A reading of Kant’s viewpoint on objectivity is suggested that finds inspiration in the second part of the third Critique, on living systems. It develops the idea that the need to articulate the distinction between objectivity and subjectivity only emerges to the extent that something resists the anticipative procedures of a living, actively engaged being. The possibility of objective knowledge, so it is argued, rests on the possibility of developing an adequate orientation in a phenomenal world, i.e., the possibility of (...) actively distinguishing an “outside” from an “inside”—this not on the basis of an a priori principle, but by taking into account the punctual resistances and disappointments that appear within contingent encounters leading to pleasure and displeasure. We consider negation as a constitutive factor in the emergence of this very basic distinction, as well as in more elaborate and complex differentiations between objectivity and subjectivity. (shrink)

In their target article, O'Regan & Noë (O&N) give convincing arguments for there being no elaborate internal representation of the outside world. We show two more categories of empirical results that can easily be understood within the view that the world serves as an outside memory that is probed only when specific information is needed.

Many current neurophysiological, psychophysical, and psychological approaches to vision rest on the idea that when we see, the brain produces an internal representation of the world. The activation of this internal representation is assumed to give rise to the experience of seeing. The problem with this kind of approach is that it leaves unexplained how the existence of such a detailed internal representation might produce visual consciousness. An alternative proposal is made here. We propose that seeing is a way of (...) acting. It is a particular way of exploring the environment. Activity in internal representations does not generate the experience of seeing. The out- side world serves as its own, external, representation. The experience of seeing occurs when the organism masters what we call the gov- erning laws of sensorimotor contingency. The advantage of this approach is that it provides a natural and principled way of accounting for visual consciousness, and for the differences in the perceived quality of sensory experience in the different sensory modalities. Sev- eral lines of empirical evidence are brought forward in support of the theory, in particular: evidence from experiments in sensorimotor adaptation, visual “filling in,” visual stability despite eye movements, change blindness, sensory substitution, and color perception. (shrink)

As standardly conceived, an illusion is an experience of an object o appearing F where o is not in fact F. Paradigm examples of color illusion, however, do not fit this pattern. A diagnosis of this uncovers different sense of appearance talk that is the basis of a dilemma for the standard conception. The dilemma is only a challenge. But if the challenge cannot be met, then any conception of experience, such as representationalism, that is committed to the standard conception (...) is false. Perhaps surprisingly, naïve realism provides a better account of color illusion.An apparence ymaad by som Magyk. Chaucer. (shrink)

Putnam and Searle famously argue against computational theories of mind on the skeptical ground that there is no fact of the matter as to what mathematical function a physical system is computing: both conclude (albeit for somewhat different reasons) that virtually any physical object computes every computable function, implements every program or automaton. There has been considerable discussion of Putnam's and Searle's arguments, though as yet there is little consensus as to what, if anything, is wrong with these arguments. In (...) the present paper we show that an analogous line of reasoning can be raised against the numerical measurement (i.e., numerical representation) of physical magnitudes, and we argue that this result is a reductio ad absurdum of the challenge to computational skepticism. We then use this reductio to get clearer about both (i) what's wrong with Putnam's and Searle's arguments against computationalism, and (ii) what can be learned about both computational implementation and numerical measurement from the shortcomings of both sorts of skeptical argument. (shrink)

Franz Rosenzweig is widely regarded today as one of the most original and intellectually challenging figures within the so-called renaissance of German-Jewish thought in the Weimar period. The architect of a unique kind of existential theology, and an important influence upon such philosophers as Walter Benjamin, Martin Buber, Leo Strauss, and Emmanuel Levinas, Rosenzweig is remembered chiefly as a "Jewish thinker," often to the neglect of his broader philosophical concerns. Cutting across the artificial divide that the traumatic memory of National (...) Socialism has drawn between German and Jewish philosophy, this book seeks to restore Rosenzweig's thought to the German philosophical horizon in which it first took shape. It is the first English-language study to explore Rosenzweig's enduring debt to Hegel's political theory, neo-Kantianism, and life-philosophy; the book also provides a new, systematic reading of Rosenzweig's major work, _The Star of Redemption._ Most of all, the book sets out to explore a surprising but deep affinity between Rosenzweig’s thought and that of his contemporary, the German philosopher Martin Heidegger. Resisting both apologetics and condemnation, Gordon suggests that Heidegger’s engagement with Nazism should not obscure the profound and intellectually compelling bond in the once-shared tradition of modern German and Jewish thought. A remarkably lucid discussion of two notably difficult thinkers, this book represents an eloquent attempt to bridge the forced distinction between modern Jewish thought and the history of modern German philosophy—and to show that such a distinction cannot be sustained without doing violence to both. (shrink)

