A different picture of learning is suggested by Karl Popper's account of knowledge growing through 'conjectures and refutations'. The facts of human language are best explained by taking language acquisition to be a case of Popperian learning.

Chomsky has constructed an empirical theory about syntactic universals of natural language by defining a class of 'possible languages' which includes all natural languages (inter alia) as members, and claiming that all natural languages fall .within a specified proper subset of that class. I extend Chomsky's work to produce an empirical theory about natural4anguage semantic universals by showing that the semantic description of a language will incorporate a logical calculus, by defining a relatively wide class of 'possible calculi', and by (...) specifying a proper subset of that class which, I hypothesize, includes the calculi needed for the semantic description of any natural language. I argue that the special status, with respect to natural languages, of this particular type of logical calculus is an empirical finding which does not follow from any independently-known principles, and I conclude that the question why the laws of human thought have the structure they do is a biological rather than a logical question. (shrink)

FERDINAND DE SAUSSURE, rev. ed. by Jonathan Culler Iíhaca, N.Y.: Cornell University Press, 1986. 157pp., $23.50 IN SEARCH OF SEMIOTICS by David Sless Totawa, N.J.: Barnes & Noble, 1986. 170pp., $28.50.

Problems Section. Problem 3 by Richard Sharvy. Solution to Problems 1 and 2 from previous issue (3:1).

Notice that this paper has not claimed that all natural languages are CFL's. What it has shown is that every published argument purporting to demonstrate the non-context-freeness of some natural language is invalid, either formally or empirically or both.18 Whether non-context-free characteristics can be found in the stringset of some natural language remains an open question, just as it was a quarter century ago.Whether the question is ultimately answered in the negative or the affirmative, there will be interesting further questions (...) to ask. If it turns out that natural languages are indeed always CFL's, it will be reasonable to ask whether this helps to explain why speakers apparently recognize so quickly whether a presented utterance corresponds to a grammatical sentence or not, and to associate structural and semantic details with it. It might also be reasonable to speculate about the explanation for the universally context-free character of the languages used by humans, and to wonder whether evolutionary biological factors are implicated in some way (Sampson (1979) could be read in this light). And naturally, it will be reasonable to pursue the program put forward by Gazdar (1981, in press) to see to what extent CFL-inducing grammatical devices can be exploited to yield insightful descriptions of natural languages that capture generalizations in revealing ways.If a human language that is not a CFL is proved to exist, on the other hand, a different question will be raised: give the non-context-free character of human languages in general, why has this property been so hard to demonstrate that it has taken over twenty-five years to bring it to light since the issue was first explicitly posed? If human languages do not have to be CFL's, why do so many (most?) of them come so close to having the property of context-freeness? And, since the CFL's certainly constitute a very broad class of mathematically natural and computationally tractable languages, what property of human beings or their communicative or cognitive needs is it that has caused some linguistic communities to reach beyond the boundaries of this class in the course of evolving a linguistic system?Either way, we shall be interested to see our initial question resolved, and further questions raised. One cautionary word should be said, however, about the implications (or lack of them) that the answer will have for grammatical studies. Chomsky has repeatedly stated that he does not see weak generative capacity as a theme of central importance in the theory of grammar, and we agree. It is very far from being the case that the recent resurgence of interest in exploring the potential of CF-PSG or equivalent systems will, or should, be halted dead in its tracks by the discovery (if it is ever forthcoming) that some natural language is not a CFL. In the area of parsing, for instance, it seems possible that natural languages are not only parsed on the basis of constituent structure such as a CF-PSG would assign, but are parsed as if they were finite state languages (see Langendoen (1975) and Church (1980) for discussion along these lines). That is, precisely those construction-types that figure in the various proofs that English is not an FSL appear to cause massive difficulty in the human processing system; the sentences crucial to the proofs are for the most part unprocessable unless they are extremely short (yet the arguments for English not being and FSL only go through if length is not an issue). This means that in practice properties of finite state grammars are still of great potential importance to linguistic theory despite the fact that they do not provide the framework for defining the total class of grammatical sentences. The same would almost certannly be true of CF-PSG's if they were shown to be inadequate in a similar sense. It is highly unlikely that the advances made so far in far in phrase structure description could be nullified by a discovery about weak generative capacity. Moreover, there are known to be numerous ways in which the power of CF-PSG's can be marginally enhanced to permit, for example, xx languages to be generated without allowing anything like the full class of recursively enumerable or even context-sensitive languages (see Hopcroft and Ullmann (1979), Chapter 14) for an introduction to this topic, noting especially Figure 14.7 on p. 393. The obvious thing to do if natural languages were ever shown not to be CFL's in the general case would be to start exploring such minimal enhancements of expressive power to determine exactly what natural languages call for in this regard and how it could be effectively but parsimoniously provided in a way that closely modelled human linguistic capacities.In the meantime, it seems reasonable to assume that the natural languages are a proper subset of the infinite-cardinality CFL's until such time as they are validly shown not to be. (shrink)

