Memorize it without thinking; Learn by heart without the cognitive load! I love her brave way of advancing through classical studies!
The traditional education involved Inga studying texts entirely (among them the རྒྱུད་བཞི། Four tantras). When she started studying she didn’t know Tibetan language. Furthermore those books were not like the spoken Tibetan at all, so memorizing based on meaning or mnemonics was inviable.
After experimenting she found a method that worked for her — muscle memory. When you have learnt a song on the piano you are not thinking of the notes anymore when you start playing it. The fingers move automatically because you have the muscle memory. She realized the same happened with the tongue as you pronounce text.
By reading the text 1000 times — counting on the mala — she would not have to study it!