It is easy to understand in practice. For example in Python: >>> type(5) <class 'int'> >>> type(type(5)) <class 'type'> >>> type(type(ty

It is easy to understand in practice. For example in Python: >>> type(5) <class 'int'> >>> type(type(5)) <class 'type'> >>> type(type(type(5))) <class 'type'>