The academic research of cognitive linguists George Lakoff and Mark Johnson and Faulkner's experience with "Metaphors" support his hypothesis that cognitive processes are mostly metaphoric, and unconscious. Hence, conscious desires with functional qualities have parallel metaphors that sustain them. Twenty years later, Faulkner would write about this phenomenon in a two-part article entitled "Outcomes, Decisions & 'Levels' of Meaning." In the years that followed, Faulkner continued to develop additional models, such as "Physician Decision Strategies" in 1986, "Futures Trading" in 1987, and finally "System Structure" (a simultaneous strategies model) in 1990.