Introduction Outbreaks of serious communicable infectious diseases remain a major global medical problem and force healthcare workers to make hard choices with limited information, resources and time. While information regarding physicians’ opinions about such dilemmas is available, research discussing students’ opinions is more limited. Methods Medical students were surveyed about their willingness to perform medical procedures on patients with communicable diseases as students and as physicians. Students were asked about their opinions regarding the duty to treat in such cases. Results (...) 74% of respondents felt that by deciding to enter medical school they were morally obliged to treat any patient despite the risks. Students’ willingness to treat as physicians is significantly higher than their willingness to treat as students. HIV was significantly the most tolerated disease with respect to performing mouth to mouth resuscitation. Among preclinical students, we found that willingness to treat during the later years is significantly greater than during the earlier years. Among clinical students, the opposite was observed. Discussion Students’ greater willingness to treat as physicians is mostly attributed to perceptions of higher obligations as a qualified doctor. There is greater but not total willingness to perform resuscitation on patients with HIV relative to other diseases. The increased willingness of preclinical students and the decreased willingness of clinical students both emphasise the importance of patient–physician communication and ethics studies during medical school. (shrink)

Introduction Outbreaks of serious communicable infectious diseases remain a major global medical problem and force healthcare workers to make hard choices with limited information, resources and time. While information regarding physicians’ opinions about such dilemmas is available, research discussing students’ opinions is more limited. Methods Medical students were surveyed about their willingness to perform medical procedures on patients with communicable diseases as students and as physicians. Students were asked about their opinions regarding the duty to treat in such cases. Results (...) 74% of respondents felt that by deciding to enter medical school they were morally obliged to treat any patient despite the risks. Students’ willingness to treat as physicians is significantly higher than their willingness to treat as students. HIV was significantly the most tolerated disease with respect to performing mouth to mouth resuscitation. Among preclinical students, we found that willingness to treat during the later years is significantly greater than during the earlier years. Among clinical students, the opposite was observed. Discussion Students’ greater willingness to treat as physicians is mostly attributed to perceptions of higher obligations as a qualified doctor. There is greater but not total willingness to perform resuscitation on patients with HIV relative to other diseases. The increased willingness of preclinical students and the decreased willingness of clinical students both emphasise the importance of patient--physician communication and ethics studies during medical school. (shrink)

This revised edition includes a new Preface outlining developments in Relevance Theory since 1986, discussing the more serious criticisms of the theory, and ...

Reason, we are told, is what makes us human, the source of our knowledge and wisdom. If reason is so useful, why didn't it also evolve in other animals? If reason is that reliable, why do we produce so much thoroughly reasoned nonsense? In their groundbreaking account of the evolution and workings of reason, Hugo Mercier and Dan Sperber set out to solve this double enigma. Reason, they argue with a compelling mix of real-life and experimental evidence, is not geared (...) to solitary use, to arriving at better beliefs and decisions on our own. What reason does, rather, is help us justify our beliefs and actions to others, convince them through argumentation, and evaluate the justifications and arguments that others address to us. In other words, reason helps humans better exploit their uniquely rich social environment. This interactionist interpretation explains why reason may have evolved and how it fits with other cognitive mechanisms. It makes sense of strengths and weaknesses that have long puzzled philosophers and psychologists--why reason is biased in favor of what we already believe, why it may lead to terrible ideas and yet is indispensable to spreading good ones.--. (shrink)

Dan Zahavi engages with classical phenomenology, philosophy of mind, and a range of empirical disciplines to explore the nature of selfhood. He argues that the most fundamental level of selfhood is not socially constructed or dependent upon others, but accepts that certain dimensions of the self and types of self-experience are other-mediated.

The relationship of self, and self-awareness, and experience: exploring classical phenomenological analyses and their relevance to contemporary discussions in ...

... Let me start my investigation by taking a brief look at the way in which self-awareness is expressed linguistically, as in the sentences "I am tired" or ...

