The Science Museum, London, has recently acquired four fragments of a portable sundial with associated calendrical gearing. All the fragments are made of low zinc brass of substantially the same composition. The sundial is of a type known in other examples, some the products of recent archaeological excavations and all dated to the Late Antique or Early Byzantine period. Dating by the place names included in the latitude table, by the style of the heads of the planetary gods used to (...) identify the days of the week, and by the style of the script, all indicate that the instrument dates from the late fifth century of the Christian era or the first half of the sixth.The gearing, of which two arbors survive, carrying four toothed wheels and one ratchet, seems to have resembled that of a calendrical device described by al-Bīrūnī in about AD 1000. Like al-Bīrūnī's device and the geared calendar associated with a Persian astrolabe of AD 1221/2 now in the Museum of the History of Science, Oxford, the Byzantine instrument displayed the shape of the Moon and its age in days. Probably the calendar further resembled its Islamic counterparts in also displaying the positions of Sun and Moon in the Zodiac.The emergence of Byzantine mathematical gearing indicates that the Hellenistic tradition attested by the Antikythera machine continued to be active in the Byzantine period, and suggests that it may have influenced the Islamic tradition. Once again an artefact has shown up the inadequacy of the evidence derived from literary sources. (shrink)

This considerably revised second edition of Wittgenstein's 1914-16 notebooks contains a new appendix with photographs of Wittgenstein's original work, a new preface by Elizabeth Anscombe, and a useful index by E.D. Klemke. Corrections have been made throughout the text, and notes have been added, making this the definitive edition of the notebooks. The writings intersperse Wittgenstein's technical logical notations with his thoughts on the meaning of life, happiness, and death. "When the first edition of this collection of remarks appeared in (...) 1961 we were provided with a glimpse of the workings of Wittgenstein's mind during the period when the seminal ideas of the _Tractatus Logico-Philosophicus_ were being worked out. This second edition provided the occasion to be struck anew by the breadth, rigor, and above all the restlessness of that mind."—T. Michael McNulty, S. J., _The Modern Schoolman_. (shrink)

We discuss our surgical philosophy concerning the subtle interplay between the size of the surgical margin taken and the resultant morbidity from ablative oncological. procedures, which is ever more evident in the treatment of head and neck malignancy. The extent of tissue resection is determined by the "trade off" between cancer control and the perioperative, functional and aesthetic morbidity and mortality of the surgery. We also discuss our dilemmas concerning recent minimally invasive endoscopic microsurgical. techniques for the trans-oral laser removal. (...) or co-ablation of aero-digestive tract tumours, which result in a minimal. surgical margin of oncological clearance. By a process of inductive argument as to the nature of the surgical margin, we consider whether the risks of taking a lesser margin with adjuvant therapy is justified by the attendant gain in reduced surgical morbidity and the possible costs in tumour control. (c) 2006 Elsevier Ltd. All rights reserved. (shrink)

Although eye tracking has been used extensively to assess cognitions for static stimuli, recent research suggests that the link between gaze and cognition may be more tenuous for dynamic stimuli such as videos. Part of the difficulty in convincingly linking gaze with cognition is that in dynamic stimuli, gaze position is strongly influenced by exogenous cues such as object motion. However, tests of the gaze‐cognition link in dynamic stimuli have been done on only a limited range of stimuli often characterized (...) by highly organized motion. Also, analyses of cognitive contrasts between participants have been mostly been limited to categorical contrasts among small numbers of participants that may have limited the power to observe more subtle influences. We, therefore, tested for cognitive influences on gaze for screen‐captured instructional videos, the contents of which participants were tested on. Between‐participant scanpath similarity predicted between‐participant similarity in responses on test questions, but with imperfect consistency across videos. We also observed that basic gaze parameters and measures of attention to centers of interest only inconsistently predicted learning, and that correlations between gaze and centers of interest defined by other‐participant gaze and cursor movement did not predict learning. It, therefore, appears that the search for eye movement indices of cognition during dynamic naturalistic stimuli may be fruitful, but we also agree that the tyranny of dynamic stimuli is real, and that links between eye movements and cognition are highly dependent on task and stimulus properties. (shrink)

