Online research in philosophy

This essay contains a partial exploration of some key concepts associated with the epistemology of realist philosophies of science. It shows that neither reference nor approximate truth will do the explanatory jobs that realists expect of them. Equally, several widely-held realist theses about the nature of inter-theoretic relations and scientific progress are scrutinized and found wanting. Finally, it is argued that the history of science, far from confirming scientific realism, decisively confutes several extant versions of avowedly 'naturalistic' forms of scientific realism.

Abstract : In this paper, it is argued that Leibniz’s view that necessity is grounded in the availability of a demonstration is incorrect and furthermore, can be shown to be so by using Leibniz’s own examples of infinite analyses. First, I show that modern mathematical logic makes clear that Leibniz’s "infinite analysis" view of contingency is incorrect. It is then argued that Leibniz's own examples of incommensurable lines and convergent series undermine, rather than bolster his view by providing examples of necessary mathematical truths that are not demonstrable. Finally, it is argued that a more modern view on convergent series would, in certain respects, help support some claims he makes about the necessity of mathematical truths, but would still not yield a viable theory of necessity due to remaining problems with other logical, mathematical, and modal claims.

In this paper, I explore the nature of photographs by comparing them to hand-made paintings, as well as by comparing traditional film photography with digital photography, and I concentrate on the question of realism. Several different notions can be distinguished here. Are photographs such that they depict the world in a 'realist' or a 'factive' way ? Do they show us the world as it is with accuracy and reliability other types of pictures don't posses ? Do they allow us, as some have suggested, to literally see the world through them ? Below, I will distinguish three kinds of realism about photographs, reject two, and partly endorse one. Indeed, the label "realism", when concerning photographs, can stand for a variety of very different claims. The first (and quite obvious) distinction to start with concerns what the realist thesis is about : the claim that somehow photographs are more accurate or more reliable or that they somehow depict the world better than hand-made pictures can be a claim about the photographic image itself or alternatively a claim about the way in which photographs are produced. In the former case, realism is a thesis about how photographs look and what sort of information they contain, while in the latter case realism is a claim about the process of production of photographs. It is the latter claim that is the most discussed in the philosophical literature about photography. I will concentrate on this type of realism, of which I shall examine two varieties.

This paper develops a modification of the notion of incommensurable worlds upon which Dreyfus and Spinosa base their robust realism. In particular, I argue that we cannot make sense of a conception of incommensurability according to which incommensurable worlds entail cognitively incompatible claims. Instead, as Dreyfus and Spinosa sometimes suggest, incommensurable worlds should be understood as being practically incompatible, meaning that the inhabitants of one world cannot, given their practices for dealing with some things, engage in practices central to the other world. Practical incompatibility grounds a defensible account of incommensurability while securing a necessary step in Dreyfus and Spinosa's argument for robust realism. At the same time, it shows how their idea of incommensurability is immune to the sorts of objections Donald Davidson makes to the idea of a plurality of conceptual schemes, without at the same time refuting Davidson's argument. Finally, an appreciation of the failings of cognitive accounts of incommensurability demonstrates that Dreyfus and Spinosa are not entitled to deny that all true descriptions of the universe are compatible.

In his paper "A Confutation of Convergent Realism", Larry Laudan offered one of the most powerful criticisms of scientific realism. I defend here that although Laudan's criticism is right, this does not refute the realist position. The thesis that Laudan confutes is a much stronger thesis than realist needs to maintain. As I will exemplify with Salmon's statistical-relevance model, a less strict notion of explanation would allow us to claim that (approximate) truth is the best explanation for such success, even if it is accepted that there can be cases of unsuccessful (approximately) true theories and cases of successful false theories.

Larry Laudan has challenged the realist to come up with a program that submits realism to "those stringent empirical demands which the realist himself minimally insists on when appraising scientific theories." This paper shows how the realist can go about taking up Laudan on this challenge; and, in such a way that the realist hypothesis actually ends up being confirmed, by any empirical standards. In other words, it is shown that we can test for convergent realism, just as readily as Laudan can test for a connection between theories that are controlled by the cannons of science and their subsequent reliability.

I examine the role that approximate truth plays in arguments for convergent realism and diagnose some difficulties that face attempts to defend realism by employing this slippery concept. Approximate truth plays two important roles in convergent realism: it functions as a truth surrogate and it helps explain the success of science. I argue that approximate truth cannot perform both of these roles. If it adequately fulfills its role as a truth surrogate, then it cannot explain the success of science. If it adequately explains the success of science, then it cannot function as a truth surrogate.