The conception of “prospective potency” was defined by its author H.Driesch as “the sum of the possible modes of development of a given part of the embryo”. However, in the language of science the word “potency” usually means “power”, not “possibility”. Therefore this conception from the beginning possessed a certain ambiguity, that it retained up to the present. The distinction of “active” and “passive” potency, introduced by Roux, has found no general acceptance. It appeared necessary to submit the conception of (...) “potency” to a profound analysis. In the first place it is shown, that the ambiguity of this conception vanishes, if we understand by the word “potency” those fundamental properties of the embryonic material, that are responsible for its various developmental possibilities. We can distinguish among these properties the “reactive powers”, by which the embryonic material reacts to inductive stimulations, and its own “developmental tendencies”. These faculties only differ by their strength; a “reactive power” may change into a “tendency”, when its intensity increases during development; conversely, a “tendency” may change into a mere “reactive power” by a decrease of its strength. The determination of the material results from the conflict of its tendencies. The inductive actions interfere by strengthening or weakening different tendencies, and by activating new tendencies by reinforcement of the “reactive powers” of the embryonic material.La conception de „prospektive Potenz” fut définie par son auteur H.Driesch comme „l'ensemble des modes de développement possibles d'une certaine partie de l'embryon”. Cependant, le, mot „Potenz” dans le langage de la science répond plutôt à la „puissance” qu'à la „possibilité”. De là résulte, que cette conception dès son origine avait une certaine ambiguïté, qui se fait sentir jusqu'à présent. La distinction entre „potentialité active” et „potentialité passive”, proposée par Roux, n'est pas acceptée généralement. Il se trouvait nécessaire, que la conception de „Potenz” fût soumise à une. analyse profonde. D'abord il est démontré, que l'ambiguïté de cette conception disparaît, si on entend par le mot „Potenz” les propriétés fondamentales du matériel embryonnaire, qui sont à la base de ses diverses possibilités de développement. On peut distinguer parmi ces propriétés les „pouvoirs réactifs”, en vertu desquels le matériel embryonnaire répond à des inductions morphogénétiques, et les „tendances propres” du matériel. Ils ne diffèrent que par leur intensité; un „pouvoir réactif” peut se changer en „tendance” par suite d'un renforcement au cours du développement, une „tendance” peut se changer en „pouvoir réactif” par une diminution d'intensité. La détermination du matériel se réalise par une „lutte” entre les tendances. Les actions inductives influent sur cette lutte en renforçant ou en diminuant l'intensité des diverses tendances, et en activant de nouvelles tendances par le renforcement de „pouvoirs réactifs”. (shrink)

The conception of “prospective potency” was defined by its author H.Driesch as “the sum of the possible modes of development of a given part of the embryo”. However, in the language of science the word “potency” usually means “power”, not “possibility”. Therefore this conception from the beginning possessed a certain ambiguity, that it retained up to the present. The distinction of “active” and “passive” potency, introduced by Roux, has found no general acceptance. It appeared necessary to submit the conception of (...) “potency” to a profound analysis. In the first place it is shown, that the ambiguity of this conception vanishes, if we understand by the word “potency” those fundamental properties of the embryonic material, that are responsible for its various developmental possibilities. We can distinguish among these properties the “reactive powers”, by which the embryonic material reacts to inductive stimulations, and its own “developmental tendencies”. These faculties only differ by their strength; a “reactive power” may change into a “tendency”, when its intensity increases during development; conversely, a “tendency” may change into a mere “reactive power” by a decrease of its strength. The determination of the material results from the conflict of its tendencies. The inductive actions interfere by strengthening or weakening different tendencies, and by activating new tendencies by reinforcement of the “reactive powers” of the embryonic material. (shrink)

This volume consists of autobiographical by the following scholars, together with pictures and autographs: Raven I. McDavid, Jr., Henry M. Hoenigswald, John B. Carroll, William G. Moulton, Archibald A. Hill, Yakov Malkiel, Charles F. Hockett, Harold B. Allen, William Bright, Einar Haugen, George S. Lane, Frederic G. Cassidy, James B. McMillan, Winfred P. Lehmann, Fred W. Householder, and Dell Hymes. A master list of references, and an index of persons conclude the volume.

This collection of 11 studies provides a new discussion of Lucretius' History of the Human Mankind and of other topics (Lucretius' explanation of sleep, dreams and optical illusions) in relationship to other philosophical and scientific doctrines of Antiquity.

A scholarly edition of a work by David Hume. The edition presents an authoritative text, together with an introduction, commentary notes, and scholarly apparatus.

