The material conditional and the suppositional analysis of the indicative conditional are based on different philosophical foundations and they leave important successes of their competitor unexplained. This paper unifies both accounts within a truth-functional, trivalent model of the suppositional analysis. In this model, we observe that the material and the suppositional conditional exhibit the same logical behavior while they have different truth conditions and different probabilities. The result is a unified semantic analysis that closes an important gap in the suppositional (...) story and explains the persistent appeal of the material conditional analysis for philosophers and psychologists of reasoning. (shrink)

A many-faceted beast, the metaphysics of relations can be approached from many angles. One could begin with the various ways in which relational states are expressed in natural language. If a more historical treatment is wanted, one could begin with Plato, Aristotle, or Leibniz. In the following, I will approach the topic by first drawing on Russell’s Principles of Mathematics (1903) (still a natural-enough starting point), and then turn to a discussion mainly of positionalism. The closing section contains an overview (...) of the six contributions to this Special Issue. (shrink)

Biologists and philosophers of science have recently called for an extension of evolutionary theory. This so-called ‘extended evolutionary synthesis’ seeks to integrate developmental processes, extra-genetic forms of inheritance, and niche construction into evolutionary theory in a central way. While there is often agreement in evolutionary biology over the existence of these phenomena, their explanatory relevance is questioned. Advocates of EES posit that their perspective offers better explanations than those provided by ‘standard evolutionary theory’. Still, why this would be the case (...) is unclear. Usually, such claims assume that EES’s superior explanatory status arises from the pluralist structure of EES, its different problem agenda, and a growing body of evidence for the evolutionary relevance of developmental phenomena. However, what is usually neglected in this debate is a discussion of what the explanatory standards of EES actually are, and how they differ from prevailing standards in SET. In other words, what is considered to be a good explanation in EES versus SET? To answer this question, we present a theoretical framework that evaluates the explanatory power of different evolutionary explanations of the same phenomena. This account is able to identify criteria for why and when evolutionary explanations of EES are better than those of SET. Such evaluations will enable evolutionary biology to find potential grounds for theoretical integration. (shrink)

The theory of technological mediation aims to take technological artifacts seriously, recognizing the constitutive role they play in how we experience the world, act in it, and how we are constituted as (moral) subjects. Its quest for a compatible ethics has led it to Foucault’s “care of the self,” i.e., a transformation of the self by oneself through self-discipline. In this regard, technologies have been interpreted as power structures to which one can relate through Foucaultian “technologies of the self” or (...) ascetic practices. However, this leaves unexplored how concrete technologies can actuallysupportthe process of self-care. This paper explores this possibility by examining one such technology: a gamified To-Do list app. Doing so, it first shows that despite the apparent straightforwardness of gamification, confrontation and shame play an important role in how the app motivates me to do better. Second, inspired by Ihde’s schema of human-technology relations, it presents different ways in which the app may confront me with myself. Subsequently, it accounts for the motivation and shame that this technologically mediated confrontation with myself invokes through a Levinasian account of ethical subjectivity. In so doing, it also shows how Levinas’ phenomenology implies a responsibility for self-care and how nonhuman, technological others may still call me to responsibility. It concludes with a reflection on the role of gamification in technologically mediated subjectivation and some implications for design. (shrink)

In recent years the idea that perceptual content is tensed in the sense that we can perceive objects as present or as past has come under attack. In this paper the notion of tensed content is to the contrary defended. The paper argues that assuming that something like an intentionalistic theory of perception is correct, it is very reasonable to suppose that perceptual content is tensed, and that a denial of this notion requires a denial of some intuitively very plausible (...) principles. The paper discusses some common objections against the notion of tensed content and concludes that none of them succeeds in showing that perceptual content cannot be tensed. (shrink)

This book provides for the first time a complete history of the doctrine of the transcendentals and shows its importance for the understanding of philosophy in the Middle Ages.

La recherche récente a régulièrement remis en cause la catégorie moderne de « lois sacrées » désignant des inscriptions grecques qui forment un ensemble mal défini. Cet article entend dépasser le corpus traditionnel des « lois sacrées » en présentant un projet de recueil alternatif de « Normes rituelles grecques » (CGRN pour l’acronyme anglais), qui s’appuie sur des critères plus sélectifs et sera publié en ligne.

