In this paper I compare parametric and nonparametric regression models with the help of a simulated data set. Doing so, I have two main objectives. The first one is to differentiate five concepts of simplicity and assess their respective importance. The second one is to show that the scope of the existing philosophical literature on simplicity and model selection is too narrow because it does not take the nonparametric approach into account, S112–S123, 2002; Forster and Sober in The British Journal (...) for the Philosophy of Science 45, 1–35, 1994; Forster, 2001, in Philosophy of Science 74, 588–600, 2007; Hitchcock and Sober in The British Journal for the Philosophy of Science 55, 1–34, 2004; Mikkelson in Philosophy of Science 73, 440–447, 2006; Baker 2013). More precisely, I point out that a measure of simplicity in terms of the number of adjustable parameters is inadequate to characterise nonparametric models and to compare them with parametric models. This allows me to weed out false claims about what makes a model simpler than another. Furthermore, I show that the importance of simplicity in model selection cannot be captured by the notion of parametric simplicity. ‘Simplicity’ is an umbrella term. While parametric simplicity can be ignored, there are other notions of simplicity that need to be taken into consideration when we choose a model. Such notions are not discussed in the previously mentioned literature. The latter therefore portrays an incomplete picture of why simplicity matters when we choose a model. Overall I support a pluralist view according to which we cannot give a general and interesting justification for the importance of simplicity in science. (shrink)

My aim in this paper is to show how the problem of inflated effect sizes corrupts the severity measure of evidence. This has never been done. In fact, the Winner’s Curse is barely mentioned in the philosophical literature. Since the severity score is the predominant measure of evidence for frequentist tests in the philosophical literature, it is important to underscore its flaws. It is also crucial to bring the philosophical literature up to speed with the limits of classical testing. The (...) Winner’s Curse is one of them. The problem is that when a significant result is obtained by using an underpowered test, the severity score becomes particularly high for large discrepancies from the null-hypothesis. This means that such discrepancies are very well supported by the evidence according to that measure. However, it is now well documented that significant tests with low power display inflated effect sizes. They systematically show departures from the null hypothesis H0 that are much greater than they really are. From an epistemological point of view this means that a significant result produced by an underpowered test does not provide evidence for large discrepancies from H0. Therefore, the severity score is an inadequate measure of evidence. Given that we are now aware of the phenomenon of inflated effect sizes, it would be irresponsible to rely on the severity score to measure the strength of the evidence against the null. Instead, one must take appropriate measures to try and avoid using underpowered tests by setting a threshold for the sample size or by replicating the results of the experiment. (shrink)

It has been claimed that if statistical power and p-values are both used to measure the strength of our evidence for the null-hypothesis when the results of our tests are not significant, then they can also be used to derive inconsistent epistemic judgements as we compare two different experiments. Those problematic derivations are known as power approach paradoxes. The consensus is that we can avoid them if we abandon the idea that statistical power can measure the strength of our evidence. (...) In this paper however, I put forward a different solution. I argue that every power approach paradox rests on an equivocation on "strong evidence". The main idea is that we need to make a careful distinction between the evidence provided by the quality of the test and the evidence provided by the outcome of the test. Both provide different types of evidence and their respective strength are to be evaluated differently. (shrink)

The p value is the probability under the null hypothesis of obtaining an experimental result that is at least as extreme as the one that we have actually obtained. That probability plays a crucial role in frequentist statistical inferences. But if we take the word ‘extreme’ to mean ‘improbable’, then we can show that this type of inference can be very problematic. In this paper, I argue that it is a mistake to make such an interpretation. Under minimal assumptions about (...) the alternative hypothesis, I explain why ‘extreme’ means ‘outside the most precise predicted range of experimental outcomes for a given upper bound probability of error’. Doing so, I rebut recent formulations of recurrent criticisms against the frequentist approach in statistics and underscore the importance of random variables. (shrink)

In this paper I articulate a fictionalist solution to the closure problem that affects constructive empiricism. Relying on Stephen Yablo’s recent study of closure puzzles, I show how we can partition the content of a theory in terms of its truthmakers and claim that a constructive empiricist can believe that all the observable conditions that are necessary to make a part of her theory true obtain and remain agnostic about whether or not the other truthmakers for the other parts of (...) her theory obtain. This can be done even though she asserts her theory as if it was wholly true. (shrink)

In this paper, I compare theory-laden perceptions with imputed data sets. The similarities between the two allow me to show how the phenomenon of theory-ladenness can manifest itself in statistical analyses. More importantly, elucidating the differences between them will allow me to broaden the focus of the existing literature on theory-ladenness and to introduce some much-needed nuances.

