This was a really cool and insightful essay, thank you for sharing. I've always conceptualized the mind as a complex physical, chemical, and electrical pattern (edit: and a social context) - if I were to write a sci fi story about people trying to upload their brain to a computer I would really emphasize how they can copy the electrical part perfectly, but then the physical and chemical differences would basically kill "you" instantly creating a digital entity that is something else. That "something else" would be so alien to us that communication with it would be impossible, and we might not even recognize it as a form of life (although maybe it is?).