Agree. Also, cognitive decline has been studied intensively enough that if there were a single mechanism responsible for most human instances of it, the scienc

Agree. Also, cognitive decline has been studied intensively enough that if there were a single mechanism responsible for most human instances of it, the science around that single mechanism would've been settled by now. Instead what we seems to have is a disease where toxins, chronic infections by bacteria, viruses and fungi, cardiovascular health, genetic variability (e.g., apoE4) and metabolic-lifestyle factors like insulin resistance and lack of sufficient exercise are all important. But HN likes to upvote these announcements written by PR departments at universities.