MORRIS: But come back to that other kind of fiction, in which the author himself is involved with his works, not merely in writing something for other people but in writing what seems to be necessary to his conscious existence, to his sense of well-being. For such a writer, when he finished with something he finishes with it; he is not left with continuations that he can go on knitting until he runs out of yarn. This conceit reflects my own (...) experience as a writer, relying on the sap that keeps rising, the force that drives the flower, as Dylan Thomas put it. It is plantlike. We put it in the sun and when it doesn't grow, we take it and put it in another room. I don't think of repotting the plant. The plant must make its own way. BOOTH: I like the organic metaphor, but I keep wanting to come back to particular cases to see how you actually work, in literal detail. Even the organic novelist obviously still has the matter of collecting notes, starting a novel, having it fail to go. Let me put a simple question, and move out from there. How many actual novels, whether they ever reach fruition or not, do you have "growing" at a given time? MORRIS: You don't mean simultaneously? BOOTH: I mean actual notes that exist in some kind of manuscript form, starts on a novel, something you are actually working on. MORRIS: It is so unusual for me to have more than one or two things in mind at once that I don't find this a fruitful question. Wright Morris's work as a novelist, essayist, and photographer is examined by prominent critics in Conversations with Wright Morris; the collection, edited by Robert E. Knoll, was published in the spring of 1977 by the University of Nebraska Press. "The Writing of Organic Fiction" is a chapter in that book. Wayne C. Booth's other contributions to Critical Inquiry include "Kenneth Burke's Way of Knowing" ,"Irony and Pity Once Again: Thais Revisited" , "M.H. Abrams: Historian as Critic, Critic as Pluralist" , “'Preserving the Exemplar': Or, How Not to Dig our Own Graves" , "Notes and Exchanges" , "Metaphor as Rhetoric: The Problem of Evaluation" ,"Ten Literal 'Theses" , and, with Robert E. Streeter, W.J.T. Mitchell: "Sheldon Sacks 1930-1979". (shrink)

