Can You Learn Words in Your Sleep?

i don't know about you, but i cannot sleep on an airplane. And if theyre, if you're am quizzed on vocabulary words at two a m, when you're super tired, i don't think i would do very well either. The lesson from to day's episode is not that you should be playing words in your sleep. It's that you should make sure you do have good sleep hygiene. I like that expression, sleep hygiene. That you what does that mean to you?