Also, CC0 etc. are not really called "permissive licenses", because they explicitly waive away any and all rights a license would entail. In the same way "off"

Also, CC0 etc. are not really called "permissive licenses", because they explicitly waive away any and all rights a license would entail. In the same way "off" isn't a TV channel. Creative commons specifically calls CC0 an "alternative to our licenses" [1] https://creativecommons.org/share-your-work/public-domain/cc0/ https://creativecommons.org/share-your-work/public-domain/cc...