It is commonly believed that Edmund Husserl (1859-1938), well known as the founder of phenomenology and as the teacher of Heidegger, was unable to free himself from the framework of a classical metaphysics of subjectivity. Supposedly, he never abandoned the view that the world and the Other are constituted by a pure transcendental subject, and his thinking in consequence remains Cartesian, idealistic, and solipsistic. The continuing publication of Husserl’s manuscripts has made it necessary to revise such an interpretation. Drawing upon (...) both Husserl’s published works and posthumous material, Husserl’s Phenomenology incorporates the results of the most recent Husserl research. It is divided into three parts, roughly following the chronological development of Husserl’s thought, from his early analyses of logic and intentionality, through his mature transcendental-philosophical analyses of reduction and constitution, to his late analyses of intersubjectivity and lifeworld. It can consequently serve as a concise and updated introduction to his thinking. (shrink)

Dan Zahavi presents a rich new study of the philosophy of Edmund Husserl, the founder of phenomenology. What kind of philosophical project was Husserl engaged in? What is ultimately at stake in so-called phenomenological analyses? In this volume Zahavi makes it clear why Husserl had such a decisive influence on 20th-century philosophy.

Short abstract (98 words). Reasoning is generally seen as a means to improve knowledge and make better decisions. However, much evidence shows that reasoning often leads to epistemic distortions and poor decisions. This suggests that the function of reasoning should be rethought. Our hypothesis is that the function of reasoning is argumentative. It is to devise and evaluate arguments intended to persuade. Reasoning so conceived is adaptive given humans’ exceptional dependence on communication and vulnerability to misinformation. A wide range of (...) evidence in the psychology of reasoning and decision making can be reinterpreted and better explained in the light of this hypothesis. (shrink)

The alleged for-me-ness or mineness of conscious experience has been the topic of considerable debate in recent phenomenology and philosophy of mind. By considering a series of objections to the notion of for-me-ness, or to a properly robust construal of it, this paper attempts to clarify to what the notion is committed and to what it is not committed. This exercise results in the emergence of a relatively determinate and textured portrayal of for-me-ness as the authors conceive of it.

Humans massively depend on communication with others, but this leaves them open to the risk of being accidentally or intentionally misinformed. To ensure that, despite this risk, communication remains advantageous, humans have, we claim, a suite of cognitive mechanisms for epistemic vigilance. Here we outline this claim and consider some of the ways in which epistemic vigilance works in mental and social life by surveying issues, research and theories in different domains of philosophy, linguistics, cognitive psychology and the social sciences.

Phenomenology: The Basics is a concise and engaging introduction to one of the dominant philosophical movements of the 20th century. This lively and lucid book provides an introduction to the essential phenomenological concepts that are crucial for understanding great thinkers such as Husserl, Heidegger, and Merleau-Ponty. Written by a leading expert in the field, Dan Zahavi examines and explains key questions such as: - What is a phenomenological analysis? - What are the methodological foundations of phenomenology? - What does phenomenology (...) have to say about embodiment and intersubjectivity? - How is phenomenology distinguished from, and related to, other fields in philosophy? - How do ideas from classic phenomenology relate to ongoing debates in psychology and qualitative research? With a glossary of key terms and suggestions for further reading, the book considers key philosophical arguments around phenomenology, making this an ideal starting point for anyone seeking a concise and accessible introduction to the rich and complex study of phenomenology. (shrink)

The question of whether a proper phenomenological investigation and analysis requires one to perform the epoché and the reduction has not only been discussed within phenomenological philosophy. It is also very much a question that has been hotly debated within qualitative research. Amedeo Giorgi, in particular, has insisted that no scientific research can claim phenomenological status unless it is supported by some use of the epoché and reduction. Giorgi partially bases this claim on ideas found in Husserl’s writings on phenomenological (...) psychology. In the present paper, I discuss Husserl’s ideas and argue that while the epoché and the reduction are crucial for transcendental phenomenology, it is much more questionable whether they are also relevant for a non-philosophical application of phenomenology. (shrink)

__Husserl and Transcendental Intersubjectivity __analyzes the transcendental relevance of intersubjectivity and argues that an intersubjective transformation of transcendental philosophy can already be found in phenomenology, especially in Husserl. Husserl eventually came to believe that an analysis of transcendental intersubjectivity was a _conditio sine qua non_ for a phenomenological philosophy. Drawing on both published and unpublished manuscripts, Dan Zahavi examines Husserl's reasons for this conviction and delivers a detailed analysis of his radical and complex concept of intersubjectivity, showing that precisely his (...) reflections on transcendental intersubjectivity are capable of clarifying the core-concepts of phenomenology, thus making possible a new understanding of Husserl’s philosophy. Against this background the book compares his view with the approaches to intersubjectivity found in Heidegger, Sartre, and Merleau-Ponty, and it then attempts to establish to what extent the phenomenological approach can contribute to the current discussion of intersubjectivity. This is achieved through a systematic confrontation with the language-pragmatical positions of Apel and Habermas. (shrink)

