From a technical perspective I have actually a hard time to argue what is an API, and what is 'normal code,' in particular because a lot of code uses internal i

From a technical perspective I have actually a hard time to argue what is an API, and what is 'normal code,' in particular because a lot of code uses internal interfaces and DSLs. However as an open source radical, I would lean in the opposite direction and argue that code shouldn't be copyrightable in the first place. And actually I think a ruling that APIs are copyrightable would be very good for copy left licenses and languages described in open standards, because they would not leave on at the mercy of a single monopolist.