In some ancient science fiction movies, some humans living in pain were extremely envious of artificial intelligence.
Because artificial intelligence can choose what they want to remember and what they forget.
Humans can't do this. They can only become deeply entrenched in pain and unable to extricate themselves, relying on time to slowly erode their memories and an increasingly stronger will to resist pain.
However, when Harrison Clark as a human being really gained the ability of selective "forgetting", he suddenly realized that forgetting itself is actually a kind of pain.
The process of severing memories is, in itself, suffering.
Good memories represent the happiness he once experienced. Many unforgettable names lie in these memories - Carrie Thomas, Nora Camp, Martha Owen, Lion, Clark, and his grandfather, Moor Clark.
As well as many life fragments he treasures.