Drawing on the work of Scheler, Heidegger, Merleau-Ponty, Husserl and Sartre, this article presents an overview of some of the diverse approaches to intersubjectivity that can be found in the phenomenological tradition. Starting with a brief description of Scheler's criticism of the argument from analogy, the article continues by showing that the phenomenological analyses of intersubjectivity involve much more than a 'solution' to the 'traditional' problem of other minds. Intersubjectivity doesn't merely concern concrete face-to-face encounters between individuals. It is also (...) something that is at play in simple perception, in tool-use, in emotions, drives and different types of self-awareness. Ultimately, the phenomenologists would argue that a treatment of intersubjectivity requires a simultaneous analysis of the relationship between subjectivity and world. It is not possible simply to insert intersubjectivity somewhere within an already established ontology; rather, the three regions 'self', 'others', and 'world' belong together; they reciprocally illuminate one another, and can only be understood in their interconnection. (shrink)

One of the central questions within contemporary debates about collective intentionality concerns the notion and status of the we. The question, however, is by no means new. At the beginning of the last century, it was already intensively discussed in phenomenology. Whereas Heidegger argued that a focus on empathy is detrimental to a proper understanding of the we, and that the latter is more fundamental than any dyadic interaction, other phenomenologists, such as Stein, Walther and Husserl, insisted on the importance (...) of empathy for proper we-experiences. In this paper, I will present some of the key moves in this debate and then discuss and assess Husserl’s specific proposal, according to which reciprocal empathy, second-person engagement and self-alienation are all important presuppositions for group-identification and we-identity. (shrink)

Given the close relatedness of local issues, water scarcity, and sustainability, this research sought to investigate the factors affecting residents’ willingness to reuse direct and indirect potable water in the arid region. Utilizing the Bayesian Mindsponge Framework (BMF), an analysis was undertaken with a sample of 1,831 water consumers in the City of Albuquerque, the most populous city in New Mexico, United States. The primary analysis revealed positive associations between local concerns about drought or water scarcity and population growth with (...) residents' willingness to reuse direct and indirect potable water. Conversely, concerns about water quality and water bills were found to be negatively associated with the willingness to utilize directly and indirectly recycled water for drinking. In light of these findings, the study explores the potential of fostering an eco-surplus culture by cultivating a sense of environmental responsibility and acknowledging the relationship between local issues and environmental conditions. Simultaneously, the study proposes collaboration between the government and residents to promote water reuse programs to conserve water resources effectively. (shrink)

Simulationists have recently started to employ the term "empathy" when characterizing our most basic understanding of other minds. I agree that empathy is crucial, but I think it is being misconstrued by the simulationists. Using some ideas to be found in Scheler's classical discussion of empathy, I will argue for a different understanding of the notion. More specifically, I will argue that there are basic levels of interpersonal understanding - in particular the understanding of emotional expressions - that are not (...) explicable in terms of simulation-plus-projection routines. (shrink)

The article takes issue with the proposal that dominant accounts of collective intentionality suffer from an individualist bias and that one should instead reverse the order of explanation and give primacy to the we and the community. It discusses different versions of the community first view and argues that they fail because they operate with too simplistic a conception of what it means to be a self and misunderstand what it means to be (part of) a we. In presenting this (...) argument, the article seeks to demonstrate that a thorough investigation of collective intentionality has to address the status and nature of the we, and that doing so will require an analysis of the relation between the we and the I, which in turn will call for a more explicit engagement with the question of selfhood than is customary in contemporary discussions of collective intentionality. (shrink)

The question of whether a proper phenomenological investigation and analysis requires one to perform the epoché and the reduction has not only been discussed within phenomenological philosophy. It is also very much a question that has been hotly debated within qualitative research. Amedeo Giorgi, in particular, has insisted that no scientific research can claim phenomenological status unless it is supported by some use of the epoché and reduction. Giorgi partially bases this claim on ideas found in Husserl’s writings on phenomenological (...) psychology. In the present paper, I discuss Husserl’s ideas and argue that while the epoché and the reduction are crucial for transcendental phenomenology, it is much more questionable whether they are also relevant for a non-philosophical application of phenomenology. (shrink)

Drawing on philosophy, neuroscience, and artificial intelligence, Simple Minds explores the construction of the mind from the matter of the brain.

