A variety of inaccurate claims about Gold's Theorem have appeared in the cognitive science literature. I begin by characterizing the logic of this theorem and its proof. I then examine several claims about Gold's Theorem, and I show why they are false. Finally, I assess the significance of Gold's Theorem for cognitive science.
Environmental degradation and extractive industry are inextricably linked, and the industry’s adverse impact on air, water, and ground resources has been exacerbated with increased demand for raw materials and their location in some of the more environmentally fragile areas of the world. Historically, companies have managed to control calls for regulation and improved, i.e., more expensive, mining technologies by (a) their importance in economic growth and job creation or (b) through adroit use of their economic power and bargaining leverage against (...) weak national governments, regional and international regulatory bodies. More recently, the industry has had to contend with another set of challenges that involved treatment of indigenous people and their traditional land rights, fair treatment of workers, human rights abuses, and bribery and corruption involving local officials and political leaders. These challenges currently fall outside the traditional areas of regulation and control. Nevertheless, they pose serious threat to the industry’s business practices because of their global scope, threat to company’s reputation, and long-term risks of political instability leading to increasing cost of capital. Industry has responded to these challenges by creating voluntary codes of conduct that would signify their intent to comply with higher standards of conduct, and assuage public opinion that no further action is called for. These codes, however, lack any monitoring mechanism and reporting integrity to assure the public that the industry members are indeed meeting their commitments. Consequently, pressure on the industry continues unabated and with ever increasing calls for mandatory regulation and oversight. This article examines the activities of one mining company, Freeport-McMoRan Copper & Gold, Inc., which has taken a radically different approach in responding to these challenges at its mining operations in West Papua, Indonesia. While cooperating with industry-based efforts of voluntary codes of conduct, Freeport also initiated a radically different response through its own voluntary code that would directly focus on issues of human rights, treatment of indigenous people on whose traditional land its mine was located; economic development and job creation and, improvements in health, education, and housing facilities, to name a few. Additionally, the company earmarked large sums of money and involved representatives of the indigenous people in their management and disbursement. The company took an even more radical action when it committed itself to independent external audits of the company’s compliance with the code, and that these findings and company’s responses would be made public without prior censorship by the company. We analyze the nature of corporate culture, vision and risk-taking propensities of its management that would impel the company to embark on a high risk strategy whose outcomes could not be predicted with any degree of certainty before the fact. The parent company also had to confront discontent among the management ranks at the mine site because of cultural differences and management styles of expatriates and local (Indonesian) managers. Finally, we discuss in some detail the extensive and intensive character of a two phase audit conducted by the outside monitors, their findings, and the process by which they were implemented and reported to general public. We also evaluate the strengths and challenges posed by such audits, their importance to the company’s future, and how such projects might be undertaken by other companies. (shrink)
Nietzsche's creative and fundamental account of chaos in both its cosmic, universal as well as its humane context, recalls the ancient Greek meaning of chaos rather than its modern, disordered, decadent significance. In this generatively primordial sense, chaos corresponds not to the watery nothingness of Semitic myth or modern, scientific entropy but creative, uncountenancedly abundant potency. And in such an archaic sense, Nietzsche's chaos is a word for both nature and art. Nietzsche's creative conception of chaos equates it with the (...) will to power: as the foundational essence of the world "to all eternity." This same correspondence is also the stylistic prerequisite for creating oneself as a work of art. /// O artigo começa por demonstrar até que ponto a mais fundamental explicação criadora dada por Nietzsche a respeito do caos, em seu contexto tanto cósmico e universal como meramente humano, constitui uma evocação do antigo sentido que Ihe foi dado pelos Gregos, mais do que uma adesão à significação moderna do mesmo, desordenada e decadente. Para Nietzsche, com efeito, o caos em seu sentido generativo mais primordial, não corresponde nem à ambiguidade do nada inerente ao mito semítico nem ao sentido moderno, científico, da entropia, mas sim a uma potência criadora assinalada por uma abundãncia inesgotável Mostra-se, assim, até que ponto, em conformidade com o sentido arcaico do termo, o caos em Nietzsche constitui um nome que se dá tanto à natureza como à arte. Mais, o presente artigo mostra ainda até que ponto a concepqao nietzschiana do caos o transforma em algo equivalente à vontade depoder, ou seja, na essãncia fundadora do mundo "para toda a eternidade". Desta correspondência, aliás, resulta a condição estilistica para que cada um se crie a si mesmo como verdadeira obra de arte. (shrink)
Much international debate over access to medicines focuses on whether patent law accords with international human rights law. This article argues that this is the wrong question to ask. Following an analysis of both patent and human rights law, this article suggests that the better approach is to focus on national debates over the best calibration of patent law to achieve national objectives.
