Descartes's Dioptrics is more than a mere technical treatise on optics; it is an essay in the "practical philosophy" that he claimed could render us "masters and possessors of nature." Descartes's practical intent is indicated first by the instrumentalist character of his derivation of the sine law of refraction, which is based on a heuristic and readily mathematizable model that requires no consideration of light's "true nature." Descartes's subsequent discussion of human vision is an extended critique of nature's workmanship that (...) grounds the possibility of improving vision by artificial means. I suggest that this critique is the source of Descartes's doctrine that the purpose of sensory perception is to preserve the mind-body composite, not to provide knowledge of the essential nature of things. Accordingly, the ultimate goal of the Dioptrics is to "master" human vision by raising it from a mere means of self-preservation to an instrument of scientific knowledge. -/- . (shrink)

This article draws attention to a pattern of development within science and other intellectual research communities that has received virtually no mention. We propose that subsequent dominance of a research community by a figure responsible for significant innovation often delays progress in the field. During the period in which the revolutionary continues to influence research in a community, far too frequently the effect is to freeze progress within the limited directions which the revolutionary sanctions.

In 2015, in preparation for implementation of the California End of Life Option Act, the UCLA Workgroup dedicated scores of hours to exploring the ethical underpinnings of aid-in-dying and the guid...

Central to the debate between Humean and anti-Humean metaphysics is the question of whether dispositions can exist in the absence of categorical properties that ground them (that is, where the causal burden is shifted on to categorical properties on which the dispositions would therefore supervene). Dispositional essentialists claim that they can; categoricalists reject the possibility of such ?baseless? dispositions, requiring that all dispositions must ultimately have categorical bases. One popular argument, recently dubbed the ?Argument from Science?, has appeared in one (...) or another form over much of the last century and purports to win the day for the dispositional essentialist. Taking its cue from physical theory, the Argument from Science treats the exclusively dispositional characterizations of the fundamental particles one finds in physical theory as providing a key premise in what has been called a ?decisive? argument for baseless dispositions. Despite sharing the intuition that dispositions can be baseless, I argue that the force and significance of the Argument from Science have been greatly overestimated: no version of the argument is close to decisive, and only one version succeeds in scoring points against the categoricalist. Not only is physical theory more ontologically innocent than defenders of baseless dispositions seem to appreciate, most versions of the Argument from Science neglect important ways that dispositions could be grounded by categorical properties. (shrink)

This study continues the anti-realist’s quest for a principled way to avoid Fitch’s paradox. It is proposed that the Cartesian restriction on the anti-realist’s knowability principle ‘ϕ, therefore 3Kϕ’ should be formulated as a consistency requirement not on the premise ϕ of an application of the rule, but rather on the set of assumptions on which the relevant occurrence of ϕ depends. It is stressed, by reference to illustrative proofs, how important it is to have proofs in normal form before (...) applying the proposed restriction. A similar restriction is proposed for the converse inference, the so-called Rule of Factiveness ‘3Kϕ therefore ϕ’. The proposed restriction appears to block another Fitch-style derivation that uses the KK -thesis in order to get around.. (shrink)

Both Kant and James claim to limit the role of knowledge in order to make room for faith. In this paper, we argue that despite some similarities, their attempts to do this come apart. Our main claim is that, although both Kant and James justify our adopting religious beliefs on practical grounds, James believes that we can—and should—subsequently assess such beliefs on the basis of evidence. We offer our own account of this evidence and discuss what this difference means for (...) their accounts of religious belief. (shrink)

Power theorists are divided on the question of whether individual powers are single-track (for a single manifestation type) or are multi-track (capable of producing distinct manifestation types for distinct stimuli). EJ Lowe has recently defended single-tracking, arguing that the multi-tracker can provide no adequate reason for treating powers as capable of having multiple manifestation types, and claiming that putative instances of multi-track powers are either single-track powers in need of unifying descriptions or are merely several single-track powers. I respond to (...) Lowe on behalf of the multi-tracker, first by arguing that he overlooks the extra-empirical features of the debate, then by posing a dilemma for any single-track account of powers concerning the single-tracker’s ability to appropriately deal with fine-grained manifestation types. Finally I provide the aforementioned reason for thinking that there are multi-track powers. (shrink)