BackgroundSharing de-identified individual-level health research data is widely promoted and has many potential benefits. However there are also some potential harms, such as misuse of data and breach of participant confidentiality. One way to promote the benefits of sharing while ameliorating its potential harms is through the adoption of a managed access approach where data requests are channeled through a Data Access Committee (DAC), rather than making data openly available without restrictions. A DAC, whether a formal or informal group of (...) individuals, has the responsibility of reviewing and assessing data access requests. Many individual groups, consortiums, institutional and independent DACs have been established but there is currently no widely accepted framework for their organization and function.Main textWe propose that DACs, should have the role of both promotion of data sharing and protection of data subjects, their communities, data producers, their institutions and the scientific enterprise. We suggest that data access should be granted by DACs as long as the data reuse has potential social value and provided there is low risk of foreseeable harms. To promote data sharing and to motivate data producers, DACs should encourage secondary uses that are consistent with the interests of data producers and their own institutions. Given the suggested roles of DACs, there should be transparent, simple and clear application procedures for data access. The approach to review of applications should be proportionate to the potential risks involved. DACs should be established within institutional and legal frameworks with clear lines of accountability, terms of reference and membership. We suggest that DACs should not be modelled after research ethics committees (RECs) because their functions and goals of review are different from those of RECs. DAC reviews should be guided by the principles of public health ethics instead of research ethics.ConclusionsIn this paper we have suggested a framework under which DACs should operate, how they should be organised, and how to constitute them. (shrink)

Ever since the 19th century, political parties and free media were widely deemed indispensable for the proper functioning of representative democracy. They constituted what one might call the criti...

This article considers the problem of how to elucidate the concept of nonsense. Viewed from a general philosophical standpoint this matters because the concept is used by certain philosophers in their criticism of philosophical questions and theses. I start with a presentation of examples of utterances considered nonsense, along with Baier's classification of kinds of nonsense. I then present various approaches, pointing out that none of them are completely satisfactory. I subsequently propose an approach that is a modification of the (...) austere conception: while consistent with the latter in that it treats nonsense as a lack of something, it differs by holding that a determination of the nature of various instances of nonsense can only be accomplished by examining how we show that some given utterance is nonsense. This approach places the emphasis on distinguishing the question of the meaninglessness of an utterance from the question of the incorrectness of linguistic expressions. The advantage of my conception is that on the one hand, it does not deny that there is an important non-psychological difference between philosophical nonsense and gibberish, while on the other it avoids the absurdity that philosophical utterances are nonsense because what they say is nonsensical. (shrink)

This publication forms a basis for the interdisciplinary development of a certification system for artificial intelligence. In view of the rapid development of artificial intelligence with disruptive and lasting consequences for the economy, society, and everyday life, it highlights the resulting challenges that can be tackled only through interdisciplinary dialogue between IT, law, philosophy, and ethics. As a result of this interdisciplinary exchange, it also defines six AI-specific audit areas for trustworthy use of artificial intelligence. They comprise fairness, transparency, autonomy (...) and control, data protection as well as security and reliability while addressing ethical and legal requirements. The latter are further substantiated with the aim of operationalizability. (shrink)

Extensionalist theories of the specious present suggest that every perceptual experience is extended in time for a short while, such that they are co-extensive in time with the time experienced in them. Thus, there can be no experience of time, unless the experience itself is extended in time. Accordingly, there must be something that unites the temporal parts of a perceptual experience into temporally extended wholes. I call this the “glue-problem for extensionalism”. In this paper I suggest three desiderata that (...) an extensionalist theory should meet in order to solve the glue-problem. I also distinguish between different versions of extensionalism, and argue that none of them can solve the glue-problem without violating at least one desideratum. (shrink)

Die vorliegende Publikation dient als Grundlage für die interdisziplinäre Entwicklung einer Zertifizierung von Künstlicher Intelligenz. Angesichts der rasanten Entwicklung von Künstlicher Intelligenz mit disruptiven und nachhaltigen Folgen für Wirtschaft, Gesellschaft und Alltagsleben verdeutlicht sie, dass sich die hieraus ergebenden Herausforderungen nur im interdisziplinären Dialog von Informatik, Rechtswissenschaften, Philosophie und Ethik bewältigen lassen. Als Ergebnis dieses interdisziplinären Austauschs definiert sie zudem sechs KI-spezifische Handlungsfelder für den vertrauensvollen Einsatz von Künstlicher Intelligenz: Sie umfassen Fairness, Transparenz, Autonomie und Kontrolle, Datenschutz sowie Sicherheit und (...) Verlässlichkeit und adressieren dabei ethische und rechtliche Anforderungen. Letztere werden mit dem Ziel der Operationalisierbarkeit weiter konkretisiert. (shrink)

This is the introduction and table of contents to the collected volume "Top-Down Causation and Emergence". It honours George F.R. Ellis and explains the parts and chapters of the volume.

