What are the two categories of discovery in The Boy in Striped Pyjamas according to Bruno?

In "The Boy in the Striped Pajamas," Bruno categorizes discovery into two types: the things you find out for yourself and the things others tell you. He values personal experiences and firsthand knowledge over what is merely communicated by others, reflecting his innocence and curiOSity about the world around him. This perspective emphasizes the importance of understanding and exploring one's environment rather than simply accepting information at face value.