Seeing famous actors e.g. Robin Williams, and Bruce Willis suffering from dementia made me wonder in later stages do the people still aware of death? We all know death because we know the process we learn from or it’s just that we instinctively aware of it?
No. This is besides the question. It has no relation to dementia.
It’s a pretty reasonable question to ask if you lose knowledge as well as memory. Your comment came off as quite dismissive.