Bohr as a Phenomenological Realist

There is confusion among scholars of Bohr as to whether he should be categorized as an instrumentalist (see Faye 1991) or a realist (see Folse 1985). I argue that Bohr is a realist, and that the confusion is due to the fact that he holds a very special view of realism, which did not coincide with the philosophers’ views. His approach was sometimes labelled instrumentalist and other times realist, because he was an instrumentalist on the theoretical level, but a realist on the level of models. Such a realist position is what I call phenomenological realism. In this paper, and by taking Bohr’s debate with Einstein as a paradigm, I try to prove that Bohr was such a realist.

I. Frege as a Realist

H. Sluga (Inquiry, Vol. 18 [1975], No. 4) has criticized me for representing Frege as a realist. He holds that, for Frege, abstract objects were not real: this rests on a mistranslation and a neglect of Frege's contextual principle. The latter has two aspects: as a thesis about sense, and as one about reference. It is only under the latter aspect that there is any tension between it and realism: Frege's later silence about the principle is due, not to his realism, but to his assimilating sentences to proper names. Contrary to what Sluga thinks, the conception of the Bedeutung of a name as its bearer is an indispensable ingredient of Frege's notion of Bedeutung, as also is the fact that it is in the stronger of two possible senses that Frege held that Sinn determines Bedeutung. The contextual principle is not to be understood as meaning that thoughts are not, in general, complex; Frege's idea that the sense of a sentence is compounded out of the senses of its component words is an essential component of his theory of sense. Frege's realism was not the most important ingredient in his philosophy: but the attempt to interpret him otherwise than as a realist leads only to misunderstanding and confusion.     

Interpreting Thomas Kuhn as a Response-Dependence Theorist

Abstract

Thomas Kuhn is the most famous historian and philosopher of science of the last century. He is also among the most controversial. Since Kuhn’s death, his corpus has been interpreted, systematized, and defended. Here I add to this endeavor in a novel way by arguing that Kuhn can be interpreted as a global response-dependence theorist. He can be understood as connecting all concepts and terms in an a priori manner to responses of suitably situated subjects to objects in the world. Further, I claim, this interpretation is useful for three reasons. First, it allows us to systematize and defend Kuhn’s views. We can therefore better appreciate him as a thinker in his own right. Second, it deepens our understanding of both the uniqueness of Kuhn’s views and the continuity of those views with those of others. We can therefore better appreciate his place in history. And third, as I explain in the paper, my interpretation affords us the only example of an ethnocentric global response-dependence theory. We can therefore better appreciate the versatility of response-dependence itself.     

Perspectival representation and fallacies in metaethics

Abstract

The prevailing theoretical framework for theorising about representation construes all representation as involving objective representational contents. This classic framework has tended to drive philosophers either to claim that evaluative judgements are representations and therefore objective, or else to claim that evaluative judgements are not really representations, because they are not objective. However, a more general, already well-explored framework is available, which will allow theorists to treat evaluative judgements as full-fledged representations (thus doing justice to their representational aspects) while leaving open whether they are objective. Such a more general conception of representational content is exemplified, e.g. by Lewis’s ‘centred contents’ and Gibbard’s framework of ‘contents of judgement’, thus it is not new. I shall start in §1 by introducing the more general framework of perspectival contents and then illustrate in §2 how awareness of it can help expose the fallaciousness of certain widely used forms of argumentation in metaethics.     

Perspectival Direct Reference for Proper Names

I defend what I believe to be a new variation on Kripkean themes, for the purpose of providing an improved way to understand the referring functions of proper names. I begin by discussing roles played by perceptual perspectives in the use of proper names, and then broaden the discussion to include what I call “cognitive perspectives.” Although both types of perspectives underwrite the existence of intentional intermediaries between proper names and their referents, the existence of these intentional intermediaries does not entail that a Kripke-inspired view of direct reference must be abandoned. At the same time, the existence of these intermediaries can be seen to play illuminating roles as regards the referring functions of proper names in the following types of cases, among others: (a) where different names pick out the same subject; (b) where names are empty. Along the way, I argue that “perspectival views” are not something “inside the head” of language users as intended by Putnam in his well-known discussion of meaning.     

Perspectival Variance and Worldly Fragmentation

Objects often manifest themselves in incompatible ways across perspectives that are epistemically on a par. The standard response to such cases is to deny that the properties that things appear to have from different perspectives are properties that things really have out there. This type of response seems worrying: too many properties admit of perspectival variance and there are good theoretical reasons to think that such properties are genuinely instantiated. So, we have reason to explore views on which things can have the incompatible properties they appear to have across perspectives. This paper explores the view that things can have incompatible properties if the world is not a metaphysically unified place but is instead fragmented. There is a sensible notion of co-obtainment, on which two facts can each obtain without co-obtaining. Using this notion, we can step back from our embedded perspectives on the world without deeming the contents of those perspectives to be mere appearances. This renders the sheer pervasiveness of perspectival variance a serious pressure on the standard response, as well as a serious reason to think that the world is indeed fragmented.     

