the Word made Flesh). (...) It is the body ‘kicked upstairs’, ‘bumped up’ one ontological level. Flesh is like a mantra, an obsessive leitmotif. Is the difference just one of abstraction? Indeed, crucial to the narrative of phenomenology (most obviously in Merleau-Ponty but really, throughout, including in enactivism), to the story of ancestor worship and identity it tells itself and its acolytes around the campfire, is a basic distinction between the merely physical body and the flesh as something requiring ‘mineness’, namely, an understanding of it as uniquely ‘my own’, a feeling of ‘what it is like to be embodied’. This goes back to the Husserlian distinction between Körper, ‘body’ in the sense of one body among others in a vast mechanistic universe of bodies, and Leib, ‘flesh’ in the sense of a subjectivity which is the locus of experience. In this essay I reflect on this vision of the body’s authenticity and its costs, and contrast it with insights derived from Georges Canguilhem, whose critique of mechanism/mechanicism is not done in the name of a wholescale organicism and/or an unproblematized éloge of embodiment and privacy. (shrink)

We have developed an approach to implementing a system for managing situated knowledge for complex instruments. Our aim is to develop a system that guides a user through the steps for operating complex scientific instruments. A user manual is often inadequate support for a community of users, so direct communication with an expert is often required. One reason for this is that not all of the author’s expert knowledge was included in the manual, thus limiting the contents to explicit knowledge. (...) This is a main concern of modern knowledge management practitioners who are attempting to design systems that consider both explicit and tacit knowledge. The key is to distribute explicit knowledge through interaction with the real world so that users can develop tacit knowledge as well as acquire explicit knowledge. We describe technical difficulties related to referencing the real world, which is required for interaction, and describe a novel approach to building a low-cost three-dimensional pointer for obtaining the required knowledge, which constitutes our preliminary result. (shrink)

This volume emphasizes the diversity and fruitfulness of early modern mechanism as a program, as a concept, as a model. Mechanistic study of the living body but also of the mind and mental processes are examined in careful historical focus, dealing with figures ranging from the first-rank (Bacon, Descartes, Spinoza, Cudworth, Gassendi, Locke, Leibniz, Kant) to less well-known individuals (Scaliger, Martini) or prominent natural philosophers who have been neglected in recent years (Willis, Steno, etc.). The volume moves from early modern (...) medicine and physiology to late Enlightenment and even early 19th-century psychology, always maintaining a conceptual focus. It is a contribution to a newly active field in the history and philosophy of early modern life science. It is of interest to scholars studying the history of medicine and the development of mechanistic theories. (shrink)

Most decisions concerning insurance and self-protection have to be taken in situations in which the effort exerted precedes the moment uncertainty realizes, and the probabilities of future states of the world are not perfectly known. By integrating these two characteristics in a simple theoretical framework, this paper derives plausible conditions under which ambiguity aversion raises the demand for insurance and self-protection. In particular, it is shown that in most usual situations where the level of ambiguity does not increase with the (...) level of effort, a simple condition of ambiguity prudence known as decreasing absolute ambiguity aversion is sufficient to give a clear and positive answer to the question: Does ambiguity aversion raise the optimal level of effort? (shrink)

This paper reflects on the notion of partial ambiguity. Using a framework decomposing ambiguity into distinct layers of analysis, among which are risk and model uncertainty, and allowing for different attitudes toward these layers, I show that partial ambiguity may prove less desirable than full ambiguity, even under ambiguity aversion. This observation poses difficulties for interpreting the notion of partial ambiguity in relation to the partial information available to determine the potential compositions of an ambiguous urn. Two Ellsberg-style thought experiments (...) are described to challenge the meaning of partial ambiguity further, and an alternative interpretation, based on a more ambiguous relation, is discussed. (shrink)

Implemented gradually since 2002 and following in the footsteps of the “Bologna Process” initiated in the late 1990s, successive reforms of university education in France have profoundly changed the landscape of higher professional degrees. The Diplômes d’Enseignement Supérieur Spécialisé (DESS) (Specialized Higher Education Diplomas), which have become professional Masters, offer a paradigmatic example of the tensions between the former aims of professionalization in universities and the teaching to, by, or for research present in these diplomas. The case of the professional (...) Master’s degree in “Strategy and Engineering in Adult Training” (SIFA) at Rennes 2 University illustrates this problem. (shrink)

Reasonning in naive set theory (with unlimited comprehension), we derive a paradox (a formal contradiction) which can be seen as a variant of the Burali-Forti paradox.

