It doesn't manipulate copyright, it presupposes it. The 'left' part of copyleft is about distribution or dissemination, and other rights bestowed. It doesn't c

It doesn't manipulate copyright, it presupposes it. The 'left' part of copyleft is about distribution or dissemination, and other rights bestowed. It doesn't challenge copyright at all. You cannot grant rights for works without ownership, so PD has left the chat, so to speak.