I have two specific questions: In other study technique books, they are emphasizing that how important its with repetitions. But
in the PR-book, its no paragraphs about repititions. Does it means that we dont need repeat or instead we are using activations?

Why do the brain need incubation time at 24h? According to study technique books were forgetting 90% of contents after
24 h that we have read (or study) a book
or other materials.

Jonas