I have a famously poor memory memory of childhood stuff, day to day. Even later, when I was a young woman, I have only snatches of memories. Can't remember day to day things at all. Or even things that seemed like important things to others. My youngest brother has a phenomenal memory. He's an entertainer. He does gigs in pubs, restaurants, and other small entertainment venues. Been doing that most of his adult life. At one time, he told me he had a five hour repertoire in his head, except his voice wouldn't hold out that long! So, maybe that's partly why he's so good. But he has clear memories of when he was young, of me bringing him to the first Star Wars movie, and to a couple of concerts. I have no memory at all of ever seeing any of the Star Wars movies, or of bringing him to any movies or concerts. Day to day, though, I'm fine. I don't forget appointments or stuff like that, although I'm convinced supermarkets spray us with stuff as we walk in the door to wipe our memory of what we went in for! And a couple of years in a row, I did two hours of cognitive & memory tests for a study on the effects of stress on spousal carers of people with dementia, and to my relief, I did very well on those. I've never, even as a child, been able to understand how figures work, so they didn't do the mathematical parts. The whole point of that study was to see if the amount of stress carers of people with dementia are more likely to develop cognitive impairment themselves, and/or go on to develop dementia, and the role stress plays in the development of dementia, so saliva samples were taken at intervals during the test too, to measure cortisol levels. All very interesting!