If you don't have a college degree, you're at greater risk of developing memory problems or even Alzheimer's. Education plays a key role in lifelong memory performance and risk for dementia, and it's well documented that those with a college degree possess a cognitive advantage over their less educated counterparts in middle and old age.
Education Does Not Protect Against Age-Related Memory Loss, Say Researchers (Jan. 10, 2007) — Adults over 70 with higher levels of education forgot words at a greater rate than those with less education,
Brain Exercises May Slow Cognitive Decline Initially, but Speed Up Dementia Later (Sep. 1, 2010)
Education Helps Against Dementia, Swedish Study Finds (June 1, 2010) — Researchers have discovered that education not only delays the early symptoms of dementia, but can also slow down the development of the disease
And now you know.... Sorry Paul Harvey