Hello Ethan, They both can be used for your examples and have virtually the same meaning: Shallow - showing a lack of depth in thinking Superficial - perceiving things at a surface level, ie. without depth. Note: a LACK of depth and WITHOUT depth. When discussing a way a person views something (their action), you would use Superficial, and if you are describing the person themselves, you would say either Shallow or Superficial. Hope that helps