  Probably Peirce’s best-known works are the first two articles in a series of six that originally were collectively entitled Illustrations of the Logic of Science and published in Popular Science Monthly from November 1877 through August 1878. The first is entitled “The Fixation of Belief” and the second is entitled “How to Make Our Ideas Clear.” In the first of these papers Peirce defended, in a manner consistent with not accepting naive realism, the superiority of the scientific method over other methods of overcoming doubt and “fixing belief.” In the second of these papers Peirce defended a “pragmatic” notion of clear concepts.