“…Some of these examples might be explained by appeal to rule governance (e.g., Baron & Galizio, 1983; Galizio, 1979; Hayes, 1993; Skinner, 1966), and it has been asserted that excessive or inappropriate rule governance plays an important role in the development and treatment of clinical disorders (e.g., Hayes & Gifford, 1997; Hayes et al, 1999; Hayes et al, 1989; but see Harte et al, 2020, for a critical review of the literature investigating the relationship between rule governance, derived stimulus relations, and clinical disorders). However, although evoking rule governance, whether rules are defined as contingency specifying stimuli (Skinner, 1966) or function‐altering‐contingency‐specifying stimuli (Schlinger & Blakely, 1987), may describe the functions of rules, it does not explain how rules or verbal stimuli more generally come to acquire their functions.…”