Garfield presents clarifying approaches to knowledge generation that should help cut through the fog of ideological controversy. Unfortunately, some encyclopedic attempts in this volume do not live up to Garfield’s standards. For instance, meta-analytic conclusions are asserted about the relative merits of pharmacotherapy and psychotherapy, ignoring critiques and reasonable caveats (e.g., direct comparisons of different treatments within the same randomized, controlled independently assessed study are conspicuously rare, and the cited meta-analyses compare effect sizes derived from different studies, subject samples, measures, treatment lengths, etc.). One chapter makes the assertion that "any genetic factors are general to all of the anxiety disorders" but does not cite or discuss studies finding that some anxiety disorders breed true. Such spottiness in a reference work substantiates Garfield’s concerns.