Reliabilism in philosophy

The following three propositions appear to be individually defensible but jointly inconsistent: (1) reliability is a necessary condition on epistemic justification; (2) on contested matters in philosophy, my beliefs are not reliably formed; (3) some of these beliefs are epistemically justified. I explore the nature and scope of the problem, examine and reject some candidate solutions, compare the issue with ones arising in discussions about disagreement, and offer a brief assessment of our predicament.

A Pragmatic Case against Pragmatic Scientific Realism

Pragmatic Scientific Realism (PSR) urges us to take up the realist aim or the goal of truth although we have good reason to think that the goal can neither be attained nor approximated. While Newton-Smith thinks that pursuing what we know we cannot achieve is clearly irrational, Rescher disagrees and contends that pursuing an unreachable goal can be rational on pragmatic grounds—if in pursuing the unreachable goal one can get indirect benefits. I have blocked this attempt at providing a pragmatic justification for the realist aim of PSR on precisely the same pragmatic grounds—since there is a competing alternative to PSR, and the alternative can provide whatever indirect benefits PSR can offer while being less risky than it is, prudential reasoning favours the alternative to PSR. This undermines the pragmatic case for the realist aim of science since the instrumentalist alternative does not aim at the truth.     

Belief-Ful Realism and Scientific Realism

Despite tensions between Tillich's category of belief-ful realism and a view of science that embraces metaphysical and epistemological realism, a constructive relationship can be developed between the two. Both are based on common understandings about reality. Belief-ful or theonomous realism thus affirms scientific realism. On the other hand, scientific realism is open to the ecstatic, self-transcending elements of belief-ful realism. Finally, Tillich's formulation of the relationship between culture and religion can be reformulated specifically to include scientific and technological culture.     

Recent Debates Over Structural Realism

Summary  In recent years Structural Realism has been revived as a compromise candidate to resolve the long-standing question of scientific realism. Recent debate over structural realism originates with Worrall’s (1989) paper “Structural Realism: The best of Both Worlds”. However, critics such as Psillos contend that structural realism incorporates an untenable distinction between structure and nature, and is therefore unworkable. In this paper I consider three versions of structural realism that purport to avoid such criticism. The first is Chakravartty’s “semirealism” which proceeds by trying to show that structural realism and entity realism entail one another. I demonstrate that this position will not work, but follow Chakravartty’s contention that structural realism need not imply that scientific knowledge can only be of mathematical structure. I advance from this conclusion to sketch a version of structural realism that is consistent with recent deflationary approaches to the scientific realism question. Finally, I consider a third approach to structural realism Ladyman’s “metaphysical structural realism” which tries to avoid the difficulties of earlier versions by taking structure to be ontologically primary. I show that the deflationary approach to structural realism undermines the rationale behind Ladyman’s approach.     

Reliabilism,scepticism, and evidentia in Ockham

The aim of this paper is to challenge the reliabilist interpretation of William Ockham (ca. 1287–1347)'s epistemology. The discussion proceeds as follows. First, I analyse the reliabilist interpretation into two theses: (1) a negative thesis I call the Anti-Internalism Thesis, according to which, for Ockham, epistemic justification does not depend on any internal factors that are accessible by reflection; (2) a positive thesis I call the Reliability Thesis, according to which epistemic justification in Ockham depends on the reliability of a causal process through which a given judgment is produced. Secondly, I argue that the Anti-Internalism Thesis fails since Ockham's notion of evidentness (evidentia), which is at the heart of his theory of justification, strongly suggests that he posits an indispensable, internalist element of justification. Lastly, I argue that the Reliability Thesis also fails since not only can there be a reliable but inevident judgment in Ockham's framework, his emphasis on causality is best read not as talk of reliability, but as his emphasis on the relation between reason (or evidence) and what is based on reason.     

Scientific Realism and the Meanings of Theoretical Terms

In contemporary philosophy of science, there are many interesting arguments for and against scientific realism with regard to the meaningfulness and truthfulness of theoretical statements. Some anti-realists hold that since many important concepts in scientific theories have no specific referents, the relevant theoretical statements are therefore either false or meaningless. In this essay, I join the debates concerning the plausibility of scientific realism by focusing on two intertwined issues： first, that of how we can we explicate the meaningfulness of theoretical statements, especially statements pertaining to unobservable objects, and second, that of the meaningfulness of theoretical statements for our acceptance of scientific realism.     

科学实在主义对现代心理学的影响

科学实在主义认为科学理论应该超越数据去假设不可观察的实体的存在,它为现代心理学提供了本体论支持。该文以科学实在主义为基本框架,从发展历程与发展趋势等方面重新思考了它对现代心理学的影响,为心理学研究带来了新的方法论意义。     

Structural Realism, Scientific Change, and Partial Structures

Scientific change has two important dimensions: conceptual change and structural change. In this paper, I argue that the existence of conceptual change brings serious difficulties for scientific realism, and the existence of structural change makes structural realism look quite implausible. I then sketch an alternative account of scientific change, in terms of partial structures, that accommodates both conceptual and structural changes. The proposal, however, is not realist, and supports a structuralist version of van Fraassen’s constructive empiricism (structural empiricism).     