Before the law sits a gatekeeper. To this gatekeeper comes a man from the country who asks to gain entry into the law. But the gatekeeper says that he cannot grant him entry at the moment. The man thinks about it and then asks if he will be allowed to come in sometime later on. “It is possible,” says the gatekeeper, “but not now.”—Franz Kafka..

Mark Eli Kalderon presents an original study of perception, taking as its starting point a puzzle in Empedocles' theory of vision: if perception is a mode of material assimilation, how can we perceive colors at a distance? Kalderon argues that the theory of perception offered by Aristotle in answer to the puzzle is both attractive and defensible.

From the beginning to the end of his career, the critical theorist and Frankfurt School philosopher Theodor W. Adorno sustained an uneasy but enduring bond with existentialism. His attitude overall was that of unsparing criticism, often verging on polemic. In Kierkegaard he saw an early paragon for the late flowering of bourgeois solipsism; in Heidegger an impresario for a "jargon of authenticity" that cloaked its idealism in an aura of pseudo-concreteness and neo-romantic kitsch; even in the more rationalist tradition of (...) Husserl's phenomenology he detected a vain attempt of the bourgeois spirit to break free from the prison-house of immanent consciousness. Yet his enduring fascination with the philosophical canons of existentialism and phenomenology suggests a connection far more complicated and productive than mere antipathy. From his first published book on Kierkegaard's aesthetic to the mature studies in negative dialectics, Adorno was forever returning to the philosophies of bourgeois interiority, seeking the paradoxical relation between their manifest failure and their hidden promise. Scholars of critical theory often regard these philosophical adventures as unfortunate lapses into reductive sociology or as marginal to Adorno's path of intellectual development. In Adorno and Existence, Peter E. Gordon challenges this assumption, showing how the confrontation with existentialism helps us toward a deeper understanding of Adorno's own intellectual commitments. In lucid prose and with a dialectical sensitivity for the links between philosophy and life, Adorno and Existence casts new and unfamiliar light on this neglected chapter in the history of Continental philosophy.--. (shrink)

BackgroundThe idea that individuals are responsible for their health has been the focus of debate in the theoretical literature and in its concrete application to healthcare policy in many countries. Controversies persist regarding the form, substance and fairness of allocating health responsibility to the individual, particularly in universal, need-based healthcare systems.ObjectiveTo examine how personal health responsibility has been framed and rationalised in Norwegian key policy documents on priority setting.MethodsDocuments issued or published by the Ministry of Health and Care Services between (...) 1987 and 2018 were thematically analysed. We developed a predefined conceptual framework that guided the analysis. The framework included: the subject and object of responsibility, the level of conceptual abstraction, temporality, normative justificatory arguments and objections to the application of personal health responsibility.ResultsAs an additional criterion, personal health responsibility has been interpreted as relevant if: the patient’s harmful behaviour is repeated after receiving treatment, and if the success of the treatment is conditional on the patient’s behavioural change. When discussed as a retrospective criterion, considerations of reciprocal fairness have been dominant. When discussed as a prospective criterion, the expected benefit of treatment justified its relevance.ConclusionPersonal health responsibility appears to challenge core values of equality, inclusion and solidarity in the Norwegian context and has been repeatedly rejected as a necessary criterion for priority setting. However, the responsibility criterion seems to have some relevance in particular priority setting decisions. (shrink)

Shoemaker argues that one could not hold both that the qualitative character of colour experience is inherited from the qualitative character of the experienced colour and that there are faultless forms of variation in colour perception. In this paper, I explain what is meant by inheritance and discuss in detail the problematic cases of perceptual variation. In so doing I argue that these claims are in fact consistent, and that the appearance to the contrary is due to an optional and (...) controversial conception of experience that should be rejected. (shrink)

