[grue2]

Is sleep a death sentence?

To boil it down, "I" am made of two things: qualia and memories.

During unconscious sleep, those mysterious qualia disappear, except for brief chaotic flashes which we call dreams. Meanwhile a physical process takes place in the brain: those memories are reorganized, reformatted, and reconstituted.

In this view, there is a very literal sense to the idiom "I woke up feeling like a brand new person." Yet, few people go to sleep at night worrying that "they" will no longer exist in the morning, even though that is quite arguably the case.

I would worry about biological sleep long before I worried about teleporters. While any OSHA-compliant teleporter can (we would assume) preserve the continuity and integrity of one's memories, sleep doesn't even have that feature.