so i'm sure somebody has written about this i'm fuzzy on whether antiparticles really behave like normal particles with reversed time to such a degree that you could make physical systems like ours that behave backward if you could stabilize the impossibly large and precise amounts of antimatter needed but for example if you believe in a deterministic mind, which certainly helps the work of neuroscientists to believe in (lots of research in the mind being caused by precise neuron firings) then if one was made out of antimatter it would have a [very brief] experience of consciousness traveling from the future (when its creators let it be destroyed, ie its consciousness's earliest memories) to the past (when its creators create it, ie its consciousness's last memories, thoughts, and perceptions, which it never stores). now the physical precision of that isn't reasonable because of the reversed causality and entropy, and that's something that would involve further exploration to consider. you'd simplify the system to something much simpler, like a single component that can store state. what you might find is that every component of the system and its environment needs to be precisely, thoroughly, and beyond extensively correct, for the system to actually operate backwards, forming the correct information in the past from the information in the future -- and that that is because of the block universe model that that happens. so to make the situation interesting we look for gaps in that reasonably possible situation -- ways that it could be more operable. one of these ways is to consider the state of the universe simulatable with AI in fine detail. another way is to consider sending "probes" of some sort in order to refine a description of what is going on, both to essentially predict the future before running it. another way is to imagine that things that are not precisely accurate still hold the information that was intended, just "encrypted" of sorts into what actually happened -- this is similar to the idea of reincarnation and might let one imagine their consciousness at disparate locations similar to quantum tunneling. another "gap" could be quantum uncertainty and the multiple universe interpretation. in the multiple universe interpretation of the double slit experiment we could imagine that consciousness made of antimatter going backward in time, but engaging situations of quantum uncertainty like schrodinger's cat, and ending up in a different universe where it keeps living before the destruction caused by its own creation. [my physics knowledge is a few decades outdated]