Arguments from disagreement against moral realism begin by calling attention to widespread, fundamental moral disagreement among a certain group of people. Then, some skeptical or anti-realist-friendly conclusion is drawn. Chapter 2 proposes that arguments from disagreement share a structure that makes them vulnerable to a single, powerful objection: they self-undermine. For each formulation of the argument from disagreement, at least one of its premises casts doubt either on itself or on one of the other premises. On reflection, this shouldn’t be (...) surprising. These arguments are intended to support very strong metaphysical or epistemological conclusions about morality. They must therefore employ very strong metaphysical or epistemological premises. But, given the pervasiveness of disagreement in philosophy, especially about metaphysics and epistemology, very strong premises are virtually certain to be the subject of widespread, intractable disagreement—precisely the sort of disagreement that proponents of these arguments think undermine moral claims. Thus, these arguments undermine their own premises. If Chapter 2’s argument is sound, it provides realists with a single, unified strategy for responding to any existing or forthcoming arguments from disagreement. (shrink)

One of the deepest and longest-lasting debates in ethics concerns a version of the Euthyphro question: are choiceworthy things choiceworthy because agents have certain attitudes toward them or are they choiceworthy independent of any agents’ attitudes? Reasons internalists, such as Bernard Williams, Michael Smith, Mark Schroeder, Sharon Street, Kate Manne, Julia Markovits, and David Sobel answer in the first way. They think that all of an agent’s normative reasons for action are grounded in facts about that agent’s pro-attitudes (e.g., her (...) desires, valuing states, normative judgments). According to the most popular brand of internalism, idealizing internalism, an agent’s reasons are grounded, not in her actual pro-attitudes, but rather in what her pro-attitudes would be in suitably idealized conditions. Idealizing internalists presuppose that, for any agent with an irrational set of attitudes, there is one uniquely rational set that that agent would have if she were to undergo the relevant idealizing process. I argue that this assumption is false and that it raises two puzzles for idealizing internalism: one about the existence of practical reasons and another about their normative weight. I argue that idealizing internalists have an adequate solution to the first puzzle but not the second. Indeed, when they try to solve the second puzzle, they confront a dilemma. This second puzzle and the associated dilemma thus constitutes a powerful, but so far unnoticed, difficulty for idealizing internalism. (shrink)

This article asserts the significance of the portrayal of the political art of statesmanship as weaving, and aims to show how this image emphasizes two main aspects of the political art of statesmanship. Firstly, the image implies a three-dimensionality, both through the process of weaving and through the thickness of the protective fabric this produces, that in turn indicates the vital aspect of corporeality in politics. Secondly, weaving as a paradigmatic example of the art of statesmanship presents a way of (...) incorporating different entities and joining diverse threads into a cohesive unity, without reducing them to a form of sameness as mere mathematical counting would. These two aspects are in turn connected to an emphasis on the importance in good statesmanship of recognizing the specificity of the occasion and the variety and difference of the innumerable qualities to be interlaced in weaving the fabric of a good society. (shrink)

