Alzheimers and other dementive condition can make one forget unimaginably simple things, including the exact locations of private keys; one may also start forgetting names & people's faces; the global forgetfullness due to environmental intoxication (food, water, air, ether) & parasitic infestation is rising - i often see it in real time... tho perhaps i am also more sensitive to people's ailments;

one shud keep the body clean & strong and the mind sharp - then most problems go away;