To the Editor.— Hoffman's1article Pro– vides rich food for thought for those interested in mind-brain function. The "popcorn" analogy to neuronal energy minima states is a clear and easy way to explain how "macro" knowledge structures are processed differently in the two psychopathologic states. In an intriguing way, the Hopfield model assists in one's contemplating the basis for some of the "primary processes" that psychoanalysis has long held to be fundamental to mental life. For example, Hoffman's description of "content addressable" memory fits with what Gill2would consider to be the primary process of condensation with substitute formation. Hoffman points out that "if several stored gestalts have many features in common then the system will often flow into an end state that is a composite of these gestalts." Not since Jung3struggled with the "feeling-toned complex" via the wordassociation test have investigators satisfactorily explained either the