Readers of Theodor Adorno often have understood him as a "totalizing negativist." If it truly is the case that Adorno saw modern society as a realm of complete falsehood, however, his own social theory is unintelligible. In A Precarious Happiness, Peter E. Gordon aims to redeem Adorno from this negativist interpretation by showing that it arises from a basic misunderstanding of his work. Pushing against entrenched interpretations, Gordon argues that Adorno's philosophy is animated by a deep attachment to a concept (...) of happiness or human flourishing, and it is only by virtue of that normative standard that Adorno judges the world a catastrophic failure. Through a comprehensive reading of Adorno's work, A Precarious Happiness shows that in an imperfect world, the available standards of our flourishing are also imperfect. Looking beyond Adorno, Gordon suggests that the practice of social criticism, even if it is directed toward exposing what is "false," cannot succeed without appealing to an unrealized notion of what would be right. (shrink)

In their recent Opinion in TiCS, Yildirim and Paul propose that large language models (LLMs) have ‘instrumental knowledge’ and possibly the kind of ‘worldly’ knowledge that humans do. They suggest that the production of appropriate outputs by LLMs is evidence that LLMs infer ‘task structure’ that may reflect ‘causal abstractions of... entities and processes in the real world.' While we agree that LLMs are impressive and potentially interesting for cognitive science, we resist this project on two grounds. First, it casts (...) LLMs as agents rather than as models. Second, it suggests that causal understanding could be acquired from the capacity for mere prediction. (shrink)

and apply it to various examples of neural plasticity in which input is rerouted intermodally or intramodally to nonstandard cortical targets. In some cases but not others, cortical activity ‘defers’ to the nonstandard sources of input. We ask why, consider some possible explanations, and propose a dynamic sensorimotor hypothesis. We believe that this distinction is important and worthy of further study, both philosophical and empirical, whether or not our hypothesis turns out to be correct. In particular, the question of how (...) the distinction should be explained is linked to explanatory gap issues for consciousness. Comparative and absolute explanatory gaps should be distinguished: why does neural activity in a particular area of cortex have this qualitative expression rather than that, and why does it have any qualitative expression at all? We use the dominance/deference distinction to address the comparative gaps, both intermodal and intramodal. We do so not by inward scrutiny but rather by expanding our gaze to include relations between brain, body and environment. (shrink)

This is a book about the metaphysics of perception and discusses touch, audition, and vision. Though primarily concerned with the nature of perception, it draws heavily from the history of philosophy of perception, and connects the concerns of analytical and continental philosophers.

When Norm perceives a red tomato in his garden, Norm perceives the tomato and its sensible qualities.

Colors are sensible qualities. They are qualities that objects are perceived to have. Thus, when Norm, a normal perceiver, perceives a blue bead, the bead is perceived have a certain quality, perceived blueness. `Quality', here, is no mere synonym for property; rather, a quality is a kind of property a qualitative, as opposed to quan• titative, property. (The quantitative is a way of contrasting with the qualitative perhaps not the only way.).

Sight is a capacity, and seeing is its exercise. Reflection on the sense in which sight is for the sake of seeing reveals distinct relations of dependence between sight and seeing, the capacity and its exercise. Moreover, these relations of dependence in turn reveal the nature of our perceptual capacities and their exercise. Specifically, if sight is for the sake of seeing, then sight will depend, in a certain sense, upon seeing, in a manner inconsistent with experiential monism. Thus reflection (...) on the power of perception forms the basis of an argument for experiential pluralism. (shrink)

This clear, riveting book will be of great interest not only to philosophers and to historians of philosophy but also to anyone interested in the great ...

After an intensive 4-year process, the World Medical Association (WMA) has revised its International Code of Medical Ethics (ICoME). In their report outlining this process, Parsa-Parsi et al not only describe how the WMA sought to ‘cultivat[e] international agreement’ on a ‘global medical ethos’, but also outline the philosophical framework of the ICoME: how the WMA, as the ‘global representation of the medical profession’, created and revised the ICoME through the process of international professional self-regulation.1 However, there is a significant (...) tension to be found in this framework—one which contrasts the international scope of the ICoME with the supposed source of its legitimacy. Here, we seek to characterise this tension and the doubt which it casts on the legitimacy of the ICoME. (shrink)

