::: spoiler spoilers there's a theory i buy into that dubois managed to forget his memories because he put his head into the tiny ball of pale in the church to erase his memories while drunk after jumping his car over the bridge and then managed to stagger back to his room in the whirling in rags (as opposed to just drinking until he forgot almost all of his memories) and in the process he gained a load of information from it (which is why and can tell you so much info that you have no way of knowing, including stuff from the future)