From "Preparing Field Grade Leaders for Today and Tomorrow" by BG Volney J. Warner and LTC (Ret) James H. Willbanks, Ph.D., Military Review, January-February 2006:

A New Philosophy
To deal with the complexities and challenges of post-Cold War full-spectrum operations, CGSC has changed its educational philosophy. The institution has adjusted its approach from training students what to think to focus more on teaching students how to think. This approach emphasizes critical reasoning; creative thinking; complex problem solving; service and joint, interagency, and multinational competence; transformation; cultural awareness; and regional expertise.
Since the 1890s (as indicated by Dr. Gabel's article), CGSC changed its focus from "what to think to how to think." It doesn't hurt to remind CGSC of the focus, but the concept is certainly not new to CGSC...