Two Notions of Scientific Justification

Scientific claims can be assessed epistemically in either of two ways: according to scientific standards, or by means of philosophical arguments such as the no-miracle argument in favor of scientific realism. This paper investigates the basis of this duality of epistemic assessments. It is claimed that the duality rests on two different notions of epistemic justification that are well-known from the debate on internalism and externalism in general epistemology: a deontological and an alethic notion. By discussing the conditions for the scientific acceptability of empirical results, it is argued that intrascientific justification employs the deontological notion. Philosophical disputes such as those on scientific realism can by contrast be shown to rest on the alethic notion. The implications of these findings both for the nature of the respective epistemic projects and for their interrelation are explored.     

Embodied Critical Realism

Christian Smith's What Is a Person? provides an account of the person from the perceptive of critical realism. As a fellow critical realist, I support that philosophical position and in this response I seek to support it by connecting it to the embodied realism developed by George Lakoff and Mark Johnson. In order to bring the two forms of realism together, I critique both the relativism of embodied realism and the idea, found in Smith, that the person's awareness of the world is mediated by her experience. The goal of this paper, then, is an embodied critical realism, a more coherent realist position that combines the best parts of each.     

In Defence of Direct Realism

In her careful consideration of my book, The Problem of Perception (henceforth, PP), Susanna Siegel highlights what she takes to be a number of shortcomings in the work. First, she suggests that a sense-datum theorist has two options–what she calls the "complex sense-data option" and the "two-factor option"–that survive the argument of my book unscathed. I consider these two options in the first two sections of this reply. Secondly, she criticizes my suggestion that there are three and only three basic and independent sources of perceptual consciousness: an issue I take up in my third section. Thirdly, she expresses reservations about my response to the argument from hallucination. In particular, she argues that the phenomenological considerations on which I put so much weight cannot settle the fundamental issue here. I address this criticism in the fourth section of this reply. Finally, she spends a certain amount of time discussing the notion of a "veridicality-rele-vant property", a topic to which I devote the concluding section of this reply.     

Scientific Realism Within Perspectivism and Perspectivism Within Scientific Realism

Perspectivism is often understood as a conception according to which subjective conditions inevitably affect our knowledge and, therefore, we are never confronted with reality and facts but only with interpretations. Hence, subjectivism and anti-realism are usually associated with perspectivism. The thesis of this paper is that, especially in the case of the sciences, perspectivism can be better understood as an appreciation of the cognitive attitude that consists in considering reality only from a certain ‘point of view’, in a way that can avoid subjectivism. Whereas the way of conceiving a notion is strictly subjective, the way of using it is open to intersubjective agreement, based on the practice of operations whose nature is neither mental nor linguistic. Therefore, intersubjectivity (that is a ‘weak’ sense of objectivity) is possible within perspectivism. Perspectivism can also help understand the notion of ‘scientific objects’ in a referential sense: they are those ‘things’ that become ‘objects’ of a certain science by being investigated from the ‘point of view’ of that science. They are ‘clipped out’ of things (and constitute the ‘domain of objects’ or the ‘regional ontology’ of that particular science) by means of standardized operations which turn out to be the same as those granting intersubjectivity. Therefore this ‘strong’ sense of objectivity, which is clearly realist, coincides with the ‘weak’ one. The notion of truth appears fully legitimate in the case of the sciences, being clearly defined for the regional ontology of each one of them and, since this truth can be extended in an analogical sense to the theories elaborated in each science, it follows that are real also the unobservable entities postulated by those theories.     

Realism,Positivism and Reference

Summary  Depending on the realist or instrumentalist twist that is given to positivism, interesting arguments can be made for both causal and classical theories of reference with regard to the use of scientific terms in the language of theory. But my claim is that the rigid foundationalism that supports the theoretical terms via the correspondence rules of the Received View undercuts the notion that it is possible to argue coherently for a causal theory of reference as allied to a positivistic view.     

An Argument For Metaphysical Realism

This paper presents an argument for metaphysical realism, understood as the claim that the world has structure that would exist even if our cognitive activities never did. The argument is based on the existence of a structured world at a time when it was still possible that we would never evolve. But the interpretation of its premises introduces subtleties: whether, for example, these premises are to be understood as assertions about the world or about our evidence, internally or externally, via assertibility conditions or truth conditions – and what sorts of beings are included in the `we' upon whose cognitions the antirealist supposes the structure of the world to depend. I argue that antirealism can provide no defensible, fully articulated interpretation of the premises that either shows them not to be true or defeats the reasoning. This revised version was published online in July 2006 with corrections to the Cover Date.