Incidentally, this reminds me that my Mum has in recent years suffered two episodes of Global Transient Amnesia (GTA). It was very odd - she'd say, "Oh hello love, how are you?", and seconds later would say it again. In the end her husband and I wrote down the day's events ("You're having a GTA episode", "You went to the doctor's this morning", "He said there was nothing to worry about and it will pass soon", "Then you came home and had a cup of tea" etc) and we'd hand it to her to read as if afresh every few minutes.
It was interesting to see her respond to the same info sightly differently each time ("Oh yes, a GTA episode - I had that once before didn't I?", "Oh, a GTA episode, but I thought the doctor said last time that it wouldn't happen again" etc) - it was if nothing was being written in her short term memory, but throughout she knew who I was for example. Sure enough, after a few hours everything re-booted as it were and she was good as new.
Not sure how this fits with the conversation here, but it was unsettling and fascinating in equal measure.