Chiffi and Pietarinen (2020) argue that the knowability paradox disappears if we adopt the concept of conjecturability instead of knowability within the framework of Peirce’s theory of science. They make two main claims: first, conjecturability plays an all-important role in scientific inquiry and it explains better scientific progress than knowability; second, conjecturability does not produce aparadox akin to the knowability paradox. However, based on our reading of Peirce, we contend that knowability plays an important role in scientific inquiry and progress. (...) Moreover, we show that there is a conjecturability paradox with an analogous conclusion as the knowability paradox, which is rooted in their modal analysis of conjecturability. (shrink)

The argument has been made that future generations of human beings are being harmed unjustifiably by the actions individuals commit today. This paper addresses what it might mean to harm future generations, whether we might harm them, and what our duties toward future generations might be. After introducing the Global Health Impact (GHI) concept as a unit of measurement that evaluates the effects of human actions on the health of all organisms, an incomplete theory of human justice is proposed. Having (...) shown that the negative GHIs of our current generation cause unfair harm to future generations, I argue that each human being must be allocated a fair threshold of negative GHIs that should not be exceeded. By emphasising the need to consider all the GHIs of human actions, the theory of human justice developed here is highly relevant to evaluate human actions that might affect future generations, for example those related to climate change. (shrink)

Quentin Meillassoux descarta la cuestión de la correlación correcta en su Después de la finitud y en las publicaciones siguientes porque su trabajo tiene como objetivo refutar el correlacionismo. La pregunta central que planteo en el artículo es:¿ necesita la posición de Meillassoux algo más que un juego ontológico formal (y los realismos especulativos y los nuevos realismos en general)? Mi respuesta a esta pregunta será un no, pero creo que él y todos los realistas especulativos y nuevos realistas necesitan (...) una concepción de la conexión entre nosotros y las cosas que nos rodean. El artículo comienza examinando dos nociones centrales de la filosofía negativa de Meillassoux: correlación y ancestralidad. Este análisis elude dar una respuesta a la cuestión de por qué Meillassoux trata de evitar comprometerse con cuestiones tradicionales de epistemología, filosofía de la mente y ciencia. Después introduzco la noción de juego ontológico formal y presento un argumento (del experimento mental de la tabla periódica de las cosas) de por qué cualquier realista especulativo y nuevo realista debe abstenerse de declarar su ontología realista respectiva en la forma de este juego. El artículo concluye con cuatro preguntas que deben ser respondidas por Meillassoux y, por extensión, por cualquier filosofía que se esfuerce por ser un realismo especulativo o un nuevo realismo. (shrink)

Halpern and Pearl ([2005a], [2005b]) use the framework of structural equation models to define a notion of explanation that is based on actual causation. But while Halpern and Pearl’s definition of actual causation has been met with ample, often constructive, criticism, their subsequent definition of explanation has not faced similar scrutiny. It only underwent a slight reformulation by Halpern ([2016]). In this article, I will show that Halpern and Pearl’s definition of explanation is, despite many promising features, still problematic, even (...) if we presuppose adequately defined causal concepts. I will propose some changes to Halpern and Pearl’s definition and argue that those changes are able to resolve the revealed problems while maintaining all the benefits of their approach. (shrink)

Having recently emerged from the philosophical doldrums, the view that there are extrinsic dispositions has provoked questions about some aspects of their nature. One of the questions is whether causal bases of such dispositions would be extrinsic as well. Adopting the dominant causal conception of dispositional properties, I argue for the thesis of dispositional harmony, or for the proposition that dispositions agree with their bases in respect of intrinsicness (or lack thereof). The proposition is at odds with the claim that (...) the causal bases of extrinsic dispositions are intrinsic. As the claim was supported by appeal to the disposition of a key to open a door, I discuss the disposition, contending that it is intrinsic. Then I deflect a possible rejoinder by pointing out that the disposition is also multi-track. Dispositional harmony entails that if there were extrinsic dispositions, at least some extrinsic properties would be causally efficacious. (shrink)