The history of contemporary modal logic dates back to the writings of C. S. Lewis in the early part of this century. Since then, a growing body of literature has attested to professional interest in the area, and in a number of related issues in philosophical logic which have received wide attention. The recent development of powerful formal techniques for modal system building, together with an increasing interest in modal logic as a tool for philosophical analysis, have created a need (...) for an up-to-date text to introduce students to this material. Snyder's book attempts to answer this need. Assuming an understanding of elementary propositional logic, Snyder introduces a reductive technique called cancellation for detecting the theorems of a system of logic. This technique, analogous to the construction of Smullyan trees but more compact, is extended to modal and quantified contexts. Cancellation versions of the systems M and Mn of G. H. von Wright, and S4 and S5 of Lewis are developed. Snyder uses a Hintikka type of semantics, showing how the various formal systems are differentiated at the semantic level by differing conditions which must be imposed on the model systems used as interpretations for them. These model systems, and the conditions imposed upon them, are in turn described by means of a metalanguage which is essentially first-order quantificational logic. The power of this technique stems from the fact that for every object language formula of a system, there is a corresponding formula in the metalanguage which describes the conditions an interpretation must meet in order to satisfy the original formula. The conditions that the interpretations of a given system of logic must meet are reflected in this metalanguage as "antecedent assumptions," and these in turn correspond to cancellation rules for the object language. This correspondence is constructed in such a way that the metalinguistic counterpart of each theorem of the system will be a theorem of first-order logic. Snyder's primary interest is in showing how modal logic can be used, with the help of these techniques, to build a large variety of formal systems and to "tailor" such systems to meet a variety of analytical tasks. Simple modal systems are developed for the articulation of a number of modal concepts, in addition to the classic alethic ones. Examples are taken from temporal, deontic, and epistemic logic to show how specific interpretations of the meanings of the relevant operators lead to the incorporation of appropriate conditions in the formal systems used to articulate them. An entire chapter is devoted to a discussion of the paradoxes of material and strict implication, and to an attempt to articulate the notion of entailment through the development of formal systems which include a dyadic modal operator that is free of these paradoxes. The final chapter discusses such classical issues as proper names, reference, fictional entities, definite descriptions, and existence presuppositions. Appendices deal with such matters as the equivalence of the cancellation systems to more classical axiomatic-deduction systems, and the sketch of a proof of soundness and completeness for all the modal systems presented. While designed as a text, this volume should be of interest to both logicians and those working in metaphysics and language analysis, since the primary concern of the author is to develop techniques that will facilitate the usefulness of modal logic as a tool for philosophical analysis. The instructor's manual contains many suggestions derived from the author's experience in teaching this non-standard treatment of the subject.--K. T. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:BOOK REVIEWS 263 articles, and supplementing his anthology of Wright (Liberal Arts Press). The biographical chapter presents Wright as an attractive character among devoted friends and also as a solitary, original scientist. Wright's primary achievement was to apply utilitarian principles to Darwinian natural selection theory. Since Darwin himself made no such attempt, nor did John Stuart Mill, and since Darwin showed an evident interest in (...) class='Hi'>Wright's attempt, this represents a major contribution to evolutionary theory. On the negative side, too, Wright was incisive in his criticisms of Spencer, Mivart, Hamilton, Mansel, and Lewes. The pragmatic strains in Wright's philosophical method were incidental to his primary interest in showing that sciences are metaphysically "neutral." But his influence on Peirce and James was direct and strong, both on their cosmological and methodological doctrines. He deserves to be mentioned as the prime mover in this trinity of early pragmatism and naturalism, but since his own writings were relatively few and scattered, his historical importance rests largely on the use which Peirce and James made of his ideas and the development which they gave to his philosophy. HER~VRTW. SCHNEIDER Claremont, California Propos sur Jules Lequier: Philosophe de la libert~--R~flexions sur sa vie et sur sa pens~e. Par s Callot. (Paris: l~ditions Marcel Rivi~re et Cie, 1962. Pp. 142 [1]. Biblioth6que Philosophique.) L'oeuvre de Jules Lequier est importante. Nos philosophes am~ricains Charles Hartshorne et William L. Reese en ont fait un grand ~loge dans leur Philosophers Speak of God (pp. ix, 17, 109, 118, 227-230). Dans ce nouveau livre I~mile Callot nous donne des rfiflexions, des considerations, vraiment des Propos sur Jules Lequier en occasion du centenaire de la mort de Lequier (1862). La vie de Lequier est incontestablement dramatique. N~ en 1814 en Br6tagne off il passa son enfance, Lequier subit l'influence de son pays natal, de sa m~re dont il ~tait le ills unique, et d'une 6ducation profond~ment catholique. I1 entra ~t l'l~cole Polytechnique et il en sortit peu apr~s. Mais il y connut Renouvier et c'est grace ~ Renouvier que la pens~e de Lequier nous est connue. Renouvier intercala dans ses livres des fragments de Lequier et en publia des bonnes pages sous ce titre La recherche d'une premiOre v~rit& A l'~ge de 37 ans Lequier eut un acc6s de dfimence. Puis il eut un amour exaltfi pour une jeune fille qui le refusa en mariage. Lequier mourut, noy~, ~t l'~ge de 48 ans. De sa fin il nous est impossible de savoir si elle a 6t~ un suicide ou un accident, mais Lequier garda toujours con- 264 HISTORY OF PHILOSOPHY science de son g6nie: "Je crois avoir trouv6 un myst~re merveilleux de simplicitY, de profondeur et de t~n6bres: quelque chose h quoi nul ne pense." Lequier est un philosophe de la libert& Tout philosophe part de l'id& de v~rit~, cela est n&essaire, mais la prudence exige qu'on la mette sans cesse en cause. Comme Vinet (1797-1847) a dit, "La v6rit~, sans la recherche de la verit6, n'est que la moiti~ de la v~rit& On ne salt bien que ce qu'on n'a pas su toujours; on ne croit bien qu'apr& avoir dour6; on n'est vainqueur qu'apr6s avoir &6 vaincu. Et c'est pourquoi, en cette mati~re, notre premier effort doit avoir pour objet de mettre l'homme en demeure de choisir." Lequier avait eu tr& fort le sentiment du d&erminisme universel. Mais, au moment oth la croyance ~ la n&essit6 semblait devoir triompher dans son esprit, il la rejetta brusquement "par une r&olte de l'&re entier." Selon Lequier, la premiere et fondamentale d6marche de l'esprit est une affirmation de la libert~ par la libert6 m~me. La libert~ ne cr& pas la v6rit6, mais la croyance en la libert6 est une premi6re v6rit6. Sans cette croyance, on ne peut rien chercher et rien d&ouvrir. Mais l'homme, auteur de ses actes par la libertY, ne l'est pas de sa libert& Le Dieu de la Bible est un &re infini qui rien ne peut &happer. Ainsi le probl6me entier de la pr6destination se pose ici de nouveau. Et Lequier d&ouvre une solution originale: Si Dieu... (shrink)

