Radio techniques were the nrst to lead astronomy away from the quiescent and limited Universe revealed by traditional observations at optical wave- lengths. In the earliest days of radio astronomy, a handful of radio physicists and engineers made one startling discovery after another as they opened up the radio sky. With this collection of classic papers and the extensive intro- ductory material, the reader can experience these exciting discoveries, as well as understand the developing techniques and follow the motivations which prompted the various lines of inquiry. For instance he or she...

One of the earliest and most influential treatises on the subject of this volume is Aristotle's Categories. Aristotle's title is a form of the Greek verb for speaking against or submitting an accusation in a legal proceeding. By the time of Aristotle, it also meant: to signify or to predicate. Surprisingly, the "predicates" Aristotle talks about include not only bits of language, but also such nonlinguistic items as the color white in a body and the knowledge of grammar in a man's soul. (Categories I/ii) Equally surprising are such details as Aristotle's use of the terms 'homonymy' and...

Prefatory Explanation It must be remarked at once that I am 'editor' of this volume only in that I had the honor of presiding at the symposium on Spinoza and the Sciences at which a number of these papers were presented (exceptions are those by Hans Jonas, Richard Popkin, Joe VanZandt and our four European contributors), in that I have given some editorial advice on details of some of the papers, including translations, and finally, in that my name appears on the cover. The choice of speakers, and of addi- tional contributors, is entirely due to Robert Cohen and Debra Nails; and nearly all...

Lectures of a Course held at the Joint Research Centre, Ispra, May 7-11, 1984

Several years ago I came across a marvelous little paper in which Hector-Neri Castaneda shows that standard versions of act utilitarian- l ism are formally incoherent. I was intrigued by his argument. It had long seemed to me that I had a firm grasp on act utilitarianism. Indeed, it had often seemed to me that it was the clearest and most attractive of normative theories. Yet here was a simple and relatively uncontrover- sial argument that showed, with only some trivial assumptions, that the doctrine is virtually unintelligible. The gist of Castaneda's argument is this: suppose we understand...

This anthology of original essays has been nearly .two and one-half years in the making, and reflects the generous effort of many persons. To begin with, we thank the contributors to the volume, who not only cooperated with regards to their own works, but who also provided valuable advice concerning the over-all volume. One of the contributors was outstanding in his assistance and warrants special mention: we thank Professor Michel Meyer, for his encouragement, counsel, and dedication to see this project to comple tion. We would also like to thank Professor Jaakko Hintikka for his...

Broadly speaking, this is a book about truth and the criteria thereof. Thus it is, in a sense, a book about justification and rationality. But it does not purport to be about the notion of justification or the notion of rationality. For the assumption that there is just one notion of justification, or just one notion of rationality, is, as the book explains, very misleading. Justification and rationality come in various kinds. And to that extent, at least, we should recognize a variety of notions of justification and rationality. This, at any rate, is one of the morals of Chapter VI. This...