Quentin Meillassoux dismisses the question of the right correlation both in his 'After finitude' and in subsequent publications because his work aims to refute correlationism. The central question I want to address in this article is: Does Meillassoux’s position (and the New Realisms more generally) need a correlation to be more than just a formal ontological game? My answer to this question will be a no, but I think that both his and other versions of speculative and new realism need (...) an interconnection between us and the things around us. (shrink)

The paper critically engages with some of the normative arguments in Julian Savulescu and Ingmar Persson’s book Unfit for the Future. In particular, it scrutinizes the authors’ argument in denial of a moral right to privacy as well as their political proposal to alter humankind’s moral psychology in order to avert climate change, terrorism and to redress global injustice.

Political theorists tend to dismiss the concept of constitutional patriotism for two main reasons. On the one hand, constitutional patriotism — understood as a post-national, universalist form of democratic political allegiance — is rejected on account of its abstract quality. On the otherhand, it is argued that constitutional patriotism, while apprearing universalist, is in fact particular through and through. According to this genealogical critique, it is held that constitutional patriotism might have been appropriate in the context when it originated — (...) namely West Germany, a half-nation with a deeply compromised sense of nationality on account of the Nazi past — but it is not universally applicable. This article reconstructs the origins of constitutional patriotism arguing that both the ‘protective’ and state-centred patriotism of Dolf Sternberger, and the ‘purifying’ patriotism of Jurgen Habermas — focused mainly on the public sphere — can indeed be understood as relying on ‘supplements of particularily’. However, there are also normative connections between universalist constitutional morality and militant democracy on the one hand, and universalist constitutionalist morality and an imperative to remember on the other. Thus, the genealogical critique by itself is insufficient to invalidate the idea of constitutional patriotism. (shrink)

Definition of the problem “Dual use” refers to the applicability of a research result or methods for purposes that concern the internal or external security of a society. This includes research that can be used for military, intelligence, terrorist, or criminal purposes. Dual use has been an increasingly aggravating problem for many areas of the life sciences and medicine for over a decade. The main cause for this is that many of their results are capable of demonstrating how humans, but (...) also (domestic) animals and plants, can be manipulated and attacked, and which tools are particularly suitable for this purpose. Arguments The digitalization in the life sciences has two distinguishable impacts on the dual-use problem: an intensifying and an expanding one. By enabling faster and more comprehensive research and development processes, digitalization exacerbates the existing dual-use problem because it increases the pace at which the results of this research can be utilized for security-related purposes. Moreover, the digitalization of the life sciences expands the dual-use problem, as some of the digital tools developed and used in the life sciences can themselves have military or security-relevant applications. Conclusion Therefore, a broad-based governance including wide participation of stakeholders in the research process and broader information on dual use in good scientific practice education across institutions, career stages, and disciplines is necessary. (shrink)

The issues that Paul Standish alerts us to are significant since they situate McDowell's argument in reference to works lying outside the mainstream tradition o.

ABSTRACT On 22 January 2001, the UK became the first country to approve of embryonic stem cell research by passing the Human Fertilisation (Research Purposes) Regulations 2001, which legislated new research purposes for which early embryos can be used, in addition to those approved by the Human Fertilisation and Embryology Act 1990. Legal advisory committees, most notably the Chief Medical Officer's Expert Group and the House of Lords’ Select Committee, have offered various reasons, which can also be found in the (...) ethics literature, to justify this change. Those examined here are the views that: 1. Early embryos lack relevant qualities (or ‘the argument from lack of qualities’) and 2. Early embryos only have a potentiality to become humans with moral status (or ‘the argument from potentiality’). The validity of these arguments is questioned and a case is made for egalitarian speciesism. Embryos have moral status (used here in the restricted sense of the status possessed by all members of the class of beings which deserve the greatest moral significance in equal measure). They have more value than the value that should be assigned to nonhuman beings from the start of fertilisation. Current UK legislation on embryo research is immoral. (shrink)

