This is where the confusion lies: Google claims Oracle is copyrighting an interface to Harry Potter (as per your example) -- i.e., they are claiming copyright to any / all characters that are (1) a boy in his early teens (2) has magical powers (3) goes to wizard school.
Now, the question is, where do we draw the line: As per Oracle, there cannot be any other character that does what Harry Potter does.
Now, the question is, where do we draw the line: As per Oracle, there cannot be any other character that does what Harry Potter does.