I examine the implications of positing stuff (which occupies an ontological category distinct from things) as a way to avoid colocation in the case of the statue and the bronze that constitutes it. When characterising stuff, it’s intuitive to say we often individuate stuff kinds by appealing to things and their relations (e.g., water is water rather than gold because it is entirely divisible into subportions which constitute or partially constitute H2O molecules). I argue that if this intuition is correct, (...) there are important restrictions on how we can characterise stuff in order to avoid colocated portions of stuff. (shrink)
The main contribution of this paper is a new account of how a community may introduce a term for a natural kind in advance of knowing the correct scientific account of that kind. The account is motivated by the inadequacy of the currently dominant accounts of how a community may do this, namely those proposed by Kripke and by Putman. Their accounts fail to deal satisfactorily with the facts that (1) typically, an item that instantiates one natural kind instantiates several (...) - 'the higher-level natural kinds problem', and (2) natural kinds often occur in nature in impure form - 'the composition problem' .On the account I propose, a term for a natural kind gains its reference by being associated with a recognitional capacity for that kind. I show how members of a scientifically ignorant community could have a recognitional capacity for a natural kind, say gold, as opposed to a certain kind of appearance, for instance the appearance that gold actually has. I argue that members of such a community can have recognitional capacities for particular natural kinds despite the actual or possible existence of duplicate kinds, e.g. water. After developing the account in detail, I show how it can deal with the two problems faced by Kripke's and Putnam's problem. The case of natural kind terms is crucial to the central debate in the philosophy of language and the philosophy of mind about whether we can refer non-descriptively to objects and kinds in the world. I take the account I propose to be a non-descriptive account of linguistic reference to natural kinds that can be used to support externalism in the philosophy of mind. (shrink)
Marc Lange’s new book on laws offers a restatement and development of the account he proposed in Natural Laws and Scientific Practice (Oxford University Press, 2000), henceforth NLSP, and the new material is helpfully summarized in the preface. Laws and Lawmakers presents the key idea from NLSP in a rather more reader-friendly manner – this idea being roughly that the difference between laws and accidents is that laws, unlike accidents, form a ‘stable’ set, i.e. a logically closed set of truths (...) such that they would all still hold under any counterfactual supposition consistent with the set. So, for example, the natural laws all still hold under counterfactual suppositions such as ‘had this match been struck …’, ‘had Bill Gates wanted to build a gold cube one mile across’ and so on; thus this set is stable. But the set of laws plus the accidental claim ‘there is no gold cube one mile across’ fails to hold under such counterfactual suppositions because had Bill Gates wanted to build a gold cube one mile across, such a cube might well have come into existence; thus this set is not stable. While the basic outline and defence of this idea is provided in Chapter 1, those wishing to delve into the intricate …. (shrink)
This paper discusses the possibility of modelling inductive inference (Gold 1967) in dynamic epistemic logic (see e.g. van Ditmarsch et al. 2007). The general purpose is to propose a semantic basis for designing a modal logic for learning in the limit. First, we analyze a variety of epistemological notions involved in identification in the limit and match it with traditional epistemic and doxastic logic approaches. Then, we provide a comparison of learning by erasing (Lange et al. 1996) and iterated epistemic (...) update (Baltag and Moss 2004) as analyzed in dynamic epistemic logic. We show that finite identification can be modelled in dynamic epistemic logic, and that the elimination process of learning by erasing can be seen as iterated belief-revision modelled in dynamic doxastic logic. Finally, we propose viewing hypothesis spaces as temporal frames and discuss possible advantages of that perspective. (shrink)
In his Essay concerning Human Understanding, John Locke explicitly refers to Newton’s Philosophiae naturalis principia mathematica in laudatory but restrained terms: “Mr. Newton, in his never enough to be admired Book, has demonstrated several Propositions, which are so many new Truths, before unknown to the World, and are farther Advances in Mathematical Knowledge” (Essay, 4.7.3). The mathematica of the Principia are thus acknowledged. But what of philosophia naturalis? Locke maintains that natural philosophy, conceived as natural science (as opposed to natural (...) history), would give us demonstrations of the necessary connection between the (ultimately, simple) ideas constitutive of our complex ideas of various natural kinds of substances (e.g., gold). Indeed Locke goes so far as to