I present a general theory of abstraction operators which treats them as variable-binding term- forming operators, and provides a reasonably uniform treatment for definite descriptions, set abstracts, natural number abstraction, and real number abstraction. This minimizing, extensional and relational theory reveals a striking similarity between definite descriptions and set abstracts, and provides a clear rationale for the claim that there is a logic of sets (which is ontologically non- committal). The theory also treats both natural and real numbers as answering (...) to a two-fold process of abstraction. The first step, of conceptual abstraction, yields the object occupying a particular position within an ordering of a certain kind. The second step, of objectual abstraction, yields the number sui generis, as the position itself within any ordering of the kind in question. (shrink)

All parties to the proceedings that follow concur with DS. The question is whether there is anything more to truth than can be gleaned from DS alone. Deflationism holds that there is nothing more to truth than this. Now it would appear that 'warrantedly assertible' can play the role of T in DS. Hence it would appear that the deflationist would be able to identify truth with warranted assertibility.

This study examines how the Gödel phenomena are to be treated in core logic. We show in formal detail how one can use core logic in the metalanguage to prove Gödel’s incompleteness theorems for arithmetic even when classical logic is used for logical closure in the object language.

Mitochondrial function is achieved through the cooperative interaction of two genomes: one nuclear (nuDNA) and the other mitochondrial (mtDNA). The unusual transmission of mtDNA, predominantly maternal without recombination is predicted to affect the fitness of male offspring. Recent research suggests the strong sexual dimorphism in aging is one such fitness consequence. The uniparental inheritance of mtDNA results in a selection asymmetry; mutations that affect only males will not respond to natural selection, imposing a male‐specific mitochondrial mutation load. Prior work has (...) implicated this male‐specific mutation load in disease and infertility, but new data from fruit flies suggests a prominent role for mtDNA in aging; across many taxa males almost invariably live shorter lives than females. Here we discuss this new work and identify some areas of future research that might now be encouraged to explore what may be the underpinning cause of the strong sexual dimorphism in aging.Editor's suggested further reading in BioEssays: Mitonuclear match: Optimizing fitness and fertility over generations drives ageing within generations AbstractMitochondrial manoeuvres: Latest insights and hypotheses on mitochondrial partitioning during mitosis in Saccharomyces cerevisiae AbstractMitochondria and the culture of the Borg Abstract. (shrink)

Abstractabstract:In his Pragmatism lectures, William James argued that philosophers' temperaments partially determine the theories that they find satisfying, and that their influence explains persistent disagreement within the history of philosophy. Crucially, James was not only making a descriptive claim, but also a normative one: temperaments, he thought, could play a legitimate epistemic role in our philosophical inquiries. This paper aims to evaluate and defend this normative claim.There are three problems for James's view: (1) that allowing temperaments to play a role (...) within inquiry replaces philosophical disagreement with psychological difference; (2) that including temperaments would allow arbitrary elements to influence the outcome of inquiry; and (3) that such a view assumes an implausible metaphysical picture. Through clarifying the nature of temperaments, and what counts as a satisfactory philosophical theory on a pragmatist account, this paper presents an interpretation of James's metaphilosophical claims that can provide satisfactory responses to these problems. (shrink)

AGM-theory, named after its founders Carlos Alchourrón, Peter Gärdenfors and David Makinson, is the leading contemporary paradigm in the theory of belief-revision. The theory is reformulated here so as to deal with the central relational notions 'J is a contraction of K with respect to A' and 'J is a revision of K with respect to A'. The new theory is based on a principal-case analysis of the domains of definition of the three main kinds of theory-change (expansion, contraction and (...) revision). The new theory is stated by means of introduction and elimination rules for the relational notions. In this new setting one can re-examine the relationship between contraction and revision, using the appropriate versions of the so-called Levi and Harper identities. Among the positive results are the following. One can derive the extensionality of contraction and revision, rather than merely postulating it. Moreover, one can demonstrate the existence of revision-functions satisfying a principle of monotonicity. The full set of AGM-postulates for revision-functions allow for completely bizarre revisions. This motivates a Principle of Minimal Bloating, which needs to be stated as a separate postulate for revision. Moreover, contractions obtained in the usual way from the bizarre revisions, by using the Harper identity, satisfy Recovery. This provides a new reason (in addition to several others already adduced in the literature) for thinking that the contraction postulate of Recovery fails to capture the Principle of Minimal Mutilation. So the search is still on for a proper explication of the notion of minimal mutilation, to do service in both the theory of contraction and the theory of revision. The new relational formulation of AGM-theory, based on principal-case analysis, shares with the original, functional form of AGM-theory the idealizing assumption that the belief-sets of rational agents are to be modelled as consistent, logically closed sets of sentences. The upshot of the results presented here is that the new relational theory does a better job of making important matters clear than does the original functional theory. A new setting has been provided within which one can profitably address two pressing questions for A GM-theory: (1) how is the notion of minimal mutilation (by both contractions and revisions) best analyzed? and (2) how is one to rule out unnecessary bloating by revisions? (shrink)