Patients in nursing homes sometimes give accounts of episodes in which they feel their autonomy and/or self-respect are violated as a result of the care they receive from nursing staff. In these ethically difficult care situations nurses use strategies such as negotiation, explanation and, in some cases, restraint. This study investigates how nurses apply these strategies to resolve ethical dilemmas in such a way that patients experience respect rather than violation. Critical issues that will be discussed include the definition of (...) ethically difficult care situations in nursing homes and the identification of strategies for resolving such situations. Examples of the use of three strategies are presented. The use of negotiation, restraint and explanation are discussed in order to ensure respect for patients’ autonomy and thus to optimize health care outcomes. (shrink)

Video assistant referee was officially introduced into soccer regulations in 2018, after many years in which referee errors were justified as being “part of the game.” The technology’s penetration into the soccer field was accompanied by concerns and much criticism that, to a large degree, continues to be voiced with frequency. This paper argues that, despite fierce objections and extensive criticism, VAR represents an important revision in modern professional soccer, and moreover, it completes a moral revolution in the evolution of (...) the sport as a whole. Theoretically speaking, this technology enables an improvement in the sport’s professional standards and its public image and prestige, and especially its moral standards – Fair play. Furthermore, the introduction of this technology makes it possible to discover additional weaknesses (Standardization for extra time, a clear definition of a handball offense and more) that professional soccer regulations will probably be forced to address in the future. (shrink)

Sustainability assessments bring together different perspectives that pertain to sustainability in order to produce overall assessments and a wealth of approaches and tools have been developed in the past decades. But two major problematics remain. The problem of integration concerns the surplus of possibilities for integration; different tools produce different assessments. The problem of implementation concerns the barrier between assessment and transformation; assessments do not lead to the expected changes in practice. This paper aims to analyze issues of complementarity in (...) sustainability assessment and transformation as a key to better handling the problems of integration and implementation. Based on a generalization of Niels Bohr’s complementarity from quantum mechanics, we have identified two forms of complementarity in sustainability assessment, observer stance complementarity and value complementarity. Unlike many other problems of sustainability assessment, complementarity is of a fundamental character connected to the very conditions for observation. Therefore complementarity cannot be overcome methodologically; only handled better or worse. Science is essential to the societal goal of sustainability, but these issues of complementarity impede the constructive role of science in the transition to more sustainable structures and practices in food systems. The agencies of sustainability assessment and transformation need to be acutely aware of the importance of different perspectives and values and the complementarities that may be connected to these differences. An improved understanding of complementarity can help to better recognize and handle issues of complementarity. These deliberations have relevance not only for sustainability assessment, but more generally for transdisciplinary research on wicked problems. (shrink)

In this paper we argue that knowledge is characteristically safe true belief. We argue that an adequate approach to epistemic luck must not be indexed to methods of belief formation, but rather to explanations for belief. This shift is problematic for several prominent approaches to the theory of knowledge, including virtue reliabilism and proper functionalism (as normally conceived). The view that knowledge is characteristically safe true belief is better able to accommodate the shift in question.

Among the powers of living beings are intentional psychic powers, psychic powers that are of something. Thus, there is something seen, just as there is something feared or known. A puzzle arises when we consider whether these psychic powers might also be reflexive. Can these psychic powers be applied to themselves, or at least their exercise, such that the powers themselves, or their exercise, are their intentional objects? So, for example, in seeing what one does, and so being aware from (...) within that one thus sees, does one thereby see the seeing of it? An initial difficulty is that, in a range of familiar cases, the intentional object is distinct from the power and its exercise. The scene is distinct from the sight or seeing of it. Should this be a general feature of intentionality, then intentional powers are irreflexive. There is a potential tension, then, between the intentional character of psychic powers and their alleged reflexivity. This tension forms the basis of a puzzle or aporia that is at the heart of the Charmides. Part of what is at stake here is the coherence of perceptual self-consciousness, at least on an understanding of it. (shrink)

A puzzle about the presentation of objects located at a distance is seen to animate Aristotle's account of transparency in De Anima and De Sensu.

