When my acquaintance got out of a coma in which he was for 40 days, he was transferred to the general room from the resuscitation. His doctor comes, asks various questions, what is the year, name, surname and so on. He always answers correctly. The last question was this:
What color are the walls in the room?
“Green,” my companion replied.
is wrong. The salad. Your color sensation is disrupted. I need treatment, the doctor said.
You are a salad! There is no such color. This is a shadow.