because you've suddenly switched to a sort of dualism. If you are a psychological reductionist (from some of your other choices, like say using the artificial brain parts), then you assume that minds are what brains do. There is no consciousness separate from your brain, your brain produces your consciousness. So all that matters for you to be alive is for some brain to be around that produces the same mental states you have. There could even be multiple of you!
But if you hop on the spaceship you threaten that continuity for the sake of your body. In that case you treat your consciousness as distinct from your body and are afraid of 'losing' it or not being able to transfer it should that particular body die. So you don't just care about your psychological state any more, you think your particular body 'carries' your mind around. That's a contradiction.
because you've suddenly switched to a sort of dualism. If you are a psychological reductionist (from some of your other choices, like say using the artificial brain parts), then you assume that minds are what brains do. There is no consciousness separate from your brain, your brain produces your consciousness. So all that matters for you to be alive is for some brain to be around that produces the same mental states you have. There could even be multiple of you!
But if you hop on the spaceship you threaten that continuity for the sake of your body. In that case you treat your consciousness as distinct from your body and are afraid of 'losing' it or not being able to transfer it should that particular body die. So you don't just care about your psychological state any more, you think your particular body 'carries' your mind around. That's a contradiction.