Introduction Previous research has explored euthanasia’s ethical dimensions, primarily focusing on general practice and, to a lesser extent, psychiatry, mainly from the viewpoints of physicians and nurses. However, a gap exists in understanding the comprehensive value-based perspectives of other professionals involved in both somatic and psychiatric euthanasia. This paper aims to analyze the interplay among legal, medical, and ethical factors to clarify how foundational values shape the ethical discourse surrounding euthanasia in both somatic and psychiatric contexts. It seeks to explore (...) these dynamics among all healthcare professionals and volunteers in Belgium. Methods Semi-structured interviews were conducted with 30 Dutch-speaking healthcare workers who had encountered patients requesting euthanasia for psychiatric conditions, in Belgium, from August 2019 to August 2020. Qualitative thematic analysis was applied to the interview transcripts. Findings Participants identified three pivotal values and virtues: religious values, professional values, and fundamental medical values encompassing autonomy, beneficence, and non-maleficence, linked to compassion, quality care, and justice. These values interwove across four tiers: the patient, the patient’s inner circle, the medical realm, and society at large. Irrespective of their euthanasia stance, participants generally displayed a blend of ethical values across these tiers. Their euthanasia perspective was primarily shaped by value interpretation, significance allocation to key components, and tier weighting. Explicit mention of varying ethical values, potentially indicating distinct stances in favor of or against euthanasia, was infrequent. Conclusion The study underscores ethical discourse’s central role in navigating euthanasia’s intricate landscape. Fostering inclusive dialogue, bridging diverse values, supports informed decision-making, nurturing justice, and empathy. Tailored end-of-life healthcare in psychiatry is essential, acknowledging all involved actors’ needs. The study calls for interdisciplinary research to comprehensively grasp euthanasia’s multifaceted dimensions, and guiding policy evolution. While contextualized in Belgium, the implications extend to the broader euthanasia discourse, suggesting avenues for further inquiry and cross-cultural exploration. (shrink)

Cet échange avec l’association grenobloise À bientôt j’espère retrace un travail singulier de diffusion itinérante de films documentaires qui expérimente depuis plusieurs années des possibilités alternatives de visionnage cinématographique. Comment organiser des milieux conviviaux de rencontre entre publics hétérogènes, non spécialisés et formes cinématographiques méconnues?

We introduce a notion of syntactical truth predicate (s.t.p.) for the second order arithmetic PA 2 . An s.t.p. is a set T of closed formulas such that: (i) T(t = u) if and only if the closed first order terms t and u are convertible, i.e., have the same value in the standard interpretation (ii) T(A → B) if and only if (T(A) $\Longrightarrow$ T(B)) (iii) T(∀ x A) if and only if (T(A[x ← t]) for any closed first (...) order term t) (iv) T(∀ X A) if and only if (T(A[X ←▵]) for any closed set definition $\triangle = \{x \mid D(x)\}$ ). S.t.p.'s can be seen as a counterpart to Tarski's notion of (model-theoretical) validity and have main model properties. In particular, their existence is equivalent to the existence of an ω-model of PA 2 , this fact being provable in PA 2 with arithmetical comprehension only. (shrink)

The present book is intended to help students overcome difficulties by presenting Jaspers' thoughts in comparatively clear and straightforward fashion. While it denies that philosophy is "practical" in any cheap and obvious sense, it follows Jaspers in attempting to avoid the otiose and emphasize the relevance of philosophy to matters of ultimate concern. Those who wish a more theoretical and systematic presentation may well call to mind that, as Heidegger's followers express it, Jaspers, like Kierkegaard- and to some extent Sartre- (...) quite deliberately spurned the "ontological" in favor of the "ontic.". (shrink)

This article poses the question of the social and intellectual conditions for genuine social scientific internationalism, through an analysis of the worldwide spread of a new global vulgate resulting from the false and uncontrolled universalization of the folk concepts and preoccupations of American society and academe. The terms, themes and tropes of this new planetary doxa - `multiculturalism', `globalization', `liberals versus communitarians', `underclass', racial `minority' and identity, etc. - tend to project and impose on all societies American concerns and viewpoints, (...) thereby transfigured into tools of analysis and yardsticks of policy fit to naturalize the peculiar historical experience of one peculiar society, tacitly instituted as a model for humanity. The article suggests how the logic of the international circulation of ideas, the transformations of the academic field, the strategies of foundations and publishers, and of local collaborators in global conceptual `import-export' converge to foster a particularly powerful and pernicious form of cultural imperialism of which academics are at once perpetrators and victims. (shrink)

