This document discusses issues with cultural-historical activity theory (CHAT) as a framework for studying writing and professional communication. It notes that while CHAT provides concepts like mediation, internalization, proximal development, activity systems, and contradictions, rhetoric and writing studies fields historically lacked a unified paradigm, set of methodologies, and research techniques. The document also references debates around applying sociocognitive approaches to professional communication and outlines some problems with CHAT's theoretical framework, key phenomena, and history of adaptations over time.