This is not at all intuitive to me. It doesn't make sense in a human perspective, as each book changes you. Consider the trivial case of a series, where nothing

This is not at all intuitive to me. It doesn't make sense in a human perspective, as each book changes you. Consider the trivial case of a series, where nothing will make sense if you haven't read the prior books (not that I think they feed it the book corpus in order maybe they should!), but even in a more philosophical sort of way, each book changes you. and the person who reads Harry Potter first and The Iliad second will have a different experience of each. Then, with large language models, we have the concept of grokking something. If grokking happens in the middle of book 1, it is a different model which is reading book 2 and of course the inverse applies.