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)

Court-ordered caesarean sections against the explicit wishes of the pregnant woman have been criticised as violations of the woman's fundamental right to autonomy and to the inviolability of the person--particularly, so it is argued, because the fetus in utero is not yet a person. This paper examines the logic of this position and argues that once the fetus has passed a certain stage of neurological development it is a person, and that then the whole issue becomes one of balancing of (...) rights: the right-to-life of the fetal person against the right to autonomy and inviolability of the woman; and that the fetal right usually wins. (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)

Sir Karl Popper is well known for explicating science in falsificationist terms, for which his degree of corroboration formalism, C(h,e,b), has become little more than a symbol. For example, de Queiroz and Poe in this issue argue that C(h,e,b) reduces to a single relative (conditional) probability, p(e,hb), the likelihood of evidence e, given both hypothesis h and background knowledge b, and in reaching that conclusion, without stating or expressing it, they render Popper a verificationist. The contradiction they impose is easily (...) explained--de Queiroz and Poe fail to take account of the fact that Popper derived C(h,e,b) from absolute (logical) probability and severity of test, S(e,h,b), where critical evidence, p(e,b), is fundamental. Thus, de Queiroz and Poe's conjecture that p(e,hb) = C(h,e,b) is refuted. Falsificationism, not verificationism, remains a fair description of the parsimony method of inference used in phylogenetic systematics, not withstanding de Queiroz and Poe's mistaken understanding that "statistical" probability justifies that method. Although de Queiroz and Poe assert that maximum likelihood has the power "to explain data", they do not successfully demonstrate how causal explanation is achieved or what it is that is being explained. This is not surprising, bearing in mind that what is assumed about character evolution in the accompanying likelihood model M cannot then be explained by the results of a maximum likelihood analysis. (shrink)

In this note we present a three-valued intensional logic, which is an extension of both Montague's intensional logic and ukasiewicz three-valued logic. Our system is obtained by adapting Gallin's version of intensional logic (see Gallin, D., Intensional and Higher-order Modal Logic). Here we give only the necessary modifications to the latter. An acquaintance with Gallin's work is pressuposed.

IGM form a unified group and we denote their consensus by the sign Z; in the absence of I we signify the consensus of GM with £. It will be seen that in the earlier part of Book I this family is reduced to M. Here one may sometimes call on the help of Harleianus 2564 saec. xv, which we call h; this manuscript, though overlaid with the vulgate text, shows a number of striking readings which reveal a source closely (...) related to G. At the end of the poem we lack the guidance of A, which, though not free from interpolations, is by far the most sincere witness; here the testimony of Cantabrigiensis Pembrokianus 280 saec. xii, which we call F and which in the earlier books shows more fidelity to the A-tradition than any other manuscript, is sometimes useful, though it cannot be relied on without grave reservations. Editors usually quote Monacensis 8122 as if it were a primary witness; it is nothing of the sort, but rather a much corrupted and interpolated offshoot of the A-tradition diluted by some contamination from Z. We use ω to indicate the mass of the vulgar manuscripts and ς to indicate some of them. (shrink)

The Thebaid is not easy reading, and copyists have not helped to make it easier. There are many pitfalls in the language of Statius, and words cannot be taken always at their face value. I have erred myself and suffered. It may be of interest to give a few instances.

Upshot: In our response we focus on five questions that point to important common themes in the commentaries: why start in wicked problems, what kind of system is a scientific perspective, what is the nature of second-order research processes, what does this mean for understanding interdisciplinary work, and how may polyocular research help make real-world decisions.

Upshot: In our response we focus on how different types of systems are related from a constructivist perspective, and specifically on the relation between communicational social systems and embodied agency.