The main point of this paper is to underscore that tests with very low power will be significant only if the observations are deviant under both H0 and H1. Therefore, the results of those significant tests will generate misleadingly high severity scores for differences between H0 and H1 that are excessively overestimated. In other words, that measure of evidence is bound to fail in those cases. It will inevitably fail to adequately measure the strength of the evidence provided by tests (...) with low power. (shrink)

The main point of this paper is to underscore the link between simplicity and truth in an unsupervised machine learning context. More precisely, we argue that parametric and dimensional simplicity are not indicators of truth but the methodological principle that urges us to pay attention to such notions of simplicity is truth conducive. The truth that we are looking for are specific geometrical shapes and we know which algorithm can find which shapes provided that we pay attention to parametric and (...) dimensional simplicity. (shrink)

In 1983, in an open letter to the journal Nature, Karl Popper and David Miller set forth a particularly strong critical argument which sought to demonstrate the impossibility of inductive probability. Since its publication the argument has faced many criticisms and we argue in this article that they do not reach their objectives. We will first reconstruct the demonstration made by Popper and Miller in their initial article and then try to evaluate the main arguments against it. Although it is (...) possible to conceptualize logically the idea of induction, it is shown that it is not possible on traditional Bayesian grounds. (shrink)

In 1983, in an open letter to the journal Nature, Karl Popper and David Miller set forth a particularly strong critical argument which sought to demonstrate the impossibility of inductive probability. Since its publication the argument has faced many criticisms and we argue in this article that they do not reach their objectives. We will first reconstruct the demonstration made by Popper and Miller in their initial article and then try to evaluate the main arguments against it. Although it is (...) possible to conceptualize logically the idea of induction, it is shown that it is not possible on traditional Bayesian grounds. (shrink)

The curse of dimensionality is one of the most prominent challenge that data scientists face when trying to make valuable inferences. It is an epistemic problem that hits particularly hard in "Big Data" research contexts, where the volume of the data set is particularly large. The way in which we tackle with this problem sheds light on the notion of scientific evidence. Yet, it is virtually absent from the current philosophical literature. In this paper, I aim to broaden the focus (...) of that literature by showing that the dimensions in which the data are embedded are an integral part of scientific evidence. This is an aspect of scientific evidence that is often hidden behind the traditional observation/theory dichotomy that we often encounter in philosophy of science. Dimensions are abstract objects. They are not observables like tables and chairs, nor are they entries in a data set. Ultimately, I aim to show that empirical adequacy is not merely a matter of finding the model that best fit the relevant observational data. It is also a matter of finding the model that best fit the relevant observational data inside the relevant dimensions. (shrink)

Machine learning is a scientific discipline that can be divided into two main branches: supervised machine learning and unsupervised machine learning. In this paper, we aim to show just how simplicity matters in unsupervised contexts. This is important because unsupervised machine learning algorithms have barely received any attention in philosophy. Yet, there is a direct link between simplicity and truth in unsupervised contexts that we do not find in their supervised counterparts. This has thus far evaded philosophical discussions on simplicity.

