I recall reading the science fiction book "Quantum Night" by Robert J. Sawyer which touches on philosophical zombies. Not a spoiler: in the book a mechanism of

I recall reading the science fiction book "Quantum Night" by Robert J. Sawyer which touches on philosophical zombies. Not a spoiler: in the book a mechanism of the plot is that folks can be conscious with emotions, or a sociopath, or a philosophical zombie; science fiction magic allows the population to cycle-switch between these three states.