Online research in philosophy

Truth, etc. is a wide-ranging study of ancient logic based upon the John Locke lectures given by the eminent philosopher Jonathan Barnes in Oxford. The book presupposes no knowledge of logic and no skill in ancient languages: all ancient texts are cited in English translation; and logical symbols and logical jargon are avoided so far as possible. Anyone interested in ancient philosophy, or in logic and its history, will find much to learn and enjoy here.

This paper deals with Popper's little-known work on deductive logic, published between 1947 and 1949. According to his theory of deductive inference, the meaning of logical signs is determined by certain rules derived from ?inferential definitions? of those signs. Although strong arguments have been presented against Popper's claims (e.g. by Curry, Kleene, Lejewski and McKinsey), his theory can be reconstructed when it is viewed primarily as an attempt to demarcate logical from non-logical constants rather than as a semantic foundation for logic. A criterion of logicality is obtained which is based on conjunction, implication and universal quantification as fundamental logical operations.

This article attempts to explore ancient Chinese philosophical thought by analyzing how pioneering Chinese thinkers made judgments and inferences, and compares it to ancient Greek philosophy. It first addresses the starting-point and the object of cognition in Chinese ancient philosophy, then analyses how early thinkers construed definition and proposition, and finally discusses how they made inferences on the basis of definition and proposition. It points out that categorization is an important methodology in ancient Chinese philosophy, and that rectification of names and the doctrine of the mean are key criteria in making judgments.

This book discusses key philosophical concepts and ideologies, including ontology, epistemology, logic, semantics, moral and political philosophy, theology and aesthetics during classical antiquity. Karsten Friis Johansen charts the history of ancient philosophy from the mythological oral tradition, Homer and early tragedy, to the giants of Plato and Aristotle through to paganism and the genesis of Christianity. A History of Ancient Philosophy also presents detailed analysis of individual ancient philosophers and interpretations and commentary on key philosophical passages.

How do we go about weighing evidence, testing hypotheses, and making inferences? The model of "inference to the best explanation" (IBE) -- that we infer the hypothesis that would, if correct, provide the best explanation of the available evidence--offers a compelling account of inferences both in science and in ordinary life. Widely cited by epistemologists and philosophers of science, IBE has nonetheless remained little more than a slogan. Now this influential work has been thoroughly revised and updated, and features a new introduction and two new chapters. Inference to the Best Explanation is an unrivaled exposition of a theory of particular interest in the fields both of epistemology and the philosophy of science.