Abstract

This is a challenging and original work on the concept of justification and its application to ethical statements. The book divides into two parts. The first part is devoted to a systematic treatment of the nature of justification. It begins with a critical rejection of the deductive model. Wellman presents plausible arguments for the existence of non-deductive evidences in ethics and shows how ethical theories can be tested by "thought-experiment" as analogous to the confirmation of scientific theories by laboratory trials. An interesting kind of inference termed "conductive reasoning" is described. It is argued that this third form of reasoning can be validly used in justifying ethical conclusions. Distinctive of conductive reasoning is its non-formal and inconclusive feature. Its validity is alleged to lie in its dependence upon the content of the argument. But by and large there is no way to judge the validity of these basic ethical arguments but by thinking them through and feeling their logical force." Wellman goes on to develop a challenge-response model for understanding the nature of justification. Justification is "to be understood essentially as a process of responding to challenges made." However, Wellman makes no attempt to consider the role of moral concepts in determining the validity of conductive reasoning and its role in the justification of ethical statements. Part II considers the dimensions of ethical justification in terms of the model of challenge and response. Seven species of challenge are described: truth, truth-value, meaningfulness, validity, validity-value, competence, and knowability. On the whole the book contains challenging views and material for the epistemology of ethics.--A. S. C.