Classical statistical inferences have been criticised for various reasons. To assess the soundness of such criticisms is a very important task because they are widely used in everyday scientific research. This is one of the reasons why the philosophy of statistics is an exciting field of study. In this paper, I focus on two such criticisms. The first one claims that the use of the p-value violates the principle of total evidence. It is a thesis that has been defended by (...) Elliott Sober and Bengt Autzen. The second one says that the result of classical tests does not only depend on the data but on the sampling plan of the experimenter also. The underlying criticism of course is that the sampling plan is not part of the evidence and that classical tests therefore violate PTE. The intentions of the experimenter should not affect the result of an inference. My aim is to show that both criticisms are unsound. Doing so, I hope to clarify the concept of p-value and the nature of the evidence in classical statistical tests. The point of my paper is to show that the identification of the evidence on which those criticisms rest is inadequate. (shrink)

Pierre Bourdieu is arguably one of the twentieth century’s greatest socio-philosophical thinkers and his writings have much to offer anyone interested in the ways that people value, consume and produce architecture. Bourdieu spent much of his life attempting to understand cultural consumption and production through detailed empirical research that included studies of dwellings, art, museums, photography and aesthetics. This book introduces the architectural reader to Bourdieu’s key writings on culture and outlines the ways in which they offer powerful practical (...) tools and novel conceptual frameworks for understanding architectural value, taste, and practice. (shrink)

Synthesizing forty years' work by France's leading sociologist, this book exemplifies Bourdieu's unique ability to link sociological theory, historical information, and philosophical thought. It makes explicit the presuppositions of a state of 'scholasticism', a certain leisure liberated from the urgencies of the world. Philosophers have brought these presuppositions into the order of discourse, more to legitimate than analyze them, and this is the primary systematic, epistemological, ethical, and aesthetic error that Bourdieu subjects to methodological critique. Pascalian because he, too, was (...) concerned with symbolic power, he refused the temptation of foundationalist thinking, attended to 'ordinary people', and was determined to seek the reason for seemingly illogical behavior rather than simply condemning it. Bourdieu charts a negative philosophy, whose intellectual debt to such other 'heretical' philosophers as Wittgenstein, Austin, Dewey, and Peirce, renews traditional questioning of concepts of violence, power, time, history, the universal, and the purpose and direction of existence. (shrink)

The authors develop an analysis of education. They show how education carries an essentially arbitrary cultural scheme which is actually based on power. More widely, the reproduction of culture through education is shown to play a key part in the reproduction of the whole social system.

Cambrai, Bibl. munic. 940, ff. 1-59 [integralement reproduit]--Bibl. Vatic. Reg. Lat. 689 A, ff. 334-353.--Bibl. Vatic. Reg. Lat. 1653, ff, 1v-2v (feuilles de garde), ff. 3r, 29r-35r.--Pièces justificatives.

In Kant and the Demands of Self-Consciousness, Pierre Keller examines Kant's theory of self-consciousness and argues that it succeeds in explaining how both subjective and objective experience are possible. Previous interpretations of Kant's theory have held that he treats all self-consciousness as knowledge of objective states of affairs, and also that self-consciousness can be interpreted as knowledge of personal identity. By developing this striking new interpretation Keller is able to argue that transcendental self-consciousness underwrites a general theory of objectivity (...) and subjectivity at the same time. (shrink)

Bien des difficultés que nous éprouvons à comprendre les oeuvres philosophiques des Anciens proviennent souvent du fait que nous commmettons en les interprétant un double anachronisme: nous croyons que, comme beaucoup d'oeuvres modernes, elles sont destinées à communiquer des informations concernant un contenu conceptuel donné et que nous pouvons aussi en tirer directement des renseignements clairs sur la pensée et la psychologie de leur auteur. Mais en fait, elles sont très souvent des exercices spirituels que l'auteur pratique lui-même et fait (...) pratiquer à son lecteur. Elles sont destinées à former les âmes. Elles ont une valeur psychagogique. (shrink)

Recognized as a masterpiece of Nietzsche scholarship, NIETZSCHE AND THE VICIOUS CIRCLE is available here for the first time in English. Author Pierre Klossowski suggests that Nietzsche's ideas and beliefs did not stem from his personal pathology, but rather were applied in a pathological manner. Thereby Nietzsche's beliefs resonated dynamically and intellectually with his alternating lucidity and delirium.

