Let me add that one way to become a type 2 person is to play a game with a theorem. Say you encounter something you don't really understand. The book says it

Let me add that one way to become a type 2 person is to play a game with a theorem. Say you encounter something you don't really understand. The book says it is true but you don't know why it is true. Forget about why it is true and see if you can do problems assuming it is true. Say to yourself, "Provided this is true what must logically follow from it?" See if you can use the result even though you don't know why it is true or where it came from.