The central problem for pragmatics is that sentence meaning vastly underdetermines speaker’s meaning. The goal of pragmatics is to explain how the gap between sentence meaning and speaker’s meaning is bridged. This paper defends the broadly Gricean view that pragmatic interpretation is ultimately an exercise in mind-reading, involving the inferential attribution of intentions. We argue, however, that the interpretation process does not simply consist in applying general mind-reading abilities to a particular (communicative) domain. Rather, it involves a dedicated comprehension module, (...) with its own special principles and mechanisms. We show how such a metacommunicative module might have evolved, and what principles and mechanisms it might contain. (shrink)

Drawing on the work of Scheler, Heidegger, Merleau-Ponty, Husserl and Sartre, this article presents an overview of some of the diverse approaches to intersubjectivity that can be found in the phenomenological tradition. Starting with a brief description of Scheler’s criticism of the argument from analogy, the article continues by showing that the phenomenological analyses of intersubjectivity involve much more than a ‘solution’ to the ‘traditional’ problem of other minds. Intersubjectivity doesn’t merely concern concrete faceto-face encounters between individuals. It is also (...) something that is at play in simple perception, in tool-use, in emotions, drives and different types of self-awareness. Ultimately, the phenomenologists would argue that a treatment of intersubjectivity requires a simultaneous analysis of the relationship between subjectivity and world. It is not possible simply to insert intersubjectivity somewhere within an already established ontology; rather, the three regions ‘self’, ‘others’, and ‘world’ belong together; they reciprocally illuminate one another, and can only be understood in their interconnection. (shrink)

Recent years have seen an upsurge of interest in the second-person perspective, not only in philosophy of mind, language, law and ethics, but also in various empirical disciplines such as cognitive neuroscience and developmental psychology. A distinctive and perhaps also slightly puzzling feature of this ongoing discussion is that whereas many contributors insist that a proper consideration of the second-person perspective will have an impact on our understanding of social cognition, joint action, communication, self-consciousness, morality, and so on, there remains (...) considerable disagreement about what exactly a second-person perspective amounts to (see Eilan 2014; Conant and Rödl 2014). What is the difference between adopting a second-person and a third-person perspective on another? How does one relate to another as a you and how does that differ from relating to another as a he, she or they? In the following, I will consider three different proposals and argue that a promising but somewhat overlooked account can be found in the work of Husserl. (shrink)

When it comes to understanding the nature of social cognition, we have—according to the standard view—a choice between the simulation theory, the theory-theory or some hybrid between the two. The aim of this paper is to argue that there are, in fact, other options available, and that one such option has been articulated by various thinkers belonging to the phenomenological tradition. More specifically, the paper will contrast Lipps' account of empathy—an account that has recently undergone something of a revival in (...) the hands of contemporary simulationists—with various accounts of empathy found in the phenomenological tradition. I discuss the way Lipps was criticized by Scheler, Stein and Husserl, and outline some of the core features of their, at times divergent, alternatives. I then proceed by considering how their basic take on empathy and social cognition was taken up and modified by Schutz—a thinker whose contribution to the analysis of interpersonal understanding has been unjustly neglected in recent years. (shrink)

Using the concept of social denial, this article puts the American Psychological Association's (APA’s) pattern of willful blindness, identified by independent reviewer David Hoffman, in historical context by examining the contributions of Cold War social scientists to the CIA's KUBARK torture manual, and discusses the implications of this history for the reform of the APA's ethics policies. David Hoffman found that the leadership of the APA colluded with Department of Defense (DoD) to ensure that the APA's ethical policies were no (...) stronger than those issued by the DoD. While the independent reviewer did not find evidence of collaboration between the CIA and the APA, this was not due to a lack of effort on the part of the APA, which was anxious to establish good relations and so promote the use of psychology in the national security arena. While Hoffman did not find that the APA knew that its collaborations would facilitate the development of abusive interrogation techniques, it showed a marked, motivated lack of interest in whether or not the DoD or CIA was abusing prisoners. The APA maintained its strategic ignorance even while engaging in a public relations campaign designed to give the impression that it was deeply concerned about multiple reports of psychologist involvement in a system of torture. This willful ignorance was not unprecedented and follows a predictable pattern of knowing and not-knowing to which all psychologists should attend. (shrink)