We say that a first order theoryTislocally finiteif every finite part ofThas a finite model. It is the purpose of this paper to construct in a uniform way for any consistent theoryTa locally finite theory FIN which is syntactically isomorphic toT.Our construction draws upon the main idea of Paris and Harrington [6] and generalizes the syntactic aspect of their result from arithmetic to arbitrary theories. The first mathematically strong locally finite theory, called FIN, was defined in [1]. Now we get (...) much stronger ones, e.g. FIN.From a physicalistic point of view the theorems of ZF and their FIN-counterparts may have the same meaning. Therefore FIN is a solution of Hilbert's second problem. It eliminates ideal objects from the proofs of properties of concrete objects.In [4] we will demonstrate that one can develop a direct finitistic intuition that FIN is locally finite. We will also prove a variant of Gödel's second incompleteness theorem for the theory FIN and for all its primitively recursively axiomatizable consistent extensions.The results of this paper were announced in [3]. (shrink)

As corporate social responsibility involves a voluntary business endeavour to address social and environmental issues beyond legal compliance, governments cannot fall back on hierarchical command-and-control policies to support it. As such, it is complementary with the increasing popularity of public policies known as New Governance policies, where the government is engaged in a horizontal inter-organizational network of societal actors and where public policy is both formed and executed by the interacting and voluntary efforts from a multitude of stakeholders. However, such (...) policies are known to generate substantive uncertainty about the content of CSR and its related issues, strategic uncertainty regarding the behavior of the actors involved and institutional uncertainty related to the interaction process involved in the institutional change. We explore New Governance policy instruments to address these uncertainties in the context CSR and discuss the experiences with these methods in the European Union. (shrink)

In the first part, the author sketches the problem of human existence as it appears in the texts of both philosophers. The second part enumerates all Patočka’s texts mentioning Jaspers as well as all of the works by Jaspers that we know Patočka reflected on. The third part traces in more detail Jaspers’ book Philosophical Faith, in which Patočka, in his own words, found “great stimuli”, and shows several links between Patočka’s own philosophy and the book (especially four themes: the (...) relation between philosophy and science; between philosophy and revealed religion; between philosophy and “non-philosophy”; between philosophy and history). The fourth part traces the idea of the origin of the free human act, which was explored by both Patočka and Jaspers. Finally, the article shows that despite similar or even identical lines of thought on certain topics – including a topic as fundamental as human freedom –, the authors offer two fundamentally different visions of reality that could be labelled as “ontology vs. metaphysics” or “the totality of the world vs. extra-worldly transcendence”. (shrink)

I present what I take to be the approach to property rights, in which property is basically a unitary concept: owners are the ones with the right to do, and prohibit others from doing, whatever there is to do with the thing owned, within the limits imposed by the rights of others to their things. I expound and defend the idea of in more or less Lockean mode. I also point to the many difficulties of application of the general idea, (...) leading to the need to negotiate at many points. For example, the vagueness of land ownership as we consider what goes on in the earth below or the sky above; to consideration of not just possible physical damages to others by virtue of ownership, but also aesthetic ones; and to the increasingly important area of intellectual property. I argue that the original idea continues to hold, though it underdetermines any number of specific issues. (shrink)

In this paper, I shall be concerned to explore the utilitarian account of promising, which for some time has had, in many circles, the status of a dead horse. My aim is not to flog it, however, but to show that perhaps it yet lives. At least, I hope to show that some prominent and apparently powerful objections to this account do not find their mark. In the course of this, several subjects of wider interest will come in for review (...) as well, and it is hoped that some further light on the utilitarian position in general, as well as the concepts of expectation and obligation, may glimmer forth.At the outset, some clarification of the question at issue about promising is essential. Briefly, the question is: why ought we to keep our promises? Less question-beggingly put: why, if at all, should we keep promises, and to what extent?; where by talk of ‘extent’ it is meant that the question of whether we sometimes should not keep them, of its being a matter of attaching a “degree of stringency” to the obligation, is to be kept open. (shrink)

Until Tarski’s semantic truth definition, the concept of truth was used informally in metalogic (metamathematics) or even proposed to be eliminated in favour of syntactic concepts, as in Rudolf Carnap’s early programme of philosophy via logical syntax. Tarski demonstrated that the concept of truth can be defined using precise mathematical devices. If L is a language for which the truth definition is given, it must be done in the metalanguage ML. According to this construction, semantics for L must be performed (...) in ML. The most important example concerns the arithmetic of natural numbers. According to Tarski’s theorem of undefinability, the set of truths of this theory cannot be defined in it – such a definition can be formulated in the metatheory. This fact illuminates the relation between syntax and semantics. If Th is a rich theory and presented as a syntactic theory (a calculus), its semantics is not reducible to its syntax. According to Tarski’s view, related to his work in the simple theory of types, semantics for L can be always constructed in the morphology of ML, provided that L is of the finite order. Two problems arise: what does the word “morphology” mean and how to formulate these ideas, when the framework is based on the distinction between first‑order logic and higher‑order logic. As far as the issue concerns morphology, it is possible to consider it as an extended syntax, i.e. vocabulary which does not refer to semantic concepts or defines such notions by not‑semantic, e.g. set‑theoretical, categories. If the hierarchy of logical types is replaced by the distinction of logics of various orders, in particular between first‑order and higher‑order (it is sufficient to use second‑order), it is possible to show that semantics of first‑order rich theories cannot be defined inside them. (shrink)

