This lavishly illustrated book highlights the conservation importance of congregatory animals species--those which gather in vast groups. It also focuses on the irreplaceability of the congregation sites which are able to support such large gatherings of animals, fish, or birds.

The evolution of internation relationships is studied by means of a mathematical model based on a popular rule of triadic interaction: the friend of my friend is my friend, the friend of my enemy is my enemy, the enemy of my enemy is my friend, the enemy of my friend is my enemy. The rule is shown to lead to the formation and preservation of unipolar and bipolar configurations of nations, with the strengths of relationships, both friendly and conflictual, intensifying (...) through time. These results confirm speculations originally made in static, graph theoretic studies of the balancing of relationships within individuals, small groups and systems of nations. (shrink)

Rigorous formal proof is one of the key techniques in the natural sciences, engineering, and of course also in the formal sciences. Progress in automated reasoning increasingly enables computer systems to support, and even teach, users to conduct formal a.

§ 1. The purpose of this paper is to inquire what distinction can or should be drawn between logic on the one hand and on the other psychology, so far as psychology concerns itself specifically with the problem of knowledge. The suggestions I have to make are very provisional, and are based mainly on a criticism of the late Mr. Bradley's views of the nature and scope of logic and psychology. For this reason I have for my title adapted from (...) Bradley's article on “Association and Thought” a famous phrase which seems to me to illustrate fairly well the meeting-point of these two sciences in his thinking. At the same time this very criticism is itself chiefly founded upon philosophical considerations with which Bradley at least as much as any other writer has taught me to sympathize. In short, I assume some sort of Absolute Idealism; and my excuse must be the further assumption—which I hope the reader will more readily tolerate— that the proper criticism of any theory is that which it can be shown to pass upon itself in the course of its own development. (shrink)

An alleged moral right to informational privacy assumes that we should have control over information about ourselves. What is the philosophical justification for this control? I think that one prevalent answer to this question—an answer that has to do with the justification of negative rights generally—will not do.

W.K. Clifford’s famous 1876 essay The Ethics of Belief contains one of the most memorable lines in the history of philosophy: "it is wrong always, everywhere, and for anyone, to believe anything upon insufficient evidence." The challenge to religious belief stemming from this moralized version of evidentialism is still widely discussed today.

Mr Olding's recent attack on my exposition of the argument from design gives me an opportunity to defend the central theses of my original article. My article pointed out that there were arguments from design of two types—those which take as their premisses regularities of copresence and those which take as their premisses regularities of succession. I sought to defend an argument of the second type. One merit of such an argument is that there is no doubt about the truth (...) of its premisses. Almost all objects in the world behave in a highly regular way describable by scientific laws. Further, any scientific explanation of such a regularity must invoke some more general regularity. The most general regularities of all are, as such, scientifically inexplicable. The question arises whether there is a possible explanation of another kind which can be provided for them, and whether their occurrence gives any or much support to that explanation. I urged that we do explain some phenomena by explanation of an entirely different kind from the scientific. We explain states of affairs by the action of agents who bring them about intentionally of their own choice. Regularities of succession, as well as other phenomena may be explained in this way. Explanation of this kind I will term intentional explanation. Intentional explanation of some phenomenon E consists in adducing an agent A who brought E about of his own choice and a further end G which, he believed, would be forwarded by the production of E. (shrink)

This treatise on aesthetics criticizes various psychological theories of art, offers new theories and interpretations, and draws important inferences concerning ...

On what grounds will the rational man become a Christian? It is often assumed by many, especially non-Christians, that he will become a Christian if and only if he judges that the evidence available to him shows that it is more likely than not that the Christian theological system is true, that, in mathematical terms, on the evidence available to him, the probability of its truth is greater than half. It is the purpose of this paper to investigate whether or (...) not this is a necessary and sufficient condition for the rational man to adopt Christianity. (shrink)

This book aims to provide an introduction to Aristotle's Politics, highlighting the major themes and arguments offered in the scholar's work. It begins with a discussion on what Aristotle perceives as human good, which he had described as the ethical purpose of political science, and how he views the political community, or the polis, as a community of persons formed with a view to some good purpose and a supreme entity in the sense that it is not just one aspect (...) of city-state society but is the whole of that society. The book also discusses Aristotle's arguments against the abolition of the household for the ruling class and the communism of families and property, which Plato advocates, and highlights certain inconsistencies and vulnerabilities in his arguments supporting natural slavery and on how the husband should rule over his wife and children. The book presents Aristotle's account of the relative merits of six different types of constitution and his views on the best possible constitution that will help in the realization of the polis' true purpose of achieving the good life. It ends with a discussion on Aristotle's view of political science in relation to the protection of particular constitutions against constitutional change and political disorder. (shrink)

