I believe PD, not CC-0 is public domain. That is to say, if you do not say "Public Domain", it is not public domain. We already have public domain. I do not think we need CC-0
I believe PD, not CC-0 is public domain. That is to say, if you do not say "Public Domain", it is not public domain. We already have public domain. I do not think we need CC-0