suggest that a completely adequate natural science would also realize (perhaps, per impossibile) the goal of transforming the corpuscularian hypothesis into knowledge by demonstrating the necessary connection between the ‘microstructure’ (primary qualities of insensible corpuscles) of a particular natural kind of substance (e.g., gold) and the ideas of secondary qualities constitutive of the complex idea of that kind of substance. Locke’s conclusion concerning the possibility of the development of a natural science thus conceived is pessimistic: In vain therefore shall we endeavor to discover by our Ideas, (the only true way of certain and universal knowledge,) what other Ideas are to be found constantly joined with that of our complex Idea of any Substance: since we neither know the real Constitution of the minute Parts, on which their Qualities do depend; not, did we know them could we discover any necessary connexion between them, and any of their Secondary Qualities: which is necessary to be done, before we can certainly know their necessary co-existence (Essay, 4.3.14). It is understandable that, with such a conception of the science of nature, Locke found little of it in Newton’s Principia. In this paper, I further explore what might, perhaps with some hyperbole, be termed Locke’s ‘disappointment’ with the Prinicipia as a contribution to natural science. In particular, I argue that Locke’s adherence to the idealist epistemology of the Way of Ideas entails that mathematics cannot lend its certainty as a scientia to natural philosophy. Consequently, he finds more mathematics than natural philosophy in the Principia. (shrink)
Real kinds or categories, according to conventional wisdom, enter into lawlike generalizations, while nominal kinds do not. Thus, gold but not jewelry is a real kind. However, by such a criterion, few if any kinds or systems of classification employed in the social science are real, for the social sciences offer, at best, only restricted generalizations. Thus, according to conventional wisdom, race and class are on a par with telephone area codes and postal zones; all are nominal rather than real. (...) I propose an account of real kinds that recognizes the current reality of race but not zip codes and shows how a kind can be both constructed and real. One virtue of such an understanding of realism is the light shed on our current practice of racial classification. Race is not a real biological kind but neither is race a myth or illusion. However, the question of whether a social kind is real is separate from whether the category is legitimate. W. E. B. Du Bois maintained that while there are no biological races, race is real and should be conserved. My aim, in this paper, is not to argue for the legitimacy or conservation of race but to defend Du Bois's idea that kinds of people can be both made up and real and provide an understanding of realism that does justice to the social sciences. (shrink)
Rather than attempting to characterize a relation of confirmation between evidence and theory, epistemology might better consider which methods of forming conjectures from evidence, or of altering beliefs in the light of evidence, are most reliable for getting to the truth. A logical framework for such a study was constructed in the early 1960s by E. Mark Gold and Hilary Putnam. This essay describes some of the results that have been obtained in that framework and their significance for philosophy of (...) science, artificial intelligence, and for normative epistemology when truth is relative. (shrink)
My favourite leading question when teaching Philosophy of Mind is ‘Could a goldfish long for its mother?’ This introduces the philosophical technique of ‘conceptual analysis’, essential for the study of mind (Sloman 1978, ch. 4). By analysing what we mean by ‘A longs for B’, and similar descriptions of emotional states we see that they inv olve rich cognitive structures and processes, i.e. computations. Anything which could long for its mother, would have to hav e some sort of representation of (...) its mother, would have to believe that she is not in the vicinity, would have to be able to represent the _possibility _of being close to her, would have to desire that possibility, and would have to be to some extent pre-occupied or obsessed with that desire. That is, it should intrude into and interfere with other activities, like admiring the scenery, catching smaller fish, etc. If the desire were there, but could be calmly put aside, whilst other interests were pursued, then it would not be truly a state of longing. It might be a state of preferring. Thus longing involves computational interrupts. The same seems to be true of all emotions. (shrink)
The effect of gamma irradiation on the dislocation relaxation peak, i.e. the Bordoni peak, of high purity polycrystalline gold has been studied at frequency of 10MHz. It was found that the effect of gamma radiation is more significant in specimen irradiation at room temperature (1A) than that irradiated at liquid nitrogen temperature. The variation of the peak height, and temperature of the dislocation relaxation peak as a function of gamma doses are explained in terms of the Kink-Pair formation model.