In lieu of an abstract, here is a brief excerpt of the content:BOOK REVIEWS 263 articles, and supplementing his anthology of Wright (Liberal Arts Press). The biographical chapter presents Wright as an attractive character among devoted friends and also as a solitary, original scientist. Wright's primary achievement was to apply utilitarian principles to Darwinian natural selection theory. Since Darwin himself made no such attempt, nor did John Stuart Mill, and since Darwin showed an evident interest in (...) class='Hi'>Wright's attempt, this represents a major contribution to evolutionary theory. On the negative side, too, Wright was incisive in his criticisms of Spencer, Mivart, Hamilton, Mansel, and Lewes. The pragmatic strains in Wright's philosophical method were incidental to his primary interest in showing that sciences are metaphysically "neutral." But his influence on Peirce and James was direct and strong, both on their cosmological and methodological doctrines. He deserves to be mentioned as the prime mover in this trinity of early pragmatism and naturalism, but since his own writings were relatively few and scattered, his historical importance rests largely on the use which Peirce and James made of his ideas and the development which they gave to his philosophy. HER~VRTW. SCHNEIDER Claremont, California Propos sur Jules Lequier: Philosophe de la libert~--R~flexions sur sa vie et sur sa pens~e. Par s Callot. (Paris: l~ditions Marcel Rivi~re et Cie, 1962. Pp. 142 [1]. Biblioth6que Philosophique.) L'oeuvre de Jules Lequier est importante. Nos philosophes am~ricains Charles Hartshorne et William L. Reese en ont fait un grand ~loge dans leur Philosophers Speak of God (pp. ix, 17, 109, 118, 227-230). Dans ce nouveau livre I~mile Callot nous donne des rfiflexions, des considerations, vraiment des Propos sur Jules Lequier en occasion du centenaire de la mort de Lequier (1862). La vie de Lequier est incontestablement dramatique. N~ en 1814 en Br6tagne off il passa son enfance, Lequier subit l'influence de son pays natal, de sa m~re dont il ~tait le ills unique, et d'une 6ducation profond~ment catholique. I1 entra ~t l'l~cole Polytechnique et il en sortit peu apr~s. Mais il y connut Renouvier et c'est grace ~ Renouvier que la pens~e de Lequier nous est connue. Renouvier intercala dans ses livres des fragments de Lequier et en publia des bonnes pages sous ce titre La recherche d'une premiOre v~rit& A l'~ge de 37 ans Lequier eut un acc6s de dfimence. Puis il eut un amour exaltfi pour une jeune fille qui le refusa en mariage. Lequier mourut, noy~, ~t l'~ge de 48 ans. De sa fin il nous est impossible de savoir si elle a 6t~ un suicide ou un accident, mais Lequier garda toujours con- 264 HISTORY OF PHILOSOPHY science de son g6nie: "Je crois avoir trouv6 un myst~re merveilleux de simplicitY, de profondeur et de t~n6bres: quelque chose h quoi nul ne pense." Lequier est un philosophe de la libert& Tout philosophe part de l'id& de v~rit~, cela est n&essaire, mais la prudence exige qu'on la mette sans cesse en cause. Comme Vinet (1797-1847) a dit, "La v6rit~, sans la recherche de la verit6, n'est que la moiti~ de la v~rit& On ne salt bien que ce qu'on n'a pas su toujours; on ne croit bien qu'apr& avoir dour6; on n'est vainqueur qu'apr6s avoir &6 vaincu. Et c'est pourquoi, en cette mati~re, notre premier effort doit avoir pour objet de mettre l'homme en demeure de choisir." Lequier avait eu tr& fort le sentiment du d&erminisme universel. Mais, au moment oth la croyance ~ la n&essit6 semblait devoir triompher dans son esprit, il la rejetta brusquement "par une r&olte de l'&re entier." Selon Lequier, la premiere et fondamentale d6marche de l'esprit est une affirmation de la libert~ par la libert6 m~me. La libert~ ne cr& pas la v6rit6, mais la croyance en la libert6 est une premi6re v6rit6. Sans cette croyance, on ne peut rien chercher et rien d&ouvrir. Mais l'homme, auteur de ses actes par la libertY, ne l'est pas de sa libert& Le Dieu de la Bible est un &re infini qui rien ne peut &happer. Ainsi le probl6me entier de la pr6destination se pose ici de nouveau. Et Lequier d&ouvre une solution originale: Si Dieu... (shrink)

