This course addresses advanced issues that arise if and when scholars embrace notions of sets and their relations. While it is a course about set-theoretic methods writ large, most of the time, we will discuss issues specific to QCA. We will try and address all the following topics but, depending on participants’ needs and interests, we can put more emphasis on some: set-theoretic multi-method research; robustness and sensitivity; set-theoretic theory evaluation; enhanced Standard Analysis;   data structures and set-theoretic methods, including temporal ordering and two-step QCA; model ambiguity; multi-value QCA.