In a recent article, Thomas Nagel argues against the court’s decision to strike down the Dover school district’s requirement that biology teachers in Dover public schools inform their students about Intelligent Design. Nagel contends that this ruling relies on questionable demarcation between science and nonscience and consequently misapplies the Establishment Clause of the constitution. Instead, he argues in favor of making room for an open discussion of these issues rather than an outright prohibition against Intelligent Design. We contend that Nagel’s (...) arguments do not succeed. First, we argue that Nagel’s case trades on an ambiguity regarding the content of non-theological views and fails to engage adequately some of the problems of ID. Then we raise concerns about Nagel’s conclusion; specifically, we will point to three incongruities between Nagel’s argument and his conclusion, and then we will raise a more general worry about the likely impact of Nagel’s view. (shrink)

In recent controversies about Intelligent Design Creationism (IDC), the principle of methodological naturalism (MN) has played an important role. In this paper, an often neglected distinction is made between two different conceptions of MN, each with its respective rationale and with a different view on the proper role of MN in science. According to one popular conception, MN is a self-imposed or intrinsic limitation of science, which means that science is simply not equipped to deal with claims of the supernatural (...) (Intrinsic MN or IMN). Alternatively, we will defend MN as a provisory and empirically grounded attitude of scientists, which is justified in virtue of the consistent success of naturalistic explanations and the lack of success of supernatural explanations in the history of science (Provisory MN or PMN). Science does have a bearing on supernatural hypotheses, and its verdict is uniformly negative. We will discuss five arguments that have been proposed in support of IMN: the argument from the definition of science, the argument from lawful regularity, the science stopper argument, the argument from procedural necessity, and the testability argument. We conclude that IMN, because of its philosophical flaws, proves to be an ill-advised strategy to counter the claims of IDC. Evolutionary scientists are on firmer ground if they discard supernatural explanations on purely evidential grounds, instead of ruling them out by philosophical fiat. (shrink)

Laudan’s argument against the possibility of a demarcation criterion for scientific theories rests on establishing that any criterion must be a necessary and sufficient condition. But Laudan’s argument at most establishes that any criterion must provide a necessary condition and a possibly different sufficient condition. His own claims suggest that such a criterion is possible.

Kuhn maintains that what marks the transition to a science is the ability to carry out ‘normal’ science—a practice he characterizes as abandoning the kind of testing that Popper lauds as the hallmark of science. Examining Kuhn's own contrast with Popper, I propose to recast Kuhnian normal science. Thus recast, it is seen to consist of severe and reliable tests of low-level experimental hypotheses (normal tests) and is, indeed, the place to look to demarcate science. While thereby vindicating Kuhn on (...) demarcation, my recasting of normal science is seen to tell against Kuhn's view of revolutionary science. (shrink)

The main claim of this paper is that the boundary between scientific and non scientific knowledge does exist -- which means several things. First, it's not the case that anything goes: some irrationalists have been mistaken into acceptance of that wrong conclusion because they have remarked that, however the boundary might be drawn, some important scientific developments would fall afoul of the standards entitling a research practice to count as scientific. Second, the boundary is not an imaginary one, that is (...) to say besides what is scientific and what is unscientific there also is what lies at the boundary, certain research practices which are neither wholly scientific nor fully unscientific. Third, studying what is science is itself a kind of research belonging to the boundary, since the methods available in that research are not as strictly rigorous as those used in science proper; in fact, all of philosophy is included in the boundary in question. Fourth, the boundary (and in fact science itself) displays a characteristic structure pertaining to what are by now usually called «non wellfounded sets» -- sets, that is, which are somehow or other involved in themselves, whether as members, or as members of members or so on; the significance of the last thesis is that the best way of approaching philosophy of science is not standard set theory, but theories allowing non wellfounded sets are preferable. Fifth, and last, admission of the boundary's existence compels us to go beyond standard classical logic and to look for a more suitable logic, as for instance some kind of fuzzy paraconsistent logic. (shrink)

In the 2005 Kitzmiller v Dover Area School Board case, a federal district court ruled that Intelligent Design creationism was not science, but a disguised religious view and that teaching it in public schools is unconstitutional. But creationists contend that it is illegitimate to distinguish science and religion, citing philosophers Quinn and especially Laudan, who had criticized a similar ruling in the 1981 McLean v. Arkansas creation-science case on the grounds that no necessary and sufficient demarcation criterion was possible and (...) that demarcation was a dead pseudo-problem. This article discusses problems with those conclusions and their application to the quite different reasoning between these two cases. Laudan focused too narrowly on the problem of demarcation as Popper defined it. Distinguishing science from religion was and remains an important conceptual issue with significant practical import, and philosophers who say there is no difference have lost touch with reality in a profound and perverse way. The Kitzmiller case did not rely on a strict demarcation criterion, but appealed only to a “ballpark” demarcation that identifies methodological naturalism (MN) as a “ground rule” of science. MN is shown to be a distinguishing feature of science both in explicit statements from scientific organizations and in actual practice. There is good reason to think that MN is shared as a tacit assumption among philosophers who emphasize other demarcation criteria and even by Laudan himself. (shrink)

Introduction : science versus pseudoscience and the "demarcation problem" -- Hard science, soft science -- Almost science -- Pseudoscience -- Blame the media? -- Debates on science : the rise of think tanks and the decline of public intellectuals -- Science and politics : the case of global warming -- Science in the courtroom : the case against intelligent design -- From superstition to natural philosophy -- From natural philosophy to modern science -- The science wars I : do we (...) trust science too much? -- The science wars II : do we trust science too little? -- Who's your expert? -- Conclusion : so, what is science after all? (shrink)

Quine taught us that the collapse of positivism entails that empirical theories are, in principle, undetermined-- not just by the available evidence-- but by all possible evidence. Without disputing that conclusion, contemporary philosophers-- exampled here by Simon Blackburn and Jerry Fodor-- have wanted to treat this as a merely abstract possibility that need not undermine our confidence in actual scientific theory and practice. I argue that there is no basis for this complacency.