The 1929 between Martin Heidegger and Ernst Cassirer has long been viewed by intellectual historians as a paradigmatic event not only for its philosophical meaning but also for its apparently cultural-political ramifications. But such interpretations easily lend legitimacy to a broader and recently ascendant intellectual-historical trend that would reduce philosophy to an allegorical expression of ostensibly more or instrumentalist meanings. However, as this essay tries to show, the core of the dispute between Cassirer and Heidegger is irreducibly philosophical: the Davos (...) debate brought into focus the emergent themes of the so-called of the 1920s, and cast new light upon neo-Kantian doctrines as to the status of objectivity and the possibility for intersubjective consensus in both knowledge and ethics. The Davos encounter cannot be retroactively decided on political or cultural grounds, since it concerns just that unresolved tension between transcendentalism and hermeneutics that is itself constitutive of intellectual history as a discipline. (shrink)

Context: The problems that are most in need of interdisciplinary collaboration are “wicked problems,” such as food crises, climate change mitigation, and sustainable development, with many relevant aspects, disagreement on what the problem is, and contradicting solutions. Such complex problems both require and challenge interdisciplinarity. Problem: The conventional methods of interdisciplinary research fall short in the case of wicked problems because they remain first-order science. Our aim is to present workable methods and research designs for doing second-order science in domains (...) where there are many different scientific knowledges on any complex problem. Method: We synthesize and elaborate a framework for second-order science in interdisciplinary research based on a number of earlier publications, experiences from large interdisciplinary research projects, and a perspectivist theory of science. Results: The second-order polyocular framework for interdisciplinary research is characterized by five principles. Second-order science of interdisciplinary research must: 1. draw on the observations of first-order perspectives, 2. address a shared dynamical object, 3. establish a shared problem, 4. rely on first-order perspectives to see themselves as perspectives, and 5. be based on other rules than first-order research. Implications: The perspectivist insights of second-order science provide a new way of understanding interdisciplinary research that leads to new polyocular methods and research designs. It also points to more reflexive ways of dealing with scientific expertise in democratic processes. The main challenge is that this is a paradigmatic shift, which demands that the involved disciplines, at least to some degree, subscribe to a perspectivist view. Constructivist content: Our perspectivist approach to science is based on the second-order cybernetics and systems theories of von Foerster, Maruyama, Maturana & Varela, and Luhmann, coupled with embodied theories of cognition and semiotics as a general theory of meaning from von Uexküll and Peirce. (shrink)

Very often, objects in the scene before us are somehow perceived to be constant or uniform or unchanging in color, shape, size, or position, even while their appearance with respect to these features somehow changes. This is a familiar and pervasive fact about perception, even if it is notoriously difficult to describe accurately let alone adequately account for. These difficulties are not unrelated—how we are inclined to describ the phenomenology of perceptual constancy will affect how we are inclined to accoun (...) for it. (shrink)

I. Confronted with the acuteness of the socio-economic problems the two major labour organizations have in 1976 strengthened their «Common Trade Unions' Front» in view of their negotiations with employers and with the government, to which the trade unions have submitted a common platform.The common front, that has its antecedents on the local, regional and professional level has never been and never will be of a permanent nature, some sort of organic unit. Each confederation maintains its own identity and the (...) front is meant to be re-animated according to the circumstances.II. From the employers' side representatives of employers' organizations have «as a personal point of view» and, no doubt, as a preliminary approach, launched the idea that a new and very comprehensive «social pact» should be negotiated. The socialist trade unions clearly tend to reject this idea, since it maywell lead to a further integration in the capitalist system, whereas the christiandemocratic union seems to be rather in favour of such a pact.In the present state of affairs the probability that it be realized is rather low indeed. (shrink)

The debate on responsibility for health takes place within political philosophy and in policy setting. It is increasingly relevant in the context of rationing scarce resources as a substantial, and growing, proportion of diseases in high-income countries is attributable to lifestyle. Until now, empirical studies of medical professionals' attitudes towards personal responsibility for health as a component of prioritisation have been lacking. This paper explores to what extent Norwegian physicians find personal responsibility for health relevant in prioritisation and what type (...) of risk behaviour they consider relevant in such decisions. The proportion who agree that it should count varies from 17.1% to 26.9%. Higher age and being male is positively correlated with acceptance. The doctors are more willing to consider substance use in priority setting decisions than choices on food and exercise. The findings reveal that a sizeable proportion have beliefs that conflict with the norms stated in the Norwegian Patient Act. It may be possible that the implementation of legal regulations can be hindered by the opposing attitudes among doctors. A further debate on the role personal responsibility should play in priority setting seems warranted. However, given the deep controversies about the concept of health responsibility and its application, it would be wise to proceed with caution.Design Nationally representative cross-sectional study. Setting Panel-data. Participants 1072 respondents, response rate 65%. (shrink)

