Why we can forget our age?

The man on the photo is my grandpa in his twenties. He was an engineer, intelligent and witty until he started developing symptoms of dementia. Alzheimer’s in particular. He couldn’t recognize our family, couldn’t remember whether he has eaten or not, couldn’t remember what year it was – 1980 or 2010. Seeing how Alzheimer’s changed one of the most intelligent men I knew, made me realize how vulnerable everyone is to this disease, including me.