We study one way in which stable phenomena can exist in an NIP theory. We start by defining a notion of ‘pure instability’ that we call ‘distality’ in which no such phenomenon occurs. O-minimal theories and the p-adics for example are distal. Next, we try to understand what happens when distality fails. Given a type p over a sufficiently saturated model, we extract, in some sense, the stable part of p and define a notion of stable independence which is implied (...) by non-forking and has bounded weight. (shrink)

In this 1999 book Pierre Keller examines the distinctive contributions, and the respective limitations, of Husserl's and Heidegger's approach to fundamental elements of human experience. He shows how their accounts of time, meaning, and personal identity are embedded in important alternative conceptions of how experience may be significant for us, and discusses both how these conceptions are related to each other and how they fit into a wider philosophical context. His sophisticated and accessible account of the phenomenological philosophy of (...) Husserl and the existential phenomenology of Heidegger will be of wide interest to students and specialists in these areas, while analytic philosophers of mind will be interested by the detailed parallels which he draws with a number of concerns of the analytic philosophical tradition. (shrink)

The involvement of developing countries in international clinical trials is necessary for the development of appropriate medicines for local populations. However, the absence of appropriate structures for ethical review represents a barrier for certain countries. Currently there is very little information available on existing structures dedicated to ethics in western and central Africa. This article briefly describes historical milestones in the development of networks dedicated to capacity building in ethical review in these regions and outlines the major conclusions of two (...) workshops on this issue, which were held in September and October 2002 in Libreville, Gabon, and Paris, France. The workshops were the culmination of collaboration between the African Malaria Network Trust (AMANET) and the Pan African Bioethics Initiative (PABIN). They produced an update on ethics organizations with regard to mission, function, activities, members, and contact people, in eight countries within the regions discussed. As a result of the commitment of mandated delegates, a further prominent outcome followed these workshops: the creation of national structures, where none existed before, dedicated to the ethical review of clinical trials. (shrink)

A presentation and discussion of Gottlob Frege's understanding of language, both natural and artificial, with close attention to his texts.

We propose a modular ontology of the dynamic features of reality. This amounts, on the one hand, to a purely spatial ontology supporting snapshot views of the world at successive instants of time and, on the other hand, to a purely spatiotemporal ontology of change and process. We argue that dynamic spatial ontology must combine these two distinct types of inventory of the entities and relationships in reality, and we provide characterizations of spatiotemporal reasoning in the light of the interconnections (...) between them. (shrink)

The French philosopher and intellectual historian Pierre Hadot (1922-2010) is known primarily for his conception of philosophy as spiritual exercise, which was an essential reference for the later Foucault. An aspect of his work that has received less attention is a set of methodological reflections on intellectual history and on the relationship between philosophy and history. Hadot was trained initially as a philosopher and was interested in existentialism as well as in the convergence between philosophy and poetry. Yet he (...) chose to become a historian of philosophy and produced extensive philological work on neo-Platonism and ancient philosophy in general. He found a philosophical rationale for this shift in his encounter with Wittgenstein's philosophy in the mid-1950s (Hadot was one of Wittgenstein's earliest French readers and interpreters). For Hadot, ancient philosophy must be understood as a series of language games, and each language game must be situated within the concrete conditions in which it happened. The reference to Wittgenstein therefore supports a strongly contextualist and historicist stance. It also supports its exact opposite: presentist appropriations of ancient texts are entirely legitimate, and they are the only way ancient philosophy can be existentially meaningful to us. Hadot addresses the contradiction by embracing it fully and claiming that his own practice aims at a coincidence of opposites (a concept borrowed from the Heraclitean tradition). For Hadot the fullest and truest way of doing philosophy is to be a philosopher and a historian at the same time. (shrink)

The aim of this paper is to provide some insights for a normative theory of corporate political activities. Such a theory aims to provide theoretical tools to investigate the legitimacy of corporate political involvement and allows us to determine which political activities and relations with government regulators are appropriate or inappropriate, permissible or impermissible, obligatory or forbidden for corporations. After having explored what I call the “normative presumption of legitimacy” of CPAs, this paper identifies three different plausible strategies to criticize (...) and object to corporate political involvement: the “egalitarian” strategy, the “corporate citizenship” strategy, and the “market failures” strategy. It constitutes an attempt to develop the market failures approach to reflect on CPAs. My main claim is that within such an account, the idea that corporations have a license to operate considerably limits their right to engage in political activities. (shrink)