The notable feature of copyleft is that it applies to derivatives.
So for 7, some software that incorporated BSD licensed code under some additional terms might not meet the open source definition, but the BSD source project would.
Copyleft requires that a derivative project be available under the same terms as the original work (or so, I guess some licenses might be mixable or whatever).
So for 7, some software that incorporated BSD licensed code under some additional terms might not meet the open source definition, but the BSD source project would.
Copyleft requires that a derivative project be available under the same terms as the original work (or so, I guess some licenses might be mixable or whatever).