Accompanying the decline of empiricism in the theory of knowledge has been an increased interest in the social determinants of knowledge and an increased recognition of the fundamental place in the constitution of knowledge occupied by accepted cognitive practices. The principal aim of this paper is to show how a view of knowledge that fully recognizes the role of these practices can adequately treat a topic that is widely considered to be an insuperable obstacle to such a view. The topic is that of scientific realism, of the independence with respect to cognitive practices of certain objects of knowledge.

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.

The positive argument for realism is that it is the only philosophy that doesn't make the success of science a miracle.

-H. Putnam (1975)

Recent discussions of experimental tests of the Sum Rule have been carried out in the context of the special circumstances attending the Cross-Ramsey experiment. A more general analysis of possible tests is presented. A technical mistake of Fine and Glymour concerned with a misunderstanding of the physics of the Cross-Ramsey experiment is explained and a detailed analysis of a thought experiment based on the Einstein-Podolsky-Rosen wave function is given. It is concluded, in agreement with Fine, that scattering experiments do not test the Sum Rule as a principle which supplements standard quantum mechanics.

This paper considers the problem of causal explanation in classical and statistical thermodynamics. It is argued that the irreversibility of macroscopic processes is explained in both formulations of thermodynamics in a teleological way that appeals to entropic or probabilistic consequences rather than to efficient-causal, antecedental conditions. This explanatory structure of thermodynamics is not taken to imply a teleological orientation to macroscopic processes themselves, but to reflect simply the epistemological limitations of this science, wherein consequences of heat-work asymmetries are either macroscopically measurable (entropy) or calculable (probabilities), while efficient-causal relationships are obscure or indeterminable.

The question “what is (are) the unit(s) of selection” can be interpreted in three different ways. These interpretations are discussed and it is shown that they prompt different answers; such units are shown to be individuals in the context of the given interpretation. One of these interpretations is argued, by examples, not always to have an unambiguously correct answer. An alternative approach to this question is sketched.

It is argued that the debate over the positivist theory of historical explanation has made only a limited contribution to our understanding of how historians should defend the explanations they propose importantly because both positivists and their critics tacitly accepted two assumptions. The first assumption is that if the positivist analysis of historical explanation is correct, then historians ought to attempt to defend covering laws for each of the explanations they propose. The second is that unless a historian can justify an explanation that he proposes, then his preference for that explanation is not rationally defensible. It is argued that the first assumption is false and that if in order to justify an explanation, one must justify a covering law for it, then the second assumption is also false. A program for investigating how historians should defend their explanations is suggested.

It is shown that the uncertainty principle has nothing directly to do with the non-localisability of position and momentum for an individual system on the quantum logical view. The product Δx·Δp for localisation of the ranges of position and momentum of an individual system → ∞, while the quantities ΔX and ΔP in the uncertainty principle ΔX·ΔP ≥ ħ/2, must be given a statistical interpretation on the quantum logical view.