Scientists. Like hardcore psychologists... If I don't sleep, and go through another day of hardcore manual labor.. You really think it'll subtract from my life that much.. I've heard things, but I don't fully believe them, and they havent been fully proven.
Nor has your science in general. After ALOT of research I usually come to the conclusion that no one really KNOWS FOR SURE about the human psyche.. I would like to though. Maube I missed or forgot.. Or have yet to learn about something you know.
I wanted to say know one REALLY KNOWS SHIT, but that seemed way too cocky.