This thinker divided the sciences into “Science of Discovery,” “Science of Review,” and “Practical Science.” A law named for this thinker states that P must be true if there is a proposition Q such that “P then Q” implies P. This thinker developed theories regarding the importance of continuity and “absolute chance,” respectively called synechism and tychism. This thinker listed “quality,” “relation,” and “representation” as “firstness,” “secondness,” and “thirdness” in “On a New List of Categories.” Every sign is either an icon, index, or symbol in this thinker’s theory of semiotics. This thinker included the method of tenacity among the methods of “settling opinion” in “The Fixation of Belief.” For 10 points, name this “father of pragmatism” who wrote (-5[1])“How to Make Our Ideas Clear.” (10[1])■END■ (0[1])