After arriving in Ohara, Mousse discovered a new problem: many of the books here had more than one edition, and some details even directly contradicted one another. If he could access them all directly, which version should he use?
"So the original information from books shouldn't be stored in the outermost layer of memory. The outermost layer should contain only my own understanding!"
Then an idea that had already begun to take shape in Mousse's mind rapidly solidified.
Responding to Mousse's request, the Book-Book Fruit's power clearly displayed all the layers of his memories. He then discovered that they were somewhat different from what he had imagined:
The outermost layer could be accessed at will without thought. After considering it, Mousse decided to retain only core information that absolutely could not be forgotten, such as language, writing, logic, and his values;
The next layer contained information that would automatically come to mind upon encountering related situations, such as famous quotes, well-known passages, and broad, summarized information—for example, a novel's main plot and character portrayals. His own understanding and insights after reading only needed to be placed in this layer; there was no need to put them in the outermost layer;
The layer beneath that stored information that could be recalled after thinking seriously for a while. Important original texts from books—things worth memorizing for ordinary people—would be placed here, though the focus was mainly on the meaning of the books rather than their exact wording;
Only at an even deeper level would true original book texts appear. Recalling things from this layer was rather strenuous, and memories placed here by the brain had generally been recorded without much attention in the first place, so they were less accurate and inevitably incomplete;
Mousse called the deepest layer the "encrypted layer." It