For a theist, a man's duty is to conform to the announced will of God. Yet a theist who makes this claim about duty is faced with a traditional dilemma first stated in Plato's Euthyphro—are actions which are obligatory, obligatory because God makes them so, or does God urge us to do them because they are obligatory anyway? To take the first horn of this dilemma is to claim that God can of his free choice make any action obligatory or (...) non-obligatory. The critic claims that the theist cannot take this horn, for God cannot make bad actions good. (shrink)

This early work by Robin G. Collingwood was originally published in 1939 and we are now republishing it with a brand new introductory biography. 'An Autobiography' is the story of Collingwood's personal and academic life. Robin George Collingwood was born on 22nd February 1889, in Cartmel, England. He was the son of author, artist, and academic, W. G. Collingwood. He was greatly influenced by the Italian Idealists Croce, Gentile, and Guido de Ruggiero. Another important influence was his father, a professor (...) of fine art and a student of Ruskin. He published many works of philosophy, such as Speculum Mentis (1924), An Essay on Philosophic Method (1933), and An Essay on Metaphysics (1940). (shrink)

If I say “we are now living in England” or “grass is green in summer’ or ‘the cat is on the mat’ what I say will normally be true or false—the statements are true if they correctly report how things are, or correspond to the facts; and if they do not do these things, they are false. Such a statement will only fail to have a truth-value if its referring expressions fail to refer ; or if the statement lies on (...) the border between truth and falsity so that it is as true to say that the statement is true as to say that it is false. Are moral judgments normally true or false in the way in which the above statements are true or false? I will term the view that they are objectivism and the view that they are not subjectivism. The objectivist maintains that it is as much a fact about an action that it is right or wrong as that it causes pain or takes a long time to perform. The subjectivist maintains that saying than an action is right or wrong is not stating a fact about it but merely expressing approval of it or commending it or doing some such similar thing. I wish in this paper, first, to show that all arguments for subjectivism manifestly fail, and secondly to produce a strong argument for objectivism. But, to start with, some preliminaries. (shrink)

Informed choice is increasingly recognised as important in supporting patient autonomy and ensuring that people are neither deceived nor coerced. In cancer screening the emphasis has shifted away from just promoting the benefits of screening to providing comprehensive information to enable people to make an informed choice. Cancer screening programmes in the UK now have policies in place which state that it is their responsibility to ensure that individuals are making an individual informed choice. There is a need to evaluate (...) whether such policies mean that those people invited for screening are making informed choices, and how comprehensive information affects other variables such as uptake, cost effectiveness, and satisfaction. At the present time, there is no validated measure of informed choice in cancer screening. Such a measure could be used to evaluate the effectiveness of interventions to increase informed choice and levels of informed choice in a population invited for screening. It could encourage health professionals to be accountable. Factors important when measuring informed choice in cancer screening include an individual’s understanding of the limitations of screening, the ability to make an autonomous choice, and the difference between choice and behaviour. (shrink)

ARGUMENTS FROM DESIGN TO THE EXISTENCE OF GOD MAY TAKE AS THEIR PREMISS EITHER THE EXISTENCE OF REGULARITIES OF COPRESENCE OR THE EXISTENCE OF REGULARITIES OF SUCCESSION. THERE ARE NO VALID FORMAL OBJECTIONS TO A CAREFULLY ARTICULATED ARGUMENT OF THE LATTER TYPE. AGAINST SUCH AN ARGUMENT NONE OF THE OBJECTIONS IN HUME’S "DIALOGUES" HAVE ANY WORTH. THE ARGUMENT MAY HOWEVER GIVE ONLY A SMALL DEGREE OF SUPPORT TO ITS CONCLUSION.

The following statement is a report of the Committee on Philosophy in Education of the American Philosophical Association and was approved by the Association's Board of Officers in December, 1958. The Committee was composed of the following: C. W. Hendel, Chairman, H. G. Alexander, R. M. Chisholm, Max Fisch, Lucius Garvin, Douglas Morgan, A. E. Murphy, Charner Perry and R. G. Turnbull. Primary responsibility for the preparation of this report belonged to a subcommittee composed of R. G. Turnbull, Chairman, and (...) C. W. Hendel. (shrink)

In this article we show that it is possible to completely classify the degrees of r.e. bases of r.e. vector spaces in terms of weak truth table degrees. The ideas extend to classify the degrees of complements and splittings. Several ramifications of the classification are discussed, together with an analysis of the structure of the degrees of pairs of r.e. summands of r.e. spaces.

In Ethics and the Limits of Philosophy, Bernard Williams is rather severe on what he thinks of as an ethics of obligation. He has in mind by this Kant and W. D. Ross. For many, obligation seems the very core of ethics and the moral realm, and lives more generally are seen through the prism of this notion. This, according to Williams, flattens out our lives and moral experience and fails to take into account things which are obviously important to (...) our lives. Once we take these things into account, what do we do if they come into conflict with some of our moral obligations, as Williams, in his earlier writings on moral luck, thought to be the case. I want here to explore some of these ideas, in a way that I think harmonious with Williams's general bent though not one that I intend as in any way detailed exegesis of Williams's work. (shrink)