Prudential hedonism has been beset by many objections, the strength and number of which have led most modern philosophers to believe that it is implausible. One objection in particular, however, is nearly always cited when a philosopher wants to argue that prudential hedonism is implausible—the experience machine objection to hedonism. This paper examines this objection in detail. First, the deductive and abductive versions of the experience machine objection to hedonism are explained. Following this, the contemporary responses to each version of (...) the argument are assessed and the deductive version is argued to be relatively ineffective compared to the abductive version. Then, a taxonomy of the contemporary critical responses to the abductive version is created. Consideration of these responses shows that the abductive version of the objection is fairly powerful, but also that one type of response seems promising against it. This response argues that experience machine thought experiments seem to elicit judgments that are either too biased to be used as evidence for the objection or not obviously in favour of reality. It is argued that only this type of refutation seems likely to convince proponents of the abductive version that the objection is much weaker than they believe it to be. Finally, it is suggested that more evidence is required before anything definitive can be said on the matter. (shrink)

The article explores and compares the accounts of empathy found in Lipps, Scheler, Stein and Husserl and argues that the three latter phenomenological thinkers offer a model of empathy, which is not only distinctly different from Lipps’, but which also diverge from the currently dominant models.

Review of Philosophy and Psychology has lately published a number of papers that in various ways take issue with and criticize my work on the link between consciousness, self-consciousness and selfhood. In the following contribution, I reply directly to this new set of objections and argue that while some of them highlight ambiguities in my work that ought to be clarified, others can only be characterized as misreadings.

We demonstrate that an unlexicalized PCFG can parse much more accurately than previously shown, by making use of simple, linguistically motivated state splits, which break down false independence assumptions latent in a vanilla treebank grammar. Indeed, its performance of 86.36% (LP/LR F1) is better than that of early lexicalized PCFG models, and surprisingly close to the current state-of-theart. This result has potential uses beyond establishing a strong lower bound on the maximum possible accuracy of unlexicalized models: an unlexicalized PCFG is (...) much more compact, easier to replicate, and easier to interpret than more complex lexical models, and the parsing algorithms are simpler, more widely understood, of lower asymptotic complexity, and easier to optimize. (shrink)

This paper is a warning that objections based on thought experiments can be misleading because they may elicit judgments that, unbeknownst to the judger, have been seriously skewed by psychological biases. The fact that most people choose not to plug in to the Experience Machine in Nozick’s (1974) famous thought experiment has long been used as a knock-down objection to hedonism because it is widely thought to show that real experiences are more important to us than pleasurable experiences. This paper (...) argues that the commonplace choice to remain in reality when offered a life in the Experience Machine is best explained by status quo bias – the irrational preference for things to remain the same. An alternative thought experiment, empirical evidence, and discussion of how psychological biases can affect our judgments are provided to support this argument. (shrink)

In recent years, more and more people have started talking about the necessity of reconciling phenomenology with the project of naturalization. Is it possible to bridge the gap between phenomenological analyses and naturalistic models of consciousness? Is it possible to naturalize phenomenology? Given the transcendental philosophically motivated anti-naturalism found in many phenomenologists such a naturalization proposal might seem doomed from the very start, but in this paper I will examine and evaluate some possible alternatives.

Modern reflection about the good life and the good society has been dominated by a spirit of liberal optimism, according to which people typically know what’s good for them and make prudent choices in pursuit of their interests. As a result, people tend to do best, and pretty well at that, when given the greatest possible freedom to live as they wish. This appealing doctrine rests on a bold assumption about human psychology: namely, that people have a high degree of (...) aptitude for securing their well-being given arbitrarily high levels of “option freedom.” Yet a large body of empirical research suggests that people are systematically prone to make a variety of serious errors in the pursuit of happiness. These errors are probably serious enough to place liberal optimism’s psychological assumptions in doubt. If people do tend to fare best in the option-rich environments traditionally favored by liberal moderns, notably classical economists, this may not be mainly through the prudent exercise of choice. Or perhaps human beings actually benefit from certain constraints or burdens on choice. (shrink)

