This article is mostly anecdotal and contends that fluid and crystallized memory and function are on an irreversible, one-way trajectory. Research is inconclusive with respect to this; the research is in its infancy and results are in conflict. As with physiological health, mental function is multi-factorial. This article makes sweeping generalizations and has a defeatist tone. Read Benner again, it was required reading when I was in school, and then perhaps do some self-reflection on your perceived value to nursing. The speed of one's fluid thinking, vs. the high quality of crystallized thinking - where on the continuum is nursing care of greatest value? I will opt for a few nanoseconds of slower speed, combined with expert-level clinical reasoning borne out of years of experience.