This definitive survey of the hottest issues in inductive logic sets the stage for further classroom discussion.

Mr. Wellman’s highly original contribution to the relatively new field of justification in ethics consists of characterizing the different ways in which ethical statements can be challenged and showing how each sort of challenge can be met by an appropriate response, enabling reasonable men to appropriately discuss or reflect on ethical issues. In developing his unique, systematic, methodology of ethics, Mr. Wellman has, first, rigorously reviewed and refuted the main arguments for the view of the nature of all reasoning as (...) deductive and, second, convincingly presented arguments for the existence of nondeductive evidences in ethics. Mr. Wellman’s broad definition of reasoning and his rejection of the identification of justification with reasoning reveals new dimensions of justification which will have wide implications in other areas of human speculation. (shrink)

Preface. I. BASICS OF LOGIC. Introduction. The Structure of Simple Statements. The Structure of Complex Statements. Simple and Complex Properties. Validity. 2. PROBABILITY AND INDUCTIVE LOGIC. Introduction. Arguments. Logic. Inductive versus Deductive Logic. Epistemic Probability. Probability and the Problems of Inductive Logic. 3. THE TRADITIONAL PROBLEM OF INDUCTION. Introduction. Hume’s Argument. The Inductive Justification of Induction. The Pragmatic Justification of Induction. Summary. IV. THE GOODMAN PARADOX AND THE NEW RIDDLE OF INDUCTION. Introduction. Regularities and Projection. The Goodman Paradox. The Goodman (...) Paradox, Regularity, and the Principle of the Uniformity of Nature. Summary. 5. MILL’S METHODS OF EXPERIMENTAL INQUIRY AND THE NATURE OF CAUSALITY. Introduction. Causality and Necessary and Sufficient Conditions. Mill’s Methods. The Direct Method of Agreement. The Inverse Method of Agreement. The Method of Difference. The Combined Methods. The Application of Mill’s Methods. Sufficient Conditions and Functional Relationships. Lawlike and Accidental Conditions. 6. THE PROBABILITY CALCULUS. Introduction. Probability, Arguments, Statements, and Properties. Disjunction and Negation Rules. Conjunction Rules and Conditional Probability. Expected Value of a Gamble. Bayes’ Theorem. Probability and Causality. 7. KINDS OF PROBABILITY. Introduction. Rational Degree of Belief. Utility. Ramsey. Relative Frequency. Chance. 8. PROBABILITY AND SCIENTIFIC INDUCTIVE LOGIC. Introduction. Hypothesis and Deduction. Quantity and Variety of Evidence. Total Evidence. Convergence to the Truth. ANSWERS TO SELECTED EXERCISES. INDEX. (shrink)

The Rationalist Tradition of evidence scholarship1 The history of the law of evidence is the history of a series of largely isolated responses to particular ...

Ancient sceptics, unlike their modern counterparts, claim to live their scepticism. Nowadays scepticism, whether epistemological, moral, or of any other variety, is seen as a purely theoretical position, with no direct bearing on the actual living of one’s life; this is because philosophical theories and everyday attitudes are taken to be in some way “insulated” from one another. Serious questions may be raised about the character of this alleged “insulation,” but these are not my present concern; the fact is that (...) no such split between “the philosophical” and “the ordinary” was entertained in the ancient world. It follows that the viability of scepticism as a way of life is a crucial issue for ancient sceptics. It is no accident that one of the most enduring objections to ancient scepticism is to the effect that the sceptical attitude—that is, the posture of universal suspension of judgement—is incompatible with any kind of normal human action; this was known in antiquity as the charge of apraxia, “inaction.” The sceptics for their part, were just as persistent in arguing that suspension of judgement had no such damaging consequences. In as much as the assessment of actual or imaginable types of human life is the province of ethics, I take this debate between ancient sceptics and their detractors to be, in a broad sense, an ethical debate. (shrink)

This article evaluates whether Rescher's rules for plausible reasoning or other rules used in artificial intelligence for "confidence factors" can be extended to deal with arguments where the linked-convergent distinction is important.

Although the so-called "pragmatic" test of truth--the idea that the truth of a statement is a function of its predictive value--is usually credited to william james, we possess a version of this truth-test from the third-century b c in the philosophy of carneades of cyrene, the head of the skeptical "middle academy". like james, carneades denied the existence of absolute truth, in the sense of a truth which no further experience could change, offering instead a criterion of probability, the highest (...) form of which is "the probable and tested". (shrink)

Mr. Wellman’s highly original contribution to the relatively new field of justification in ethics consists of characterizing the different ways in which ethical statements can be challenged and showing how each sort of challenge can be met by an appropriate response, enabling reasonable men to appropriately discuss or reflect on ethical issues. In developing his unique, systematic, methodology of ethics, Mr. Wellman has, first, rigorously reviewed and refuted the main arguments for the view of the nature of all reasoning as (...) deductive and, second, convincingly presented arguments for the existence of nondeductive evidences in ethics. Mr. Wellman’s broad definition of reasoning and his rejection of the identification of justification with reasoning reveals new dimensions of justification which will have wide implications in other areas of human speculation. (shrink)

The aim of the paper is to advance the theory of argument or inference schemes by suggesting answers to questions raised by Walton's Argumentation Schemes for Presumptive Reasoning (1996), specifically on: the relation between argument and reasoning; distinguishing deductive from presumptive schemes, the origin of schemes and the probative force of their use; and the motivation and justification for their associated critical questions.