Zmíněná studie se dá dohledat na Googlu (třetí odkaz v pdf), případně klasický ruský lib gen."Lower incidence of dementia in subjects with higher education has been reported by at least 8 cohorts, in France, Sweden, Finland, China and the United States. Similar associations emerged in a pooled analysis of 4 European population-based prospective studies of individuals 65 years and older. There is also evidence for the role of education in age-related cognitive decline, with several studies of normal aging reporting slower cognitive and functional decline in individuals with higher educational attainment. These studies suggest that the same education-related factors that delay the onset of dementia also allow individuals to cope more effectively with brain changes encountered in normal aging. In an ethnically diverse cohort of nondemented elders in New York City, increased literacy was also associated with slower decline in memory, executive function, and language skills." Citováno ze stránky 113 (vpravo) odkazovaného zdroje.A asi nemusím poukazovat na to, že protiargumentujete vlastní interpretací a spekulacemi. Prosím, neberte to ve zlém, ale jako exaktní argument by to neobstálo, byť samozřejmě můžete mít pravdu.