This article suggests that the increasing attention to the inadequacies of popular language and labeling, called designer diagnoses by the authors, in describing people's psychological traits and emotional distress is good news for clinicians who strive to incorporate critical thinking skills into theirday-to-day assessment decisions about clients. Specifically, the article discusses three errors in reasoning that may have led to the demise (or impending demise) of such terms as codependent, dysfunctional families, and even the broad use of the term borderline. Productive modes of thinking needed to avoid similar conceptual hazards that are certain to appear in the field in the future are also discussed.Recently, denunciations have appeared, both in the professional literature (Walters, 1990;Wetzel, 1991) and in the national press (Peterson, 1991), regarding the use of a variety of popular labels and clinical concepts because of their respective tendency to stigmatize and pathologize people, particularly women. Labels and concepts such as codependent, adult child, dysfunctional family, addiction, and even the broad use of borderline have come under attack. These, and others like them, are terms we refer to as designer diagnoses because of their trendiness, mass appeal, and especially their widespread recognition and use-even in the absence of clear meaning and definition. In addition, much like other designer labels found in clothing