> You can't remember states you haven't been in If only memory worked that way! False memories are commonplace. Where exactly did you put your keys? Even if

> You can't remember states you haven't been in If only memory worked that way! False memories are commonplace. Where exactly did you put your keys? Even if you give the right location, is that a true memory of the state you and the keys were in when you separated, or is it a retrodiction ("I probably put them in their usual storage place")? > A memory system that operates on the timescales of ... You mean one that measures parts of the world periodically? ISTR we discussed this some exp(10^120) years ago[1] but I forget whether we reached any conclusions. - -- [1] Dyson, Kleban & Susskind, 2002, https://arxiv.org/abs/hep-th/0208013 https://arxiv.org/abs/hep-th/0208013 eqn (5.2).