Years ago, I found I could survive on 4.5 hours of sleep per night but that my creativity died. Seems that Jim Collins feels the same way http://is.gd/HCXE
It was while I was at university, and while I found that I could work hard enough to get some of my best academic results, I felt drained. Not that I couldn’t think – but just that I could only think within the rules. I couldn’t look beyond the rules, frameworks and paradigms that were presented to me, and I certainly couldn’t explore the connections between systems. So I went back to enjoying dreams.
Still, it was a worthwhile experiment!