Like many of us who have had a relative or friend succumb to memory loss, who are getting older, who are hearing statistics about our own chances of falling victim to dementia, who worry that each lapse of memory portends disease, Sue Halpern wanted to find out what the experts really knew, what the bench scientists were working on, how close science is to a cure, to treatment, to accurate early diagnosis and, of course, whether the crossword puzzles and sudukos and ballroom dancing we’ve been told to take up can really keep us lucid, or if they’re just something to do before the inevitable overtakes us. In Can't Remember What I Forgot, she shares what she learned.