Randomized Controlled Trials (RCTs) are currently the gold standard within evidence-based medicine. Usually, they are conducted as sequential trials allowing for monitoring for early signs of effectiveness or harm. However, evidence from early stopped trials is often charged with being biased towards implausibly large effects (e.g., Bassler et al. 2010). To our mind, this skeptical attitude is unfounded and caused by the failure to perform appropriate conditioning in the statistical analysis of the evidence. We contend that a shift from unconditional (...) hypothesis tests in the style of Neyman and Pearson to conditional hypothesis tests (Berger, Brown and Wolpert 1994) gives a superior appreciation of the obtained evidence and significantly improves the practice of sequential medical trials, while staying firmly rooted in frequentist methodology. (shrink)
We agree with Shors & Matzel's general hypothesis that the proposed link between NMDA-dependent LTP and memory is weak. They suggest that NMDA-dependent LTP is important to arousal or attentional processes which influence learning in an anterograde manner. However, current evidence is also consistent with the view that NMDA receptors modulate memory consolidation retroactively, as occurs in several other receptor classes.
A U-shaped curve in a cognitive-developmental trajectory refers to a three-step process: good performance followed by bad performance followed by good performance once again. U-shaped curves have been observed in a wide variety of cognitive-developmental and learning contexts. U-shaped learning seems to contradict the idea that learning is a monotonic, cumulative process and thus constitutes a challenge for competing theories of cognitive development and learning. U-shaped behavior in language learning (in particular in learning English past tense) has become a central (...) topic in the Cognitive Science debate about learning models. Antagonist models (e.g., connectionism versus nativism) are often judged on their ability of modeling or accounting for U-shaped behavior. The prior literature is mostly occupied with explaining how U-shaped behavior occurs. Instead, we are interested in the necessity of this kind of apparently inefficient strategy. We present and discuss a body of results in the abstract mathematical setting of (extensions of) Gold-style computational learning theory addressing a mathematically precise version of the following question: Are there learning tasks that require U-shaped behavior? All notions considered are learning in the limit from positive data. We present results about the necessity of U-shaped learning in classical models of learning as well as in models with bounds on the memory of the learner. The pattern emerges that, for parameterized, cognitively relevant learning criteria, beyond very few initial parameter values, U-shapes are necessary for full learning power! We discuss the possible relevance of the above results for the Cognitive Science debate about learning models as well as directions for future research. (shrink)
We give a new characterization of the hyperarithmetic sets: a set X of integers is recursive in e α if and only if there is a Turing machine which computes X and "halts" in less than or equal to the ordinal number ω α of steps. This result represents a generalization of the well-known "limit lemma" due to J. R. Shoenfield [Sho-1] and later independently by H. Putnam [Pu] and independently by E. M. Gold [Go]. As an application of this (...) result, we give a recursion theoretic analysis of clopen determinacy: there is a correlation given between the height α of a well-founded tree corresponding to a clopen game $A \subseteq \omega^\omega$ and the Turing degree of a winning strategy f for one of the players--roughly, f can be chosen to be recursive in 0 α and this is the best possible (see § 4 for precise results). (shrink)
We wish to defend Jonathan Westphal's view that colour is complex against a recent ‘phenomenological’ criticism of Eric Rubenstein. There is often thought to be a conflict between two kinds of determinants of colour, physical and phenomenal. On the one hand there are the complex physical facts about colour, such as the determination of a surface colour by an absorption spectrum. There is also, however, the fact that the apparently simple phenomenological quality of what is seen is a function of (...) the physiological and psychological state of the viewing subject. Should the physical trump the phenomenal, or is it the other way round? Much of the phenomenal variation of colour, however, is explained by physical facts. There is a physics and a psychophysics of colour. Colours appear, to the colour scientists at least, to be in some sense objective, a sense not explained by the view that they are purely phenomenal. Taking physics and psychophysics into account will mean rejecting the claim that the content of what our concepts of colours are concepts of is exhausted by the purely phenomenal, or that we can determine these concepts simply by gazing at a colour. Taking account of physics will lead, as Westphal argued, instead to a view about white and the other colour terms like Putnam's account of gold. Necessary truths about colours cannot be explained without reference to the logic of the compossibility of what is given in reflection and absorption spectra, the analogue of H2O. (shrink)