If we want to assess whether or not a naturalized phenomenology is a desideratum or a category mistake, we need to be clear on precisely what notion of phenomenology and what notion of naturalization we have in mind. In the article I distinguish various notions, and after criticizing one type of naturalized phenomenology, I sketch two alternative takes on what a naturalized phenomenology might amount to and propose that our appraisal of the desirability of such naturalization should be more positive, (...) if we opt for one or both of the latter alternatives. (shrink)

In two experiments, we investigated whether 13-month-old infants expect agents to behave in a way consistent with information to which they have been exposed. Infants watched animations in which an animal was either provided information or prevented from gathering information about the actual location of an object. The animal then searched successfully or failed to retrieve it. Infants’ looking times suggest that they expected searches to be effective when—and only when—the agent had had access to the relevant information. This result (...) supports the view that infants’ possess an incipient metarepresentational ability that permits them to attribute beliefs to agents. We discuss the viability of more conservative explanations and the relationship between this early ability and later forms of ‘theory of mind’ that appear only after children have become experienced verbal communicators. (shrink)

Since its inception, phenomenological philosophy has exerted an influence on empirical science. But what is the best way to practice, use and apply phenomenology in a non‐philosophical context? How deeply rooted in phenomenological philosophy must qualitative research be in order to qualify as phenomenological? How many of the core commitments of phenomenology must it accept? In the following contribution, I will take a closer look at Max van Manen's work. I will argue that van Manen's understanding of and presentation of (...) phenomenology is quite problematic and that his book Phenomenology of Practice rather than amounting to a clear and accessible presentation of the phenomenological method that would make it do‐able to researchers who are not themselves professional philosophers is in fact both abstruse and excessively complicated. I will then turn to nursing, and by taking that as my example, outline a better way to apply and practice phenomenology. (shrink)

If the self—as a popular view has it—is a narrative construction, if it arises out of discursive practices, it is reasonable to assume that the best possible avenue to self-understanding will be provided by those very narratives. If I want to know what it means to be a self, I should look closely at the stories that I and others tell about myself, since these stories constitute who I am. In the following I wish to question this train of thought. (...) I will argue that we need to operate with a more primitive and fundamental notion of self; a notion of self that cannot be captured in terms of narrative structures. In a parallel move, I will argue that there is a crucial dimension of what it means to be other that is equally missed by the narrative approach. I will consequently defend the view that there are limits to the kind of understanding of self and others that narratives can provide. (shrink)

This the tenth volume in the Vancouver Studies in Cogntive Science series. It concerns metarepresentation: the construction and use of representations that represent other representations. Metarepresentations are ubiquitous among human beings, whenever we think or talk about mental states or linguistic acts, or theorize about the mind or language. It is crucial to the unconscious process we use to divine the mental states of others, and ultimately to any workable theory of the mind. This volume collects previously unpublished studies on (...) the subject by an interdisciplinary group of contributors, including: Daniel Dennett, Alvin Goldman, Keith Lehrer, Leda Cosmides and John Tooby. (shrink)

Recently, a number of neuroscientists and philosophers have taken the so-called predictive coding approach to support a form of radical neuro-representationalism, according to which the content of our conscious experiences is a neural construct, a brain-generated simulation. There is remarkable similarity between this account and ideas found in and developed by German neo-Kantians in the mid-nineteenth century. Some of the neo-Kantians eventually came to have doubts about the cogency and internal consistency of the representationalist framework they were operating within. In (...) this paper, I will first argue that some of these concerns ought to be taken seriously by contemporary proponents of predictive coding. After having done so, I will turn to phenomenology. As we shall see, Husserl’s endorsement of transcendental idealism was partially motivated by his rejection of representationalism and phenomenalism and by his attempt to safeguard the objectivity of the world of experience. This confronts us with an intriguing question. Which position is best able to accommodate our natural inclination for realism: Contemporary neuro-representationalism or Husserl’s transcendental idealism? (shrink)

The idea that there are some facts that call for explanation serves as an unexamined premise in influential arguments for the inexistence of moral or mathematical facts and for the existence of a god and of other universes. This book is the first to offer a comprehensive and critical treatment of this idea. It argues that calling for explanation is a sometimes-misleading figure of speech rather than a fundamental property of facts.