I recently renewed my license and the renewal form asked the following question: Do you have Alzheimer's, dementia or memory loss?
Good thing you don't live in Hawaii. 
If I lived in Hawaii and was asked this question by a clerk at the DMV, I could always lie. If I was caught lying, I would simply claim that I couldn't remember if I had those issues.
It surprised me to discover that hearing loss does not affect one's ability to get a driver's license in Oregon.
Don't most octogenarians have some memory loss? 80+ years of building new memories makes for a humongous number of memories to process. What is especially annoying is childhood and young adulthood memories are easier to access than some of the moment ones, like where I put my car keys. Remembering people's names has always been an issue for me, but I can remember most of the addresses of most places I lived at from about 8 years of age on. -selective amnesia?
Fred Trump Sr. was diagnosed with Alzheimer's disease in October 1991, at the age of 86. Most late-onset cases involve risk genes (like APOE4). APOE4 is the strongest risk factor gene for Alzheimer's disease -- hmmm. Trump should get tested for the APOE4 gene. Not that he would reveal that he had it.
