Evaluates trade-offs and uncertainties inherent in achieving sustainable energy, analyzes the major energy technologies, and provides a framework for assessing policy options.

In 1885, during initial discussions of J. C. Maxwell's celebrated thermodynamic demon, Whiting(1) observed that the demon-like velocity selection of molecules can occur in a gravitationally bound gas. Recently, a gravitational Maxwell demon has been proposed which makes use of this observation [D. P. Sheehan, J. Glick, and J. D. Means, Found. Phys. 30, 1227 (2000)]. Here we report on numerical simulations that detail its microscopic phase space structure. Results verify the previously hypothesized mechanism of its paradoxical behavior. This system (...) appears to be the only example of a fully classical mechanical Maxwell demon that has not been resolved in favor of the second law of thermodynamics. (shrink)

Two of the most fundamental questions about language are these: what are languages?; and, what is it to know a given language? Many philosophers who have reflected on these questions have presented answers that attribute a central role to conventions. In one of its boldest forms such a view runs as follows. Languages are either social entities constituted by networks of social conventions or abstract objects where when a particular community speaks a given language they do so in virtue of (...) the conventions operative within that community. Consequently, for an individual to know a given language is for them to be party to the relevant conventions. Call this view conventionalism. In this article my aim is to evaluate conventionalism. I will argue that although there are linguistic conventions and that they do play an important role in language development and communication conventionalism should be rejected in favour of a more psychologistically orientated position. (shrink)

Cases of sexual harassment have become increasingly common in the courts, but there is at present no coherent definition of just what sexual harassment is supposed to consist. The Equal Employment Opportunity Commission guidelines ultimately focus on issues of subjective victimization, a standard which is overly broad and prescriptively empty. In order to salvage the concept of sexual harassment, it is argued here that the element of unwelcomeness must be removed from it. Instead of considering welcomeness, it is argued that (...) sexual harassment can be given proscriptive clarity if it is delineated as gender harassment, coercive sexual harassment, and presumptive sexual harassment. (shrink)

In this paper I address the issue of the subject matter of linguistics. According to the prominent Chomskyan view, linguistics is the study of the language faculty, a component of the mind-brain, and is therefore a branch of cognitive psychology. In his recent book Ignorance of Language Michael Devitt attacks this psychologistic conception of linguistics. I argue that the prominent Chomskyan objections to Devitt's position are not decisive as they stand. However, Devitt's position should ultimately be rejected as there is (...) nothing outside of the mind of a typical speaker that could serve to fix determinate syntactic rules of her language or constitute the supervenience base of her connection to any such rules. (shrink)

Psychological essentialism is a prominent view within contemporary developmental psychology and cognitive science according to which children have an innate commitment to essentialism. If this view is correct then a commitment to essentialism is an important aspect of human nature rather than a culturally specific commitment peculiar to those who have received a specific philosophical or scientific education. In this article my concern is to explore the philosophical significance of psychological essentialism with respect to the relationship between the content of (...) our concepts and thoughts and the nature of the extra-cranial world. I will argue that, despite first appearances, psychological essentialism undermines a form of externalism that has become commonplace in the philosophy of mind and language. (shrink)

In this paper I argue that the most prominent and familiar features of Wittgenstein’s rule following considerations generate a powerful argument for the thesis that most of our concepts are innate, an argument that echoes a Chomskyan poverty of the stimulus argument. This argument has a significance over and above what it tells us about Wittgenstein’s implicit commitments. For, it puts considerable pressure on widely held contemporary views of concept learning, such as the view that we learn concepts by constructing (...) prototypes. This should lead us to abandon our general default hostility to concept nativism and be much more sceptical of claims made on behalf of learning theories. (shrink)