A recent addition to the growing corpus of Frege literature is Reinhardt Grossmann's metaphysical study of Frege's philosophical theories. Grossmann approaches Frege as a metaphysician whose philosophical concern centers around four main problems: the nature of logic, the analysis of various kinds of propositions, identity and truth. He has a genetic view of Frege's answers to these problems, and this is reflected in the arrangement and content of the chapters. In chapter I, Grossmann considers Frege's introduction of these problems in (...) the Begriffsschrift and his initial attempt at solutions in terms of the distinctions between thinking and judging, sentence and content, concept and object, function and argument. Grossmann here diagnoses Frege's alleged failure to recognize states of affairs as the fundamental shortcoming of these early views. (shrink)

St. Thomas is usually thought to have rejected abortion and euthanasia as murder (viz, the statement of The Sacred Congregation for the Doctrine of the Faith "On Procured Abortion"). By going back to Aquinas' own words I show that this is mistaken: that he explicitly states abortion prior to a certain point of fetal development to be non-murderous and that his position, when consistently developed, allows for euthanasia under analogous circumstances. These claims are argued by presenting an analytical expose of (...) Aquinas’ metaphysics of man and of human ontogenesis. The implications of this for current bioethical concerns are sketched briefly. (shrink)

St. Thomas is usually thought to have rejected abortion and euthanasia as murder (viz, the statement of The Sacred Congregation for the Doctrine of the Faith "On Procured Abortion"). By going back to Aquinas' own words I show that this is mistaken: that he explicitly states abortion prior to a certain point of fetal development to be non-murderous and that his position, when consistently developed, allows for euthanasia under analogous circumstances. These claims are argued by presenting an analytical expose of (...) Aquinas’ metaphysics of man and of human ontogenesis. The implications of this for current bioethical concerns are sketched briefly. (shrink)

Frege: Philosophy of Language has been heralded as Michael Dummett's long-awaited magnum opus on Frege. Actually, however, as the author himself tells us, it is only the first of a two-volume series devoted to Frege's philosophy of language and his philosophy of mathematics respectively.The book itself has been long in preparation, the writing of it having been interrupted for several years. This fact could not help but leave some marks on the organization and content of the various chapters. Still, all (...) in all, it presents a remarkably interesting and provocative whole. It is topical, rather than purely genetic in approach, dealing with various fundamental features of Frege's philosophy of language in some 19 chapters; e.g., with his sense-reference distinction, his theory of assertions, his conception of the nature and place of truth-values, propositions and thoughts, his views on quantification and identity, the nature of proper names, his polemic about explicit vs. implicit definitions, his theory of incomplete expressions, and the like. However, the historical needs of the reader are also well-served. (shrink)

Whittaker, following Siebeck, pointed out the important role Plotinus assigns to the functions of imagination in psychic life. Imagination is the terminus ad quern of all properly human conscious experience; it is that faculty of man without which there can be no conscious experience. The sensitive soul is an imaginative soul below which there is Nature, or vegetative soul, which acts without being conscious. When the functions of reason are added to sensation to produce a rational human being, there is (...) conscious discursive thought as well as conscious sensation; and since the sensitive soul cannot be responsible for the imaging of rational concepts, Plotinus asserts the existence of a conceptual imagination. (shrink)

This paper is based on a semantic foundation of quantum logic which makes use of dialog-games. In the first part of the paper the dialogic method is introduced and under the conditions of quantum mechanical measurements the rules of a dialog-game about quantum mechanical propositions are established. In the second part of the paper the quantum mechanical dialog-game is replaced by a calculus of quantum logic. As the main part of the paper we show that the calculus of quantum logic (...) is complete and consistent with respect to the dialogic semantics. Since the dialoggame does not involve the 'excluded middle' the calculus represents a calculus of effective (intuitionistic) quantum logic. In a forthcoming paper it is shown that this calculus is equivalent to a calculus of sequents and more interestingly to a calculus of propositions. With the addition of the 'excluded middle' the latter calculus is a model for the lattice of subspaces of a Hilbert space. (shrink)

The article argues against the commonly held 'green glasses' interpretation of Kant's "a priori", where any one's familiar experience must be seen as integrated by space and time and the categories. Such an interpretation does not answer Hume's problem, Which was whether any necessary connection could be found in experience. For the connections of familiar experience are customary and contingent. Passages from Kant are cited to show that he meant by 'objective experience', not familiar experience, but that body of scientific (...) observation which has been connected according to law. The "a priori" turns out to be what the scientist finds necessary for the possibility of such a connected experience. (shrink)

In this article, the author focuses on the allocation of decision-making authority between parents and physicians. She argues that parents should have substantial room to decide whether genetic testing is good for their child and that they may appropriately consider interests in addition to those of their child in making such choices. A physician, however, may refuse to act pursuant to parental views about testing, when in the physician's view, the parents' choices would pose a risk of significant harm to (...) the child. The balance of control between parents and physicians is illustrated by discussion of a series of case vignettes. Refusal to perform requested testing is most often warranted for testing for carrier status and for genetic predisposition to late onset disease. The author concludes her analysis by discussing why it is appropriate to give increasing deference to the views of the child as the child grows older. (shrink)

In a preceding paper [1] it was shown that quantum logic, given by the tableaux-calculus Teff, is complete and consistent with respect to the dialogic foundation of logics. Since in formal dialogs the special property of the 'value-definiteness' of propositions is not postulated, the calculus $T_{eff}$ represents a calculus of effective (intuitionistic) quantum logic. Beginning with the tableaux-calculus the equivalence of $T_{eff}$ to calculi which use more familiar figures such as sequents and implications can be investigated. In this paper we (...) present a sequents-calculus of Gentzen-type and a propositional calculus of Brouwer-type which are shown to be equivalent to $T_{eff}$ . The effective propositional calculus provides an interpretation for a lattice structure, called quasi-implicative lattice. If, in addition, the value-definiteness of quantum mechanical propositions is postulated, a propositional calculus is obtained which provides an interpretation for a quasi-modular orthocomplemented lattice which, as is well-known, has as a model the lattice of subspaces of a Hilbert space. (shrink)