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the concept of self refers to a system of particles temporarily arranged, constantly changing. it's a ship of theseus of sorts: theoretically particles previously having made you could arrange themselves into your exact formation, and it'd be a temporary perfect clone of "you" in that instant. but different experience would shape that version of you differently through time, plus the energy required in the first place is completely infeasable - why its theoretical.
sense of self is an evolved neurological illusion benificial to maintain an organism's survival. but computationally its just a more adaptive neural network (predictive coding) built off biochemistry instead of metals. therefore it's only algorithmic, and there is no free will... and death is the inevitable entropy of the void that infinitely surrounds.

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there is no moral realism. morality is a subjective basis for acomplishing a task