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Of course code declarations are "code" the same way a library listing of book titles is made up of "words". Unique, creative words that cannot be explained by chance or well known to the audience before their creation by the author. Yet, none should be protected by copyright, this is the intention of "is not code".

Your example is a good one because it is established law that book titles can't be copyrighted.

But it can be trademarked. Still, I can't see anybody successfully managing to apply trademark law to APIs in general.

I think a better analogy would be the table of contents for a novel.

Function headers are no more code than a table of contents entry is a story.

https://ncatlab.org/nlab/show/red+herring+principle

See Java & JavaScript ;)

Yes, because dwarf persons aren't persons, right?

Dwarf persons aren't dwarves.

Did I say something offensive?