If you read https://forum.enlightenedstates.com/t/the-guide-to-nextgen-intelligence-fields/52941
It speaks of different brain circuits intertwining to create more hybrid, abstract functions.
Most compound. Mathematical madness, drops of memory, and manhattan method all improve working memory, while this can slow down time in your brain leading to working memory enhancements.
That’s just one example of brain fields combining to give gains into one skill.