Online research in philosophy

Generalisations of theory change involving arbitrary sets of wffs instead of belief sets have become known as base change. In one view, a base should be thought of as providing more structure to its generated belief set, and can be used to determine the theory change operation associated with a base change operation. In this paper we extend a proposal along these lines by Meyer et al. We take an infobase as a finite sequence of wffs, with each element in the sequence being seen as an independently obtained bit of information, and define appropriate infobase change operations. The associated theory change operations satisfy the AGM postulates for theory change. Since an infobase change operation produces a new infobase, it allows for iterated infobase change. We measure iterated infobase change against the postulates proposed by Darwiche et al. and Lehmann.

Kutschera's criticism of an objectivist theory of mind is shown to rest on a premise which an objectivist need not accept, namely, that there is a deep metaphysical distinction between the physical and the psychological domain. This premise can be rejected on naturalistic grounds. Referring to the work of Rosenthal, Dennett and Davidson, it is argued that less metaphysically loaded explanations can be given of what is subjective about the mind.

An examination of earlier views yields an account of theoretic change on which changes in theory which do involve changes in meanings of terms are classified as a special (and by no means exhaustive) case of theoretic change which, latter, is construed as a more general phenomenon. Only the general problem is given detailed consideration here. The account given considers the problem of how replacement of intensional theories by extensional ones may be treated within the general framework provided. Among its results is the conclusion that rational changes in a scientific theory may be cogently construed as determined by warranted decisions that a new theory is more adequate (than the old one it replaces) with regard to purposes for which a theory is sought.

How should our beliefs change over time? Much has been written about how our beliefs should change in the light of new evidence. But that is not the question I’m asking. Sometimes our beliefs change without new evidence. I previously believed it was Sunday. I now believe it’s Monday. In this paper I discuss the implications of such beliefs for philosophy of language. I will argue that we need to allow for ‘dynamic’ beliefs, that we need new norms of belief change to model how they function, and that this gives Perry’s (1977) two tier account the advantage over Lewis’s (1979) theory.

This paper discusses the theory of socialism endorsed by Li Dazhao, China's first Marxist, as an effort to integrate western ideas into the traditional Chinese thinking during the chaotic years of the 1920s. There are two aspects of Li's theory of socialism which, while related, are distinct: (1) a theory about the nature of socialist society, and (2) a theory about how a socialist society can be achieved in China. Li's development of (1) is influenced by his acceptance of the classical Confucian notion of the Great Harmony while his account of (2) draws upon both his acceptance of the Daoist account of historical change and on classic Confucianism. Understanding his theory of socialism thus requires locating it within these two doctrines of classical Chinese philosophy.

Wesley Salmon and John Earman have presented influential Bayesian reconstructions of Thomas Kuhn’s account of theory-change. In this paper I argue that all attempts to give a Bayesian reading of Kuhn’s philosophy of science are fundamentally misguided due to the fact that Bayesian confirmation theory is in fact inconsistent with Kuhn’s account. The reasons for this inconsistency are traced to the role the concept of incommensurability plays with reference to the ‘observational vocabulary’ within Kuhn’s picture of scientific theories. The upshot of the discussion is that it is impossible to integrate both Kuhn’s claims and Bayesianism within a coherent account of theory-change.

It is often said that our moral experience, broadly construed to include our ways of thinking and talking about morality, has a certain objective-seeming character to it, and that this supports a presumption in favor of objectivist theories (according to which morality is a realm of facts or truths) and against anti-objectivist theories like Mackie’s error theory (according to which it is not). In this paper, I argue that our experience of morality does not support objectivist moral theories in this way. I begin by arguing that our moral experience does not have the uniformly objective-seeming character it is typically claimed to have. I go on to argue that even if moral experience were to presuppose or display morality as a realm of fact, we would still need a reason for taking that to support theories according to which it is such a realm. I consider what I take to be the four most promising ways of attempting to supply such a reason: (A) inference to the best explanation, (B) epistemic conservatism, (C) the Principle of Credulity, and (D) the method of wide reflective equilibrium. In each case, I argue, the strategy in question does not support a presumption in favor of objectivist moral theories.

This paper is concerned with the possibility of an objectivism for aesthetic judgements capable of incorporating certain ‘subjectivist’ elements of aesthetic experience. The discussion focuses primarily on a desired cognitivism for aesthetic judgements, rather than on any putative realism of aesthetic properties. Two cognitivist theories of aesthetic judgements are discussed, one subjectivist, the other objectivist. It is argued that whilst the subjectivist theory relies too heavily upon analogies with secondary qualities, the objectivist account, which allows for some such analogies at the epistemological level, is too quick to ground aesthetic judgements in perceptual experiences alone. Further, it is held that aesthetic justification can, contra the objectivist theory under scrutiny, be based on an appeal to generally available justifying reasons without overthrowing the non-inferential character of aesthetic judgements. This possibility relies on a clearly established delineation between (i) aesthetic perception and aesthetic judgement, (ii) justifying reasons and explaining reasons, and (iii) judgement-making and judgement-justification.

The present paper discusses Kitcher’s framework for studying conceptual change and progress. Kitcher’s core notion of reference potential is hard to apply to concrete cases. In addition, an account of conceptual change as change in reference potential misses some important aspects of conceptual change and conceptual progress. I propose an alternative framework that focuses on the inferences and explanations supported by scientific concepts. The application of my approach to the history of the gene concept offers a better account of the conceptual progress that occurred in the transition from the Mendelian to the molecular gene than Kitcher’s theory.

In this paper I claim that Quinean naturalist accounts of science, that deny that there are any a priori statements in scientific frameworks, cannot account for the foundational role of certain classes of statements in scientific practice. In this I follow Michael Friedman who claims that certain a priori statements must be presupposed in order to formulate empirical hypotheses. I also show that Friedman's account, in spite of his claims to the contrary, is compatible with a type of non-Quinean naturalism that I sketch. Finally I also show that Friedman's account needs amending because it cannot provide a rational account of theory change. I accomplish this by arguing for a structural realist view of theory change. I show how this view fits well with an account like Friedman's and helps it deal with the problem of theory change and in retaining its superiority over Quinean naturalism.