How do you distinguish between a plain incident of forgetfulness or early signs of dementia? Dad lost some important papers today, or at least he discovered that they were lost today. When I asked where he last saw the papers and if he brought them out of the house, he couldn’t remember. Now, there have been some incidents in the past where he would forget things — not remembering to close the tap, where he put his hearing aid, etc. But in general, his memory was still fine. Today’s incident struck me as odd, because he didn’t seem to have any recollection of what happened during the last week. Should I be worried?