I think it is pretty well established that simply re-reading can trick you into thinking that you know the material (via recognition) instead of actually remembering/understanding.
It was briefly discussed in this episode of floss weekly https://twit.tv/shows/floss-weekly/episodes/622?autostart=fa... and I think the guest made an interesting observation in that quite a big issue in FSF is that the board is entirely self-selected, the community is not really involved. Thus, the future of the GPL is entirely in the hand of a few people who picked themselves so to say.