"on Fractured grinding (repeating the same action over and over) is not the way you earn Knowledge Points. On the opposite, their acquisition takes place naturally during the course of your gaming sessions β and the more varied are the things you do, the better!"
This ^^ is how Fractured determines grind. And like we know, Fractured is marketing itself as no grind game. This can be a little bit misleading though, because grind can be think as time you need to use to progress next level. So Fractured goals to make that grind more enjoyable, but it is still there like @Jetah mentioned. Under here is plan how knowledge system and ability progression are planned to implement:
"Abilities, however, are not only meant to be learnt once, since they feature up to 3 levels of power! Completing only 2 tasks of a Discovered ability allows you to study an ability to level 1. After that, you need to have at least 4 tasks completed to study it to level 2 and 6 tasks completed to study it to level 3."
So as we can see, the progression is tide under different tasks. Now how grindy this system at the end will be depends on what these tasks exactly contains and how much time and effort players needs to see to accomplish those.
https://fracturedmmo.com/feature-spotlight-3-knowledge-system/