But it's very difficult to capture this phenomenon in the laboratory, because it's one of a kind phenomenon when you have an insight, you come up with an idea, it's an n of 1, how are you gonna replicate that? so people in Lubeck, the group of Jan Born, in Germany, they were able to come up with a very nice experiment, I'm not gonna go into the details, because I only have 5 minutes and a lot of slides to go but basically what they did was to get a psychological test called the number reduction test that is very standard in psychology, but they had a trick, an implicit structure, they had some information that was hidden, and what they found was that when people had access to sleep they were much more likely to come up with the answer to understand the implicit information and this is what they attribute to restructuring of memories if you come up with a new idea, you have to admit, if you're within the physical realm that this new idea came from your old ideas that were somehow remixed, OK? so they're showing that sleep promotes that. 