Yesterday afternoon nap was excellent, got the full twenty minutes, and didn’t do too badly in the exam (not an A-grade paper, but I think that that can be accounted for by things other than the sleep deprivation).
Last night was harder – not just tired, but the kind of emotionally-fragile state that one gets after a couple of days without sleep.
2330 nap was extremely refreshing, however, and I’m feeling reasonably good at the moment.
The 2330 nap was interesting in that I remember dreaming, albeit briefly, which would confirm that I have indeed started to reach REM sleep in less than 20 minutes of downtime. Empirical validation FTW.