Abstract
The work under consideration gives a thorough analysis of different kinds of skepticism and a very laborious chain of reasoning leading to skepticism's refutation. Many important problems, such as principles of justification and explanation, tests for economy and simplicity, and so on, appear as side issues of the main stream of reasoning. This stream is called by the author the "master argument." Its objective is to refute the form of skepticism which asserts that it is unreasonable for human beings "to believe any claim entailing there are particular unperceived physical objects, past events, future events, or mental phenomena of others." The most important products of this "long, tortuous route to the conclusion" are--in the author's eyes--a particular theory of empirical justification, and a refutation of the "skepticism about induction."