> Is a document not copyrightable based on its contents? Yes, exactly. It's copyright 101. For example, if you write a random number generator, and print 1000

> Is a document not copyrightable based on its contents? Yes, exactly. It's copyright 101. For example, if you write a random number generator, and print 10000 randon numbers in a document, it's not copyrightable. Even if you invented a specific random number generation algorithm, the document is still not copyrightable. Your code is copyrightable. Again it's just copyright 101. If any of above surprises you, maybe you should read a few copyright case studies.