This article begins by assessing the ways in which the life and work of Neil MacCormick exemplified a dual commitment to the local and particular—especially through his advocacy of nationalism—and to the international and the universal. It then concentrates on one of the key tensions in his work which reflected that duality, namely the tension between his longstanding endorsement of constitutional pluralism—and so of the separate integrity of different “local” constitutional orders—and his belief in some kind of unity, and (...) so community, residing in the moral and rational properties of all law. The article continues by considering a number of ways in which this tension may be resolved. It concludes, with particular reference to MacCormick's late work on ethics, that the answer may be found through the idea of a general unity of practical reason which undergirds the various special orders of practical reason by which particular legal systems are distinguished. (shrink)

Powers theorists frequently assert that their neo-Aristotelian frameworks are dynamic, and that this gives them a theoretical advantage over their neo-Humean rivals. But recently it’s been claimed that activity can also be used to divide powers theories themselves. Dynamism is here understood primarily in terms of activity: a metaphysic counts as dynamic according to the place activity is given within the system. Activists treat activity as fundamental or irreducible, and claim to have the philosophical high ground over those ‘passivist’ powers (...) theories wherein activity is reducible or nonfundamental. In this paper I take a closer look at dynamism within powers theories, with a particular focus on how the activism/passivism distinction might be made. I then consider the broader ontological impact that the various commitments to activity might carry, along with an assessment as to who appears to be better off. Despite what’s been claimed, I find no reason to think that activists have any serious theoretical advantage in this debate. In fact, as things presently stand, I am not convinced that powers and activity make for a good pairing at all, as there’s presently no good model for powers like this. (shrink)

It would not be an exaggeration to say that pluralism was central to the philosophical thought of William James. Repeatedly, James claimed that the difference between monism and pluralism was the "most pregnant" in philosophy.1 Radical empiricism, James's distinctive metaphysical vision, was first introduced as the view that pluralism was a plausible hypothesis about the permanent state of the world, and this pluralism continued to be a central feature of his philosophy in later years.2The assertion that pluralism was a valid (...) philosophical hypothesis was not merely theoretical, but practical. James often connected pluralism with democracy, and monism with "despotism" (James... (shrink)

Rightly or, wrongly I am going to take it that the doctrine of simple qualities says three things. First, that yellow, for example, is a simple unanalyzable quality. I don’t really believe this to be true, except in what it denies, but I have no immediate quarrel with it. Second, a simple quality, such as yellow, is what it is quite independently of its pattern of exemplification. Third, yellow is somehow ineffable, the sheer dazzling yellowishness of yellow things cannot be (...) conveyed in words. In the third case, I do not mean the commonplace that words are different from things, that the word ‘yellow’ is not itself yellow. I mean the view that there is something about color qualities as immediately apprehended by us that eludes description. Now all these views are somewhat old-fashioned. The third is hardly mentioned nowadays. Yet I am not so sure that we are not still very much in their grip. In any case, philosophical hemlil)eS oscillate almost as frequently as do those of high fashion so it should not surprise anyone if these views were to come back into vogue, especially if phenomenology becomes important in this country. Now it may be more a matter of convenience than of historical accuracy that I am lumping these three doctrines together as “the doctrine of simple qualities”. Perhaps “doctrine of atomistic qualities” would be better. I am reasonably certain that the second and third doctrines mutually entail each other, although it has to be conceded that the situation is fairly complicated. I shall have something to say about the third doctrine–the doctrine of ineffability, but I shall be mostly concerned to refute the second doctrine–the doctrine that the identity of a quality is independent of its extension–and to put something else in its place. I shall be concerned incidentally to examine certain puzzling statements like ‘Red is a color’, ‘Red is between orange and purple’ and ‘Whatever is green is extended’, which seem to be necessary but don’t seem to be analytic. (shrink)

