According to Ericsson deliberate practice for knowledge work is not possible because the criteria are not objective (you don't know if you're doing well).

This collides with Dr. Sönke Ahrens' contention that note taking, specifically elaboration, instantiates two feedback loop. One feedback loop in that you can see whether you're capturing the essence of what you're trying to make a note on and a second feedback loop in that you can see whether your note is not only an accurate description of the original idea, but also a complete one.

Put differently, note taking instantiates two feedback loops. One for precision and one for recall.