The so-called "Future Experience Backtracking to Accelerate Comprehension of Laws" involved pulling out a version of yourself from one month in the future and then exchanging experiences on comprehending Laws, to hasten your understanding of them.
Why one month? Firstly, comprehending Laws is a gradual process, like when you're reading the first chapter of a book, you need a teacher who has just finished the first chapter, not someone who has read the entire book.
Admittedly, if the teacher had finished the whole book and gained a holistic understanding, they would be able to teach with greater ease.
The problem is that comprehending Laws is different from reading; it involves something called "unique personal understanding."