There is a natural dip in energy between 1:00 p.m. and 4:00 p.m., followed by another opportunity for learning as the circadian system rises before the evening.

“and then perhaps in the afternoon there's another opportunity be uh after the postp perenial dip that's right but before the post perenial dip sometime between 1 and 4 pm usually lasting about an hour to 90 minutes this is a dip natural dip in energy but then after that is another opportunity to learn”