Odd... observation.

[Ar7]

Usually when I have already stayed up until 4AM, then I stay awake the entire night and the day after. You won't believe how good you will sleep after that.

[NEXUS7]

There are things we know and things we don’t know
But we know we don’t know them. There the
"Known unknowns" But there are things we don’t know we don’t know

“And it’s the “Unknown unknowns” that we should be worried about”

Good old Donold R