Perspectival Realism and Incompatible Models

I discuss the prospects of perspectival realism for resolving the problem of incompatible models or theories in scientific practice. My diagnosis is that the perspectivist can secure the ‘realism’ in her position only by employing suitable relations between the models. It is such relations that do the work, not the general philosophical claim about the perspectival nature of knowledge claims. But appeal to such relations has also been the preferred strategy of scientific realist approaches to the problem. With respect to the problem of incompatible models, then, it is not clear that perspectivism has a clear advantage—even though the issue was among the motivating problems for proposing this view. I suggest, however, that the required inter-model relations (typically limit relations) embody a narrower notion of perspective, a notion that is explicitly part of the models themselves and that is essential in maintaining a realist view.     

II. Frege as Idealist and then Realist

Michael Dummett argued that Frege was a realist while Hans Sluga countered that he was an objective idealist in the rationalist tradition of Kant and Lotze. Sluga ties Frege's idealism to the context principle which he argues Frege never gave up. It is argued that Sluga has correctly interpreted the pre‐1891 Frege while Dummett is correct concerning the later period. It is also claimed that the context principle was dropped prior to 1891 to be replaced by the doctrine of unsaturated entities.     

Four Kinds of Perspectival Truth

In this paper, I assess recent claims in philosophy of science about scientific perspectivism being compatible with realism. I clarify the rationale for scientific perspectivism and the problems and challenges that perspectivism faces in delivering a form of realism. In particular, I concentrate my attention on truth, and on ways in which truth can be understood in perspectival terms. I offer a cost‐benefit analysis of each of them and defend a version that in my view is most promising in living up to realist expectations.     

Scientific Law: A Perspectival Account

An acceptable empiricist account of laws of nature would havesignificant implications for a number of philosophical projects. For example, such an account may vitiate argumentsthat the fundamental constants of nature are divinelydesigned so that laws produce a life permittinguniverse. On an empiricist account, laws do not produce the universe but are designed by us to systematize theevents of a universe which does in fact contain life; so any ``fine tuning' of natural law has a naturalistic explanation.But there are problems for the empiricist project. This paper develops a ``perspectival' version of the Humean bestsystem approach and argues that this version solves the standard problems faced by the empiricist project.Furthermore, the paper argues, this version is best able to answer the proponents of divine design while leaving scientificlaw a suitably objective matter.[I]t is possible tocondense the enormous mass of results to a large extent – that is to find laws which summarize ...Richard Feynman (1963)It has become fashionable in some circles to argue thatscience is ultimately a sham, that we scientists read order into nature, not out of nature, and that the laws of physicsare our laws, not nature's. I believe this is arrant nonsense. You would be hard-pressed to convince a physicist thatNewton's inverse square law of gravitation is a purely cultural concoction. The laws of physics, I submit, reallyexist in the world out there, and the job of the scientist is to uncover them, not invent them. True, at any giventime, the laws you find in the textbooks are tentative and approximate, but they mirror, albeit imperfectly, a reallyexisting order in the physical world. Of course, many scientists do not recognize that in accepting the reality of anorder in nature-the existence of laws `out there' – they are adopting a theological world view. P. C. W. Davies (1995)     

The Perspectival Nature of Probability and Inference

It is argued that two observers with the same information may rightlydisagree about the probability of an event that they are both observing. This is a correct way of describing the view of a lottery outcome from the perspective of a winner and from the perspective of an observer not connected with the winner - the outcome is improbable for the winner and not improbable for the unconnected observer. This claim is both argued for and extended by developing a case in which a probabilistic inference is supported for one observer and not for another, though they relevantly differ only in perspective, not in any information that they have. It is pointed out, finally, that all probabilities are in this way dependent on perspective.     

Historical Knowledge as Perspectival and Rational: Remarks on the Annales School's Idea of History

There is an obvious parallel between foundationalism, which ignores history in working out the conditions of knowledge, and radical relativism, which contends that by virtue of its own historical character there is no way to choose among different interpretations, all of which are "equally good." Might it not be, rather, that the recent historicist attack on the very idea of rationality is as damaging as foundationalist objections against the plurality of conceptual schemes or frameworks? Can philosophy maintain the traditional distinction between the form and content of knowledge, between rationality and historicity _ between doxa and episteme ?     

Perspectival appearing and Gilbson's theory of visual perception

Summary Although Gibson (1979) did not explicitly discuss the perspectival appearing of the ecological environment, his important ecological approach to visual perception can accommodate both (a) the stream of visual-perceptual experience that flows at the heart of the visual system's total activity of ordinary visual perceiving (ordinary seeing), and (b) the dimension of the visual experiential stream that is the ecological environment's perspectival appearing to the visual perceiver. In the present article, perspectival appearing is located at the level of brain centers of the visual system, where processes are determined by the spatiotemporally structured visual stimulus flux. And the stream of visual experience is interpreted as itself possessing a kind of perspective structure (as does the visual stimulus flux), including variant and invariant features that the visual system isolates and extracts from experience, producing the perceiver's cognitive visual awareness-of (Gibson, 1979) the environment and self in the environment.     

A Realist Sexual Ethics

A very liberal sexual ethics now holds sway in Western culture, such that mutual consent alone is widely seen as morally legitimizing almost any sexual activity between adults. It is further commonly assumed by both philosophers and nonphilosophers that arguing for some alternative to liberal sexual ethics requires appeal to ethical commands specific to some religious tradition or other. The purpose of this paper is to challenge that assumption by suggesting some purely naturalistic and independently‐plausible premises that can be used to argue for a much more conservative system of sexual ethics than is widely accepted today.