A unifying theory of general anesthetic-induced unconsciousness must explain the common mechanism through which various anesthetic agents produce unconsciousness. Functional-brain-imaging data obtained from 11 volunteers during general anesthesia showed specific suppression of regional thalamic and midbrain reticular formation activity across two different commonly used volatile agents. These findings are discussed in relation to findings from sleep neurophysiology and the implications of this work for consciousness research. It is hypothesized that the essential common neurophysiologic mechanism underlying anesthetic-induced unconsciousness is, as with (...) sleep-induced unconsciousness, a hyperpolarization block of thalamocortical neurons. A model of anesthetic-induced unconsciousness is introduced to explain how the plethora of effects anesthetics have on cellular functioning ultimately all converge on a single neuroanatomic/neurophysiologic system, thus providing for a unitary physiologic theory of narcosis related to consciousness. (shrink)

Ontological and methodological constraints on a theory of cognition that would generalize across species are identified. Within these constraints, ecological arguments for animal-environment mutuality and reciprocity and the necessary specificity of structured energy distributions to environmental facts are developed as counterpoints to the classical doctrines of animal-environment dualism and intractable nonspecificity. Implications of and for a cognitive theory consistent with Gibson's programme of ecological psychology are identified and contrasted with contemporary cognitivism.

In an influential essay entitled Why abortion is wrong, Donald Marquis argues that killing actual persons is wrong because it unjustly deprives victims of their future; that the fetus has a future similar in morally relevant respects to the future lost by competent adult homicide victims, and that, as consequence, abortion is justifiable only in the same circumstances in which killing competent adult human beings is justifiable.1 The metaphysical claim implicit in the first premise, that actual persons have a future (...) of value, is ambiguous. The Future Like Ours argument (FLO) would be valid if “future of value” were used consistently to mean either “potential future of value” or “self-represented future of value”, and FLO would be sound if one or the other interpretation supported both the moral claim and the metaphysical claim, but if, as I argue, any interpretation which makes the argument valid renders it unsound, then FLO must be rejected. Its apparent strength derives from equivocation on the concept of “a future of value”. (shrink)

_Zettel, _ an en face bilingual edition, collects fragments from Wittgenstein's work between 1929 and 1948 on issues of the mind, mathematics, and language.

‘Actus non facit reum nisi mens sit rea.’ But when is a mens rea? In the last twenty years discussions of this question have been stimulated by controversial decisions in the English House of Lords in the cases of Smith, Morgan and Majewski.The case of Smith decided that a man might be guilty of murder if a reasonable person, knowing the circumstances, would have foreseen that death would result even if the agent himself did not so foresee. This appeal to (...) the ‘reasonable person’ imports what is known as the ‘objective test’ as opposed to the ‘subjective test’ of the agent's actual foresight or knowledge. The case of Morgan inclined per contra to the subjective test. (shrink)

Within the moral/social order maintained and reproduced by biomedical ethics (i.e., the “peaceable community”), suffering is a senseless accident with no value. Insofar as suffering compromises the fundamental pillar of this order, namely, autonomy, it threatens the existence of the “peaceable community”. Consequently, biomedical ethics is only able to offer those who suffer one moral or practical response: that of elimination, embodied most vividly in the increasingly approved practice of assisted-suicide. Another moral/ social order, however, the “peaceable Kingdom” or the (...) “Body of Christ”, provides an alternative understanding of the meaning, purpose, and significance of suffering, through the Roman Catholic sacrament of anointing of the sick. Recognizing the power of sickness and suffering to “dis-inscribe” bodies of their normative self-understandings, the Church responds with a set of liturgical practices which intend to respond to the dynamics of suffering, re-inscribe these bodies, and assist persons in fulfilling the vocation of “participating in Christ's suffering for the salvation of the world”. (shrink)

_Zettel, _ an en face bilingual edition, collects fragments from Wittgenstein's work between 1929 and 1948 on issues of the mind, mathematics, and language.

‘Actus non facit reum nisi mens sit rea.’ But when is a mens rea? In the last twenty years discussions of this question have been stimulated by controversial decisions in the English House of Lords in the cases of Smith, Morgan and Majewski.The case of Smith decided that a man might be guilty of murder if a reasonable person, knowing the circumstances, would have foreseen that death would result even if the agent himself did not so foresee. This appeal to (...) the ‘reasonable person’ imports what is known as the ‘objective test’ as opposed to the ‘subjective test’ of the agent's actual foresight or knowledge. The case of Morgan inclined per contra to the subjective test. (shrink)