Now it cannot be denied, I think, that this argument has the appearance of being sound, that is, both true in its premises and valid in its conclusion. But one surely ought to harbor suspicions concerning an argument which establishes the most momentous of all conclusions upon nothing more than a few propositions. In this paper I shall attempt to show that these suspicions are well-founded by pointing out that the above "proof" derives whatever force it has from an equivocation.

This book, one of the first full-length studies of the modalities to emerge from the debate to which Saul Kripke, David Lewis, Ruth Marcus, and others are contributing, is an exploration and defense of the notion of modality de re, the idea that objects have both essential and accidental properties. Plantinga develops his argument by means of the notion of possible worlds and ranges over such key problems as the nature of essence, transworld identity, negative existential propositions, and the existence (...) of unactual objects in other possible worlds. He also applies his logical theories to the elucidation of two problems in the philosophy of religion: the problem of evil and the ontological argument. (shrink)

The logician's central concern is with the validity of argument. A logical theory ought, therefore, to provide a general criterion of validity. This book sets out to find such a criterion, and to describe the philosophical basis and the formal theory of a logic in which the premises of a valid argument are relevant to its conclusion. The notion of relevance required for this theory is obtained by an analysis of the grounds for asserting a formula in a proof.

Logic is often seen as the bedrock of intellectual life. It aims to be straight-forward, true, clear. But in this provocative book of postmodern philosophy, Ermanno Bencivenga presents an extended reflection on the subversive nature of logic--logic that is not stable and certain, but deceptive and tortuous. The author uses Anselm, the Archbishop of Canterbury at the end of the eleventh century, as his case study to show how human reason can be devious. In Anselm's famous texts, his beliefs are (...) not at stake, he is sure of them--he only seeks to under-stand his faith, not to prove it. But by looking at Anselm's writings as a whole, Bencivenga argues that they undermine Anselm's own interpretation. Not only can reason be more effective than force in fighting the unorthodox, but it can also be a subtle way of undermining orthodoxy. Bencivenga demonstrates how reason plays different roles at the different levels of Anselm's project. For its authoritarian subject, reason imposes a limit on its rebellious character. For its subversive subject, reason opens up an infinite arena for experimentation whose end will never be reached. Ultimately, Logic and Other Nonsense asks hard questions about the nature of philosophy in Anselm's world, as well as our own. (shrink)

One of the cornerstone books of Western philosophy, Critique of Pure Reason is Kant's seminal treatise, where he seeks to define the nature of reason itself and builds his own unique system of philosophical thought with an approach known as transcendental idealism. He argues that human knowledge is limited by the capacity for perception and attempts a logical designation of two varieties of knowledge: a posteriori, the knowledge acquired through experience; and a priori, knowledge not derived through experience. This accurate (...) translation by J. M. D. Meiklejohn offers a simple and direct rendering of Kant's work that is suitable for readers at all levels. (shrink)

Introduction Alexius Meinong and his circle of students and collaborators at the Phi- losophisches Institut der Universitat Graz formulated the basic ...