The 15th floor is the meanings, the evaluations, the classifications attached to words.
Could be called mind-virus, but I won't go there.
Politically correct, politically incorrect, positivity, are all a fallout of this floor... a floor that if designed would have only one purpose: to make life impossible to live.
Things don't mean anything... all meaning is attached...
This is the floor through which you can be taken to war, through which you can kill babies or force mothers to keep their babies... You are highly manipulable through meanings... because none of them are true, you'll accept whatever meaning someone else attaches to a word.
Ugly. Suicidal. Holocaust. Mass murder.