I use the collection of “carnal ethnographies” of martial arts and combat sports assembled by Raul Sanchez and Dale Spencer under the title Fighting Scholars to spotlight the fruitfulness of deploying habitus as both empirical object (explanandum) and method of inquiry (modus cognitionis). The incarnate study of incarnation supports five propositions that clear up tenacious misconceptions about habitus and bolster Bourdieu’s dispositional theory of action: (1) far from being a “black box,” habitus is fully amenable to empirical inquiry; (2) the (...) distinction between primary (generic) and secondary (specific) habitus enables us to capture the malleability of dispositions; (3) habitus is composed of cognitive, conative and affective elements: categories, skills, and desires; (4) habitus allows us to turn carnality from problem to resource for the production of sociological knowledge; and (5) thus to realize that all social agents are, like martial artists, suffering beings collectively engaged in embodied activities staged inside circles of shared commitments. (shrink)

"A beautiful piece of work on the theory of altered states of consciousness ." "Stanislav Grof, M.D. author of Realms of the Human Unconsciousness".

À partir de textes officiels, de publications professionnelles et de représentations d’enseignantes d’EPS ayant vécu la mise en place de la mixité, cet article analyse la construction du genre en éducation physique durant les années 68. Si la mixité est d’abord évacuée au profit de l’officialisation sportive de l’éducation physique, les dissidences acquièrent une légitimité certaine durant la crise de mai-juin 68. Pourtant, l’organisation de l’EPS conserve une frontière et maintient les distinctions sexuées. Au terme des années 68, la mixité (...) n’est plus ignorée et les discriminations se sont déplacées. Elles sont paradoxalement le fruit des enseignantes elles-mêmes qui déconsidèrent la féminité au regard de leurs attentes sportives. (shrink)

In this paper I criticize the most significant recent examples of the practical knowledge analysis of knowledge-how in the philosophical literature: David Carr [1979, Mind, 88, 394–409; 1981a, American Philosophical Quarterly, 18, 53–61; 1981b, Journal of Philosophy of Education, 15(1), 87–96] and Stanley & Williamson [2001, Journal of Philosophy, 98(8), 411–444]. I stress the importance of know-how in our contemporary understanding of the mind, and offer the beginnings of a treatment of know-how capable of providing insight in to the use (...) of know-how in contemporary cognitive science. Specifically, I claim that Carr’s necessary conditions for know-how fail to capture the distinction he himself draws between ability and knowing-how. Moreover, Carr ties knowing-how to conscious intent, and to an explicit knowledge of procedural rules. I argue that both moves are mistakes, which together render Carr’s theory an inadequate account both of common ascriptions of knowledge-how and of widely accepted ascriptions of knowledge-how within explanations in cognitive science. Finally, I note that Carr’s conditions fail to capture intuitions (heshares) regarding the ascription of know-how to persons lacking ability. I then consider the position advocated by Stanley & Williamson (2001), which seems avoid Carr’s commitments to conscious intent and explicit knowledge while still maintaining that “knowledge-how is simply a species of knowledge-that" (Stanley & Williamson, 2001, p. 411). I argue that Stanley and Williamson’s attempt to frame a reductionist view that avoids consciously occurrent beliefs during exercises of knowledge-how and explicit knowledge of procedural rules is both empirically implausible and explanatorily vacuous. In criticizing these theories I challenge the presuppositions of the most pervasive response to Ryle in the philosophic literature, what might be described as “the received view." I also establish several facts about knowing-how. First, neither conscious intent nor explicit representation (much less conscious representation) of procedural rules are necessary for knowing-how given the theory of cognition current in cognitive science. I argue that the discussed analyses fail to capture the necessary conditions for knowledge-how because know-how requires the instantiation of an ability and of the capacities necessary for exploiting an ability—not conscious awareness of purpose or explicit knowledge of rules. Second, one must understand knowledge-how as task-specific, i.e., as presupposing certain underlying conditions. Conceiving of know-how as task-specific allows one to understand ascriptions of know-how in the absence of ability as counterfactual ascriptions based upon underlying competence. (shrink)