‘Water is H2O’ is one of the most frequently cited sentences in analytic philosophy, thanks to the seminal work of Saul Kripke and Hilary Putnam in the 1970s on the semantics of natural kind terms. Both of these philosophers owe an intellectual debt to the empiricist metaphysics of John Locke's Essay Concerning Human Understanding, while disagreeing profoundly with Locke about the reality of natural kinds. Locke employs an intriguing example involving water to support his view that kinds (or ‘species’), such (...) as water and gold, are the workmanship of the human mind. This is the point of his story about a winter visitor to England from Jamaica, who is astonished to find that the water in his basin has turned solid overnight, and proceeds to call it ‘hardened water’. Locke criticizes this judgement, maintaining that it is more consonant with common sense to regard water and ice as different kinds of substance. Putnam, by implication, disagrees. Deploying his imaginary example of Twin Earth—a distant planet where a watery-looking substance, XYZ, rather than H2O, fills the oceans and rivers—he maintains that common sense supports the judgement that XYZ and H2O, despite their superficial similarity, are not the same kind of substance, precisely because their molecular compositions are different. Here it will be argued that both views are mistaken, but that, in this dispute, Locke has more right on his side than his modern opponents do. (shrink)
Religion and the external world -- Projection, religion, and the external world -- The senses, reason and the imagination -- Realism, meaning and justification : the external world and religious belief -- Modality, projection and realism -- 'Our profound ignorance' : causal realism, and the failure to detect necessity -- Spreading the mind : projection, necessity and realism -- Into the labyrinth : persons, modality, and Hume's undoing -- Value, projection, and realism -- Gilding : projection, value and secondary qualities (...) -- The gold : good, evil, belief and desire -- The golden : relational values, realism and a moral sense. (shrink)
A framing effect occurs when an agent's choices are not invariant under changes in the way a decision problem is presented, e.g. changes in the way options are described (violation of description invariance) or preferences are elicited (violation of procedure invariance). Here we identify those rationality violations that underlie framing effects. We attribute to the agent a sequential decision process in which a “target” proposition and several “background” propositions are considered. We suggest that the agent exhibits a framing effect if (...) and only if two conditions are met. First, different presentations of the decision problem lead the agent to consider the propositions in a different order (the empirical condition). Second, different such “decision paths” lead to different decisions on the target proposition (the logical condition). The second condition holds when the agent's initial dispositions on the propositions are “implicitly inconsistent,” which may be caused by violations of “deductive closure.” Our account is consistent with some observations made by psychologists and provides a unified framework for explaining violations of description and procedure invariance. Footnotes1 We are grateful to Luc Bovens, Robin Cubitt and three anonymous reviewers for Economics and Philosophy for very helpful comments and suggestions. (shrink)
In Plato’s early dialogues, Socrates frequently asks questions of the form “What is X?” seeking definitions of the substitution instances of X (e.g., Justice, Piety, and Courage). In attempting to elucidate Socratic definition, a number of interpreters have invoked a distinction between real and nominal definition (the distinction between the definition of a thing and the definition of a word. In using that distinction, several interpreters have pointed out that, when Socrates asked his “What is X” question (e.g., “What is (...) Justice?”), he was not seeking a nominal definition (a definition of the word ‘διχαιοσύνή’), but rather a real definition (a definition of the thing, Justice). My purpose in this paper is to argue that the preceding interpretation of Socratic thought is mistaken, i.e., I shall argue that there is no real/nominal distinction to be found in the Socratic dialogues. (shrink)
Ethical mysticism, by S. Coit.--The ethical import of history, by D. S. Muzzey.--The tragic and heroic in life, by W. M. Salter.--Distinctive features of the ethical movement, by A. W. Martin.--Ethical experience as the basis of religious education, by H. Neumann.--"All men are created equal," by G. E. O'Dell.--How far is art an aid to religion? by P. Chubb.--Evolution and the uniqueness of man, by H. J. Bridges.--The spiritual outlook on life, by H. J. Golding.--The ethics of Abu'l Ala al (...) Ma'arri, by N. Schmidt.--Life's unused moral force, by H. Snell.--Is the ideal real? by G. A. Smith.--Some ethical tendencies in the professions, by R. D. Kohn.--On the art of living, by W. Boerner.--The relation of the ethical ideal to social reform, by J. L. Elliott.--Concerning tolerance, by R. F. Dewey.--Ethical culture in Germany after the war, by R. Penzig.--A confession of faith, by S. B. Weston.--"Hearing the witnesses," by J. Gutmann. (shrink)
