So awake-ostity, at least for a bit.
It gets funky when that analysis process turns inward and tries to analyze human factors that don't fit well into a linear process; you get things like trying to assign a pint value to your leg as a whole, then trying to reconcile that with summing the point values of the different components of your leg, while all the while recognizing that your leg has a dynamic quality that defies linearization and trying to work that into the effort estimation.
Is it any wonder I can't sleep?