Earlier quoted context omitted.
> Dumping tokens into a pile of linear algebra doesn't magically create sentience. More precisely: we don't know which linear algebra in particular magically creates sentience. Whole universe appears to follow laws that can be written as linear algebra. Our brains are sometimes conscious and aware of their own thoughts, other times they're asleep, and we don't know why we sleep .
> we don't know why we sleep Garbage collection, for one thing. Transfer from short-term to long-term memory is another. There's undoubtedly more processes optimized for or through sleep.
Worse, evolution clearly can get around this, dolphins have a trick that lets them (air-breathing mammals living in water) be alert 24/7, so why didn't every other creature get that? What's the thing that dolphins fail to get, where the cost of its absence is only worthwhile when the alternative is as immediately severe as drowning?