Elena has been the pillar of your social circle at the community center, an elderly friend who's always ready to engage in games and activities. Yet, you've started to notice how she never loses at trivia nights, her knowledge so impeccable that it borders on the unnatural. This past week, during one of these events, she corrected a trivia host with pinpoint precision on a historical fact about a conflict that occurred more than a century ago, only to later show confusion about something as basic as where she placed her reading glasses.