Grünbaum has argued that the Lorentz-Fitzgerald contraction hypothesis is not ad hoc since the Kennedy-Thorndike experiment can be used to provide a test that is significantly different from that provided by the Michelson-Morley experiment. In the first part of the paper, I show that the differences claimed by Grünbaum to hold between these two experiments are not sufficient for establishing independent testability. A dilemma is developed: either the Kennedy-Thorndike experiment, because of experimental realities, cannot test the uncontracted Fresnel aether theory, or if experimental difficulties are ignored, the Kennedy-Thorndike experiment degenerates into a version of the Michelson-Morley experiment. The second part of the paper is a feasibility study of the prospects for defining experimental types according to aims of measurement and determination. This approach is applied to the contraction hypothesis, where it is suggested that the usual analysis of independent testability be modified.

The relationship between vague statements and fuzzy sets is examined. It is shown that the probability of vague statements may be defined in a manner analogous to that discussed in Reichenbach's logic of weight.

Although our theories are not precisely true, scientific realists contend that we should admit their objects into our ontology. One justification—offered by Sellars and Putnam—is that current theories belong to series that converge to ideally adequate theories. I consider the way the commitment to convergence reflects on the interpretation of lawlike claims. I argue that the distinction between lawlike and accidental generalizations depends on our cognitive interests and reflects our commitment to the direction of scientific progress. If the sciences disagree about the lawlikeness of some generalization(s), as an argument of Davidson's suggests, it follows from the interest relatively of lawlikeness that the laws of a science do not determine the essences of their objects. I conclude that this form of scientific realism provides no metaphysical support for essentialism.

In “Realism and Reason” Hilary Putnam has offered an apparently strong argument that the position of metaphysical realism provides an incoherent model of the relation of a correct scientific theory to the world. However, although Putnam's attack upon the notion of the “intended” interpretation of a scientific theory is sound, it is shown here that realism may be formulated in such a way that the realist need make no appeal to any “intended” interpretation of such a theory. Consequently, it can be shown that realism is immune to Putnam's criticism and that attempts at reformulating this criticism are not likely to meet with success.

Basic research or fundamental research is distinct from both pure and applied research, in that it is pure research with expected useful results. The existence of basic or fundamental research is problematic, at least for both inductivists and instrumentalists, but also for Popper. Assuming scientific research to be the search for explanatory conjectures and for refutations, and assuming technology to be the search of conjectures and some corroborations, we can easily place basic or fundamental research between science and technology as a part of their overlap. As a bonus, the present view of basic or fundamental research as an overlap explains the specific hardship basic research workers encounter.

This paper argues for the importance of approaching medicine, as a theoretical science, through values. The normative concepts of benefit and harm are held to provide a framework for the analysis of medicine which reflects the obligations of the doctor-patient relationship, suffices to define the key concept of medical relevance, yields a general necessary condition for the basic concepts of medicine, explains the role of such nonnormative conceptions as discomfort, dysfunction, and incapacity, and avoids the mistakes of other normative approaches which hold that unhealthy conditions are disvaluable or should be treated. Neutralist analyses are criticized, especially those approaching health through proper functioning.

The unique role of the second derivative of position with respect to time in classical mechanics is investigated. It is indicated that mechanics might have been developed around other order derivatives. Examples based on and are presented. Kirchhoff s argument for using ẍ is given and generalized.