ABSTRACT The well-known AGM-theory-contraction and theory-revision, due to Alchourrón, Gärdenfors and Makinson, relies heavily on the so-called postulate of recovery. This postulate is supposed to capture the requirement of “minimum mutilation”; but it does not. Recovery can be satisfied even when there is more mutilation than is necessary. Recovery also ensures that very often too little is given up in a contraction, in this paper I bring out clearly the deficiencies of the AGM-theory in these two regards, showing how it (...) is doubly off-beam. I show that some of the most serious inadequacies of the AGM-theory derive from early claims in some of its founding contributions, claims that have not been seriously questioned within the tradition since. The upshot of these investigations is that recovery cannot, and should not, be recovered. Theory contraction is hysteretic. Whether the AGM-theory can now recover is a good question. (shrink)

This article uses nationwide survey data to answer two questions: who participates in environmental governance in China and why? First it explores the social structural characteristics that distinguish participants, finding that city dwellers, the more educated and those with higher incomes and higher social status are more likely to participate, while women, the elderly, those with rural residence registration and migrants are less likely. It then tests two main explanations as to why people participate in environmental governance: instrumentality and identity. (...) Participation is associated with attention to conservation issues, the perceived effectiveness of local environmental governance, knowledge of environmental problems, reading newspapers and magazines, voting in local elections, identification with a middle-class lifestyle and observance of Western holidays. Combining the analyses into a structural model shows that instrumental and identity-related variables account for nearly all of the social structural variation in participation. Participation is thus a function both of instrumental considerations and identities. (shrink)

John Heil’s From an Ontological Point of View (Heil 2003) is a tremendous philosophical work. The neo-Lockean ontology the reader finds within its 267 pages is a sensible and refreshing alternative to the neo-Humean ontologies which presently occupy the vast majority of the metaphysical literature. What Heil offers is a much needed change in perspective. Nor are the strengths of the book limited to Heil’s willingness to approach central metaphysical problems in largely untried and unpopular way; the book is very (...) clear in its presentation, accessible to wide readership, and tightly argued throughout. Heil’s efforts in this book are to be applauded, and the result is one that warrants serious consideration by all those interested in serious metaphysics. But the interest should not end there: the lessons of Heil’s book are ones that almost all philosophers ought to take seriously. Despite the criticism that follows, my overall position should not be taken as anything short of a whole-hearted endorsement of Heil’s book. Nonetheless, when philosophy is one’s trade, there is always going to be something to disagree about, however much one is amenable to a view. (shrink)

This paper suggests that Jean‐Jacques Rousseau, John Dewey, and Paulo Freire each engage in philosophical projects that seek to employ the practice of philosophy as a means to the development of the person and as a political and educational method of philosophy that aims to discover and answer the problems of cooperative associations. The paper argues that the philosophical projects of Rousseau, Dewey, and Freire are intimately related in approach, scope, and intent. Furthermore, it argues that by reading Rousseau, Dewey, (...) and Freire in conversation with one another, their philosophical projects can be effectively employed in an inquiry into citizenship and citizenship education and accordingly as the foundation for a fruitful philosophical methodology that is both political and educational. (shrink)

Some ideas gain currency as soon as there is a linguistic medium of exchange. Truth is one such. Its role in our intellectual economy is much like that of money in the real one. Canonical warrants to make assertions are like gold bars. Truth-claims are like paper money: promises to produce gold bars on demand.

This study takes a careful inferentialist look at Graham Priest’s Logic of Paradox. I conclude that it is sorely in need of a proof-system that could furnish formal proofs that would regiment faithfully the “naïve logical” reasoning that could be undertaken by a rational thinker within LP.

I reviewed Pope Francis’s Address as one acutely aware of the extremely murky psycho-political cloud surrounding womb-determinism in the United States, and coming to it without any religion-based predisposition on the issue.I made note that Pope Francis’s main point is not proscriptive. He gives a low profile to any dogmatic definition of the sanctity of life. His tone is humane, not doctrinal.The Pope proposes that the fetus, like the child who follows, is basically a messenger, communicating from the womb and (...) creating the universe that will define the mother, the family, and the wider community. This point is not moral—he calls it “pre-religious”—but semiotic, concerned with the nature and structure of how we... (shrink)