This conference is, in part, an expression of respect for Joseph Raz and his work from which we have all learned much. I thought it apt, then, to talk about Raz's (2001) views about respect as developed in chapter four of Value, Respect, and Attachment. Raz describes his views as having a Kantian origin. This might raise the eyebrow of some neo•Kantians or anyone inclined to interpret Kant as a formalist or as a constructivist. Nevertheless, I believe that Raz's views (...) and Kant's, properly interpreted and developed, have more in common than even Raz suspects. To bring this out, I will take up three questions that Raz raises concerning Kant's doctrine. (shrink)

Philodemus’s On Frank Criticism offers a unique conception of friendship that relies on frank speech, or truth-telling. The ability to have frank conversations with one another is the heart of a conception of friendship in which we are seen, heard, and acknowledged. This is the friendship through which we become better citizens and better selves. In particular, Philodemus is offering this truth-based friendship to students and their mentors. Yet, one would be hard put to find such trust and deep friendship (...) in the university philosophy classrooms of today. Our professionalized and content acquisition focused culture in the academy all too often inhibits fostering these kinds of relationships with our students. We begin the essay by tracing the roots of this kind of frank friendship in Plato’s Lysis, and then contextualize its emerging role in the ancient philosophical classroom by exploring its place in Philodemus’ Epicurean philosophical community at Herculaneum. We do so to see how such friendship moves beyond discourse and into practice. Next, we use Arendt and Foucault to unpack the public and private dimensions of frank friendship in the philosophical learning environment and its role in a good life and good politics. Finally, we show how the classroom practice of Modern Socratic Dialogue (MSD) can re-enliven frank friendship as a spiritual exercise in the contemporary university-philosophy classroom. Specifically, we argue that MSD is a particular method of dialogue suited for the public realm of friendship and that it contributes to the care of one’s soul, thus modeling in our classrooms a method of dialogue for both the public and private dimensions of life. (shrink)

Name der Zeitschrift: Cognitive Linguistics Jahrgang: 26 Heft: 2 Seiten: 261-287.

The present essay examines and critically discusses Paul Benacerraf's antiplatonist argument of "What Numbers Could Not Be." In the course of defending platonism against Benacerraf's semantic skepticism, I develop a novel platonist analysis of the content of arithmetic on the basis of which the necessary existence of the natural numbers and the nature of numerical reference are explained.

This essay discusses the new report, Heritable Human Genome Editing, by the National Academy of Medicine, the National Academy of Sciences, and the Royal Society. After summarizing the report, we argue that the report takes four quite bold steps away from prior reports, namely (1) rejecting an omnibus approach to heritable human genome editing (HHGE) in favor of a case‐by‐case analysis of possible uses of HHGE, accepting that HHGE is acceptable in some cases; (2) recognizing that the interest in having (...) children who are genetically related to both would‐be rearing parents is one that the regulation of HHGE should honor; (3) patterning a regulatory model for HHGE on the United Kingdom's approach to regulating mitochondrial replacement techniques; and (4) conveying skepticism that international regulation is possible while showing a strong preference for a default into national regulatory regimes for HHGE. (shrink)

Our reasons for emotions such as sadness, anger, resentment, and guilt often remain long after we cease experiencing these emotions. This is puzzling. If the reasons for these emotions persist, why do the emotions not persist? Does this constitute a failure to properly respond to our reasons? In this paper we provide a solution to this puzzle. Our solution turns on the close connection between the rationality of emotion and the rationality of attention, together with the differing reasons to which (...) attention and emotion are properly responsive. (shrink)

We argue that one can explain why the influence of illusions decreases during a movement without assuming that different visual representations are used for planning and control. The basis for this is that movements are guided by a combination of correctly perceived information about certain attributes (such as a target's position) and illusory information about other attributes (such as the direction of motion). We explain how this can automatically lead to a decreasing effect of illusions when hitting discs that move (...) in an illusory direction, and when grasping objects of which the apparent size or orientation has been changed by an illusion. (shrink)

The colors we perceive are the outcome of an attempt to meaningfully order the spectral information from the environment. These colors are not the result of a straightforward mapping of a physical property to a sensation, but arise from an interaction between our environment and our visual system. Thus, although one may infer from a surface’ reflectance characteristics that it will be perceived as “colored,” true colors only arise by virtue of the interaction of the reflected light with the eye (...) (and brain) of an observer. (shrink)