Locke is famed for his caution in speculative matters: “Men, extending their enquiries beyond their capacities and letting their thoughts wander into those depths where they can find no sure footing; ‘tis no wonder that they raise questions and multiply disputes”. And he is skeptical about the pretensions of natural philosophy, which he says is “not capable of being made a science”. And yet Locke is confident that “Our reason leads us to the knowledge of this certain and evident truth, (...) that there is an eternal, most powerful and most knowing being; which whether anyone will please to call God it matters not”. His certainty about the existence and attributes of God, I will argue, led him to surprisingly strong convictions about a deep and disputed problem at the intersection of seventeenth century metaphysics and natural philosophy: the absolute reality of space and time. Specifically, he based his absolutist conceptions of space and time on God’s literal omnipresence and eternity. Leibniz probably had Locke in mind when he inveighed in 1716 against “real absolute space, the idol of some modern Englishmen”. And Leibniz was right a decade earlier to voice through his mouthpiece Theophilus the suspicion that, despite Locke’s claim to know nothing about the substance of void space, “there are grounds for thinking you know more about it than you say or believe that you do. Some people have thought that God is the place of objects”. (shrink)

In his recent article entitled ‘Can We Believe the Error Theory?’ Bart Streumer argues that it is impossible (for anyone, anywhere) to believe the error theory. This might sound like a problem for the error theory, but Streumer argues that it is not. He argues that the un-believability of the error theory offers a way for error theorists to respond to several objections commonly made against the view. In this paper, we respond to Streumer’s arguments. In particular, in sections 2-4, (...) we offer several objections to Streumer’s argument for the claim that we cannot believe the error theory. In section 5, we argue that even if Streumer establishes that we cannot believe the error theory, this conclusion is not as helpful for error theorists as he takes it to be. (shrink)

Are historians storytellers? Is it possible to tell true stories about the past? These are just a couple of the questions raised in this comprehensive collection of texts about philosophy, theory, and methodology of writing history. Drawing together seminal texts from philosophers and historians, this volume presents the great debate over the narrative character of history from the 1960s onwards. The History and Narrative Reader combines theory with practice to offer a unique overview of this debate and illuminates the practical (...) implications of these philosophical debates for the writing of history. The editor's introduction offers a succinct survey of the subject to support the readings, which explore the role of narrative in everything from historical understanding and human action to linguistics and the practice of history. Including the work of F. R. Ankersmit, David Carr, Hayden White, W. H. Dray, and Frederick Olafson; a detailed bibliography; and a glossary of key concepts, this collection will prove an invaluable resource for students of historical theory and methodology. (shrink)

ABSTRACT The Great Exhibition of 1851 is generally interpreted as a thoroughly secular event that celebrated progress in science, technology, and industry. In contrast to this perception, however, the exhibition was viewed by many contemporaries as a religious event of considerable importance. Although some religious commentators were highly critical of the exhibition and condemned the display of artifacts in the Crystal Palace as giving succor to materialism, others incorporated science and technology into their religious frameworks. Drawing on sermons, tracts, and (...) the religious periodical press, this essay pays close attention to the ways in which science and technology were endowed with providentialist significance and particularly examines the notion of human progress used by a number of Christian writers, especially Congregationalists, who set scientific and technological progress within a teleological religious perspective. This discussion sheds fresh light not only on the Great Exhibition itself but also on the deployment of natural theology in mid-nineteenth-century Britain. (shrink)

This extraordinary book offers a clear and compelling biography of Jacques Derrida along with one of Derrida's strangest and most unexpected texts. Geoffrey Bennington's account of Derrida leads the reader through the philosopher's familiar yet widely misunderstood work on language and writing to the less familiar themes of signature, sexual difference, law, and affirmation. In an unusual and unprecedented "dialogue," Derrida responds to Bennington's text by interweaving Bennington's text with surprising and disruptive "periphrases." Truly original, this dual and dueling (...) text opens new dimensions in Derrida's thought and work. "Bennington is a shrewd and well-informed commentator whose book should do something to convince the skeptics... that Jacques Derrida's work merits serious attention."—Christopher Norris, _New Statesman & Society_ "Geoffrey Bennington and Jacques Derrida have presented a fascinating example of what might be called post-structuralist autobiography."—Laurie Volpe, _French Review_ "Bennington's account of what Derrida is up to is better in almost all respects—more intelligent, more plausible, more readable, and less pretentious—than any other I have read."—Richard Rorty, _Contemporary Literature_. (shrink)