scratching surface
- scrapingRubbing away material
- surfaceOutermost boundary layer
- shallowWithout much depth
- skimPass over lightly
- grazingFeeding on pasture
abrasion · etching · nails · itch · digging · beneath · deeper · veneer · peeling · uncovering · rough · texture · friction · mark · groove · investigation · probing · beginning
depth of exploration/understanding
scratching surfacegetting to the bottom of
Determining the root cause
deep dive · digging deep · comprehensive understanding · forensic examination · leaving no stone unturned