Definiensposition: Widerlegung einer Aussage oder Hypothese durch eine ihr widersprechende Beobachtungsaussage. Englische Definiensposition: disproof of a statement or hypothesis by an opposing observational statement.

Using the history classroom as a context for ethics and moral education is a long, but also contested, tradition. Recently, more emphasis has been put on how to incorporate ethics education, with this paper exploring the spaces of ethics and moral education in the history classroom. It is argued here that insights from moral philosophy and theories of historical consciousness, but – importantly – also moral psychology and the study of moral emotions, are needed to realise the potential of history (...) teaching and learning to support ethics education. Following this line, three spaces of ethics education in the history classroom are identified in this paper, including: reasoning about the moral quality of historical actors’ conduct; the use of historical empathy ; and reflection of the past’s moral meaning to the present and the future. As an example of how to implement this, a set of stimulus activities is presented that is designed for the classroom and a qualitative analysis of students’ responses that explicate expressions of students’ moral reasoning, perspective-taking, and historical consciousness. (shrink)

Jeffrey Friedman broaches a number of criticisms of Libertarianism as a conceptual basis for opposing the extensive modern welfare state, examining several variants and concluding that they are fundamentally unsupported. He opts for a “consequentialist” view of foundations. Nevertheless, he thinks that the modem welfare state is subject to effective critique along such lines. But rational contractarian individualism works and does provide foundations for libertarianism, while “consequentialism” is an ill‐defined theory.that is quite unpromising for the proposed critique; nevertheless, Friedman's empirical (...) and economic critique of the welfare state is valid. (shrink)

This translation is based on “Renesansowe koncepcje godności człowieka,” Roczniki Filozoficzne 35, no. 1 (1987): 251–81, with the Publisher’s permission.

This article delves into the multifaceted nature of pedagogy, examining its role as both a practical pursuit and an academic discipline concerned with education and upbringing. Positioned within the context of modernity, the overarching objective of pedagogy is framed as the cultivation of a free subject in communities of free people, emphasizing emancipation and participation. A key challenge is navigating the tension between purposes and facts, a core issue in human science pedagogy (Geisteswissenschaftliche Pädagogik). The authors propose a contextualized approach (...) to knowledge, introducing the concept of ‘situated knowledge’, emphasizing its directional aspect (‘purpose’) and the need for an understanding of the present reality (‘facts’). They highlight the significance of this approach in practice, in collective practice-development and in research. Situated knowledge is not certain knowledge, but the process of creating situated knowledge serves as an invitation to self-activity, encouraging the exercise and development of pedagogical tact. (shrink)

Philosophers often rely on sciences of their own time. This is especially true for scientists writing philosophical works. In the case of Ernst Mach, the scientific references are mainly to physics, physiology, evolutionary biology and—in a somewhat different manner—the new discipline of psychology. Like so many authors in the late 19th century, Mach had extreme confidence in the methods of the natural sciences. However, this trait, often called scientism or positivism, can easily be used in polemical accounts that obscure other (...) aspects of Mach’s thought. Mach is well-known for both his analysis of sensations and his evolutionary conception of perception and knowledge. The tension between the ambition to clarify the empirical basis of perception on the one hand and the focus on the natural origins of human perception on the other hand is, however, considerable. A comparison of these two perspectives can contribute to an ontological understanding of experience that sheds new light on the much-discussed topic of sense data and at the same time clarifies the difference between experience and observation and the role of experimental science in this context. In some respects, Mach seems closer to William James than to his followers in the Vienna circle. The accusation of idealism made by Lenin in his influential critique of positivism overlooks the implications of this naturalist approach but offers the occasion to dwell on the ontological implications of something that can be called natural historicity. Comparisons with Aristotle, Bacon, Descartes and Kant situate the empiricist theory of perception. (shrink)