Micro gaps in learning sessions can provide the equivalent of 30 repetitions, similar to REM sleep rehearsal.

“You're basically getting 30 repetitions for doing nothing. This is exactly what happens in, what? In rapid eye movement sleep. When you learn something, like maybe you learned something today in our discussion thus far, and you go to sleep at night, there's a very strong chance that if we were to record from your brain, we would see that the same areas of your brain that were active during specific portions of this discussion, which arguably is more of a lecture than a discussion, but those brain areas would repeat at 20 to 30 times speed within a compressed time.”