Leo Strauss and his alleged political influence regarding the Iraq War have in recent years been the subject of significant media attention, including stories in the _Wall Street Journal _and _New York Times._ _Time_ magazine even called him “one of the most influential men in American politics.” With _The Truth about Leo Strauss_, Michael and Catherine Zuckert challenged the many claims and speculations about this notoriously complex thinker. Now, with _Leo Strauss and the Problem of Political Philosophy_, they turn their (...) attention to a searching and more comprehensive interpretation of Strauss’s thought as a whole, using the many manifestations of the “problem of political philosophy” as their touchstone. For Strauss, political philosophy presented a “problem” to which there have been a variety of solutions proposed over the course of Western history. Strauss’s work, they show, revolved around recovering—and restoring—political philosophy to its original Socratic form. Since positivism and historicism represented two intellectual currents that undermined the possibility of a Socratic political philosophy, the first part of the book is devoted to Strauss’s critique of these two positions. Then, the authors explore Strauss’s interpretation of the history of philosophy and both ancient and modern canonical political philosophers, including Plato, Aristotle, Machiavelli, and Locke. Strauss’s often-unconventional readings of these philosophers, they argue, pointed to solutions to the problem of political philosophy. Finally, the authors examine Strauss’s thought in the context of the twentieth century, when his chief interlocutors were Schmitt, Husserl, Heidegger, and Nietzsche. The most penetrating and capacious treatment of the political philosophy of this complex and often misunderstood thinker, from his early years to his last works, _Leo Strauss and the Problem of Political Philosophy_ reveals Strauss’s writings as an attempt to show that the distinctive characteristics of ancient and modern thought derive from different modes of solving the problem of political philosophy and reveal why he considered the ancient solution both philosophically and politically superior. (shrink)

The basic notions of the theory of term rewriting are defined for terms that may involve function letters of infinite arity. A sufficient condition for completeness is derived, and its use demonstrated by the example of abstract clones over infinitary signatures.

The proposition that Jesus was ‘Bad, Mad or God’ is central to C.S. Lewis's popular apologetics. It is fêted by American Evangelicals, cautiously endorsed by Roman Catholics and Protestants, but often scorned by philosophers of religion. Most, mistakenly, regard Lewis's trilemma as unique. This paper examines the roots of this proposition in a two thousand year old theological and philosophical tradition (that is, aut Deus aut malus homo), grounded in the Johannine trilemma (‘unbalanced liar’, or ‘demonically possessed’, or ‘the God (...) of Israel come amongst his people’). Jesus can only be understood in the context of the Jewish religious categories he was born into; therefore, for Lewis, Jesus is who he reveals himself to be. Jesus' self-understanding reflects his identity, his triune salvific role; this is for Lewis, the transposed reality of divine Sonship. Reason and logic are paramount here, reflected in the structure of Lewis's argument. Lewis's trilemma is not so much a proof of God's existence, but a question, a dilemma, where each and every person must come to a decision. For all its perceived faults, its simplistic language, Lewis's trilemma still is a very successful piece of Christian apologetic, grounded in a serious philosophical and theological tradition. (shrink)

Linguistics falls in the gap between arts and science, on the edges of which the most fascinating discoveries and the most important problems are found. Rather than following the conventional organization of many contemporary introductions to the subject, the author of this stimulating guide begins his discussion with the oldest, 'arts' end of the subject and moves chronologically through to the newest research - the 'science' aspects. A series of short thematic chapters look in turn at such areas as the (...) prehistory of languages and their common origins, language and evolution, language in time and space, grammars and dictionaries, and phonetics. Explication of the newest discoveries pertaining to language in the brain completes the coverage of all major aspects of linguistics from a refreshing and insightful angle. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable. (shrink)

Two doctors attempt to answer this question, one a specialist in geriatric medicine, the other a psychiatrist interested in the psychiatric problems of the elderly and the old. Both, however, come to the same general conclusion: attitudes of the doctors themselves and of society must be changed. These attitudes can determine not only whether an old person lives or dies but how he lives. Old people should not have to survive in mentally suspended animation with all objectives gone but should (...) be helped to achieve the goal of an independent life until death in their own homes. The third paper in this miniature symposium is provided by David Hobman, of Age Concern, who amplifies the specialist views of the first two writers in his discussion of attitudes to the elderly in modern society. He hints, however, that these may shortly change as the elderly